McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: General Knowledge (GK) .
| 1601. |
Which of the following statements about phloem transport is correct? |
| A. | phloem transport occurs unidirectionally |
| B. | gravity influences phloem transport |
| C. | Ca+ is the most abundantcation in phloem sap |
| D. | sugar is transported in phloem as nonreducing sugar |
| Answer» D. sugar is transported in phloem as nonreducing sugar | |
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Explanation: According to most textbooks, only non-reducing carbohydrate species such as sucrose, sugar alcohols, and raffinose family sugars function as phloem translocates. In non- reducing sugar, the hydroxyl group on the anomeric carbon, the number one car-bon, is tied up which means that they are less reactive and more chemically stable. Exclusive transport of non-reducing sugars probably reflects packaging of carbohydrate in a chemical form which protects it from being metabolized. |
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| 1602. |
What causes the mottling of the dental enamel? |
| A. | High levels of chlorine in water |
| B. | High levels of nitrate in the water |
| C. | High levels of fluorides in the water |
| D. | High levels of calcium in the water |
| Answer» C. High levels of fluorides in the water | |
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Explanation: The mottling of dental enamel is an extremely common disorder, characterized by hypomineralization of tooth enamel caused by ingestion of excessive fluoride during enamel formation. It is also known as dental fluorosis. Common causes of fluorosis include: fluoridated drinking water (particularly during infancy), ingestion of fluoride toothpaste, use of fluoride tablets, and consumption of processed foods made with fluoridated water. |
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| 1603. |
Intensive cultivation refers to |
| A. | production with intensive use of labour |
| B. | production with intensive use of fertilizer |
| C. | raising production by intensive use of existing land |
| D. | raising production by large scale use of imported inputs |
| Answer» C. raising production by intensive use of existing land | |
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Explanation: Intensive farming is an agricultural intensification and mechanization system that aims to maximize yields from available land through various means, such as heavy use of pesticides and chemical fertilizers. It is characterized by a low fallow ratio, higher use of inputs such as capital and labour, and higher crop yields per unit land area. |
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| 1604. |
Which one of the following statements about PYROLYSIS, which is a process for solid waste treatment is incorrect? |
| A. | It converts the waste into solid, liquid and gas of which the resultant liquid and gas can be used to produce energy. |
| B. | The process occurs at a temperature above 430°C at atmospheric pressure. |
| C. | The process occurs under high pressure at temperature above 430° C. |
| D. | It is a thermo chemical decomposition of organic waste |
| Answer» B. The process occurs at a temperature above 430°C at atmospheric pressure. | |
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Explanation: Pyrolysis is a thermo-chemical decomposition of organic material at elevated temperatures in the absence of oxygen (or any halogen). Pyrolysis generally takes place well above atmospheric pressure at temperatures exceeding above 430 °C. |
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| 1605. |
In bio fortification technique plant breeders use breeding to overcome |
| A. | Loss due to insect pests |
| B. | Decrease in food production |
| C. | Deficiencies of micronutrients and vitamins |
| D. | Loss due to plant diseases |
| Answer» C. Deficiencies of micronutrients and vitamins | |
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Explanation: Biofortification refers to the breeding of crops to increase their nutritional value. The crops produced through biofortification method are always rich in nutrients like iron, zinc and Vitamin A. for example, Golden rice was produced using the method of bio-fortification. This rice is rich in beta-carotene and provides vitamin A to the children. |
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| 1606. |
Rotation of crops is essential |
| A. | For increasing the quantity of minerals. |
| B. | For decreasing the quantity of proteins. |
| C. | For getting different kinds of crops. |
| D. | For increasing fertility of the soil. |
| Answer» D. For increasing fertility of the soil. | |
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Explanation: Crop rotation is the practice of growing a series of dissimilar/different types of crops in the same area in sequenced seasons. It gives various nutrients to the soil, thus, maintaining soil fertility, organic matter levels and soil structure. It also helps in the replenishment of nitrogen through the use of green manure in sequence with cereals and other crops. |
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| 1607. |
What do you understand by the term Dark Fermentation'? |
| A. | It is a method to dispose nu-clear wastes. |
| B. | It is a method to produce methane from organic wastes. |
| C. | It is a method to reduce COD in the atmosphere. |
| D. | It is a method to produce Hydrogen as a fuel from waste water. |
| Answer» D. It is a method to produce Hydrogen as a fuel from waste water. | |
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Explanation: Dark fermentation is the fermentative conversion of organic substrate to bio-hydrogen. It is a complex process manifested by diverse groups of bacteria,involving a series of biochemical reactions using three steps similar to anaerobic conversion. Wastewater is used as a potential substrate for bio-hydrogen production in the dark fermentation process. |
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| 1608. |
Which of the following listed is not a feature of organic farming? |
| A. | The non-use of chemical fertilizers and pesticides |
| B. | Soil is nurtured for furture use by maintaining micro-or-danisms tin |
| C. | Use of synthetic fertilizers |
| D. | Very less energy consumption |
| Answer» C. Use of synthetic fertilizers | |
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Explanation: Organic farming is a form of agriculture that re-lies on techniques such as crop rotation, green manure, compost, and biological pest control. It uses fertilizers and pesticides if they are considered natural (such as bone meal from animals or pyrethrin from flowers), but it excludes the use of synthetic petrochemical fertilizers and pesticides, plant growth regulators, etc. |
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| 1609. |
Which of the following series is true about energy flow in an ecosystem? |
| A. | Producers Decomposers Consumers |
| B. | Decomposers Consumers Producers |
| C. | Producers --> Consumers --> Decomposers. |
| D. | Consumers --> Producers Decomposers. |
| Answer» C. Producers --> Consumers --> Decomposers. | |
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Explanation: 0 |
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| 1610. |
Rate of cooling depends on the |
| A. | Temperature difference between the body and the surroundings |
| B. | Nature of the radiating surface |
| C. | Area of the radiating surface |
| D. | All of these |
| Answer» D. All of these | |
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Explanation: Newton's Law of Cooling states that the rate of temperature of the body is proportional to the difference between the temperature of the body and that of the surrounding medium. When a body cools by radiation, then rate of cooling depends upon the following factors: • Nature of the radiating surface, that is, emissivity; • Area of the radiating surface; • Mass of the radiating surface; 10 Specific heat of the radiating body; • Temperature of radiating body and ♦ Temperature of the surrounding. |
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| 1611. |
What is the Kyoto Protocol? |
| A. | It is an agreement among countries to take steps for reducing acid rain |
| B. | It is an agreement among countries to take steps for planting trees to control pollution |
| C. | It is an agreement among countries to start using nu-clear energy |
| D. | It is an agreement among countries to take steps for reducing global warming |
| Answer» D. It is an agreement among countries to take steps for reducing global warming | |
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Explanation: The Kyoto Protocol is an international treaty, which extends the 1992 United Nations Framework Convention on Climate Change (UNFCCC) that commits State Parties to reduce greenhouse gases emissions, based on the premise that (1) global warming exists and (2) man-made CO2 emissions have caused it. |
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| 1612. |
For a healthy heart, one needs to take a balanced diet, adequate sleep and - |
| A. | indulge in vigorous mental activities |
| B. | play games like carrom, chess and cards |
| C. | do right amount of physical exercise |
| D. | do sedentary work |
| Answer» C. do right amount of physical exercise | |
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Explanation: Physical activity is any form of movement that works our muscles and uses more energy than we use when resting. Walking, running, dancing, swimming, yoga and gardening are examples of physical activity. Being physically active, along with following a healthy diet and not smoking, is one of the most important things one can do to keep heart and lungs healthy. Physical activity strengthens our heart and reduces coronary heart disease risk factors. |
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| 1613. |
Which of the following statements is true? |
| A. | Dehusked cereals and pulses are more nutritious |
| B. | Whole grain cereals and pulses are more nutritious |
| C. | Processed cereal products are nutrient dense |
| D. | Breakfast cereals are nutrient dense |
| Answer» B. Whole grain cereals and pulses are more nutritious | |
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Explanation: Cereal and pulse crops are staple foods that provide essential nutrients to many populations of the world. Traditionally, whole grains were consumed but most current foods are derived from refined fractions of cereal and pulse crops. Consumption of processed or refined, products may reduce the health benefits of food. In wheat-based processed foods, for example, the removed 40% of the grain (mainly the bran and the germ of the wheat grain) contains the majority of the health beneficial components. |
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| 1614. |
The main use of salt in the diet is to - |
| A. | increase the solubility of the food particles in water. |
| B. | produce in small amounts the hydrochloric acid required for the digestion of food |
| C. | ease the process of cooking |
| D. | make the taste of the food better |
| Answer» B. produce in small amounts the hydrochloric acid required for the digestion of food | |
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Explanation: Salt plays a primary role in the processes of digestion and absorption. Salt activates an enzyme in the mouth called salivary amylase. Salt also creates hydrochloric acid. Hydrochloric acid is a very important digestive secretion, which lines the stomach walls. |
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| 1615. |
Which of the following correctly explains the phenomenon of "Test Tube Bally"? |
| A. | When every process of embryo formation is in the test tube. |
| B. | When the embryo develops in a test tube. |
| C. | When the fertilisation is external and development is internal. |
| D. | When the fertilisation is internal and development is external. |
| Answer» C. When the fertilisation is external and development is internal. | |
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Explanation: Test tube baby is born from in vitro fertilization. In vitro fertilization (IVF) is a process by which an egg is fertilized by sperm outside the body: in vitro. When a woman's natural cycle is monitored to collect a naturally selected ovum (egg) for fertilization, it is known as natural cycle NF. The fertilized egg (zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy. |
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| 1616. |
Which of the following events occurred first? |
| A. | DNA structure of genes was discovered by James D Watson and Francis Crick |
| B. | Yuri Gagarin became the first man in space |
| C. | World's first human heart transplant was performed by Dr. Christian Barnard |
| D. | World's first test tube baby Louise Brown was born in U.K. |
| Answer» A. DNA structure of genes was discovered by James D Watson and Francis Crick | |
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Explanation: Discovery of DNA structure of genes: 25 April, 1953; Yuri Gagarin's feat of becoming the first man in space: 12 April, 1961; World's first human heart transplant: 3 December, 1967; and World's first test tube baby: 25 July, 1978. |
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| 1617. |
Identify the correct statement with respect to Biogas. |
| A. | Mixture of gases from volcanoes |
| B. | Gas produced from certain crude oil wells |
| C. | Gas produced by incomplete combustion of biomass |
| D. | Gas produced by fermentertian of biomass |
| Answer» D. Gas produced by fermentertian of biomass | |
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Explanation: Biogas is produced by the anaerobic digestion or fermentation of biodegradable materials such as biomass, manure, sewage, municipal waste, green waste, plant material, and crops. Biogas comprises primarily methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture and siloxanes. |
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| 1618. |
Heart attack occurs due to – |
| A. | Bacterial attack on the heart |
| B. | Stopping of heart beat |
| C. | Lack of supply of blood to the heart itself |
| D. | Impairment of heart's working due to unknown reasons |
| Answer» C. Lack of supply of blood to the heart itself | |
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Explanation: A heart attack occurs when blood flow to a part of your heart is blocked for a long enough time that part of the heart, muscle is damaged or dies. The medical term for this is myocardial infarction. Most heart attacks are caused by a blood clot that blocks one of the coronary arteries. The coronary arteries bring blood and oxygen to the heart. If the blood flowis blocked, the heart is starved of oxygen and heart cells die. |
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| 1619. |
'Green House Effect' means - |
| A. | cultivation of crops in green house to conserve heat |
| B. | trapping of solar energy due to carbon dioxide gases |
| C. | trapping of solar energy by earth upper surface |
| D. | increase of heat due to atmospheric pollution |
| Answer» B. trapping of solar energy due to carbon dioxide gases | |
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Explanation: Green House Effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases and is re-radiated in all directions. |
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| 1620. |
Fat present below the skin surface in our body acts as a barrier against – |
| A. | loss of heat from the body |
| B. | loss of essential body fluids |
| C. | loss of salt from the body |
| D. | entry of harmful micro-organisms from the environment |
| Answer» A. loss of heat from the body | |
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Explanation: A layer of body fat acts as an insulator and traps heat. The subcutis is the deepest layer of skin. The subcutis, consisting of a network of collagen and fat cells, helps conserve the body's heat and protects the body from injury by acting as a "shock absorber. |
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| 1621. |
Xylem fibres are made up of – |
| A. | Scierenchyma cells with thin walls |
| B. | Scierenchyma cells with thick walls |
| C. | Parenchyma cells with thin walls |
| D. | Scierenchyma cells with no obliteration in central lumen |
| Answer» B. Scierenchyma cells with thick walls | |
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Explanation: Fibre that occurs as element of Xylem is called Xylem fibre. It is also referredto as Xylary fibre and wood fibre. It is made up of Scierenchyma cells with thick walls. |
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| 1622. |
Which of the following item is not included in Environmental Auditing? |
| A. | Pollution monitoring schemes |
| B. | Scrutiny by the government agencies |
| C. | Safety provisions for industrial workers |
| D. | Storage of toxic chemicals |
| Answer» B. Scrutiny by the government agencies | |
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Explanation: Scrutiny by the Government agencies is not included in the Environmental Auditing. |
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| 1623. |
Membrane lipids of chillsensitive plants contain - |
| A. | low proportion of saturated fatty acids. |
| B. | low proportion of unsaturated fatty acids. |
| C. | equal proportion of saturated and unsaturated fatty acids. |
| D. | high proportion of unsaturated fatty acids. |
| Answer» D. high proportion of unsaturated fatty acids. | |
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Explanation: The membranes of chill sensitive plants have been found to have about a 2:1 ratio of unsaturated to saturated fatty acids. It has been seen that the proportion of unsaturated membrane fatty acids increases and the critical temperature decreases when chill-sensitive plants are acclimated to a low temperature. |
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| 1624. |
Natural organic fertilizers are found to be better then chemical fertilizers because – |
| A. | chemical fertilizers are less productive |
| B. | organic fertilizers are more productive |
| C. | organic fertilizers sustain soil productivity |
| D. | chemical fertilizers are toxic |
| Answer» C. organic fertilizers sustain soil productivity | |
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Explanation: Organic fertilizers like compost are either soil conditioners or growth enhancers. They sustain crop yields and soil productivity inintensive cropping systems which leave low organic residues on the soil. |
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| 1625. |
Select the High Yielding Varieties of seed-crops developed under Green Revolution in India. |
| A. | Rice, Wheat, Pulses, Oil seeds and Sugarcane |
| B. | Maize, Black-gram, Jowar, Coffee arid Tea |
| C. | Rice, Wheat, Jowar, Bajra, and Maize |
| D. | Wheat, Rice, Sugarcane, Pulses and Maize |
| Answer» A. Rice, Wheat, Pulses, Oil seeds and Sugarcane | |
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Explanation: The growth rates of area, production and yield of food grains in India can be divided into two broad periods the period 1949-50 to 1964-65, signifying the pre-green revolution period, and then after omitting two drought years 1965-66 and 1966-67, the second period of 1967-68 to 1996-97 represents the post green revolution period. The main impact of green revolution was on wheat, as production increased by 300 percent. High Yielding Varieties of wheat, rice, pulses, oilseeds and sugarcane were development under Green Revolution in India. |
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| 1626. |
Among the following sets of salient features, which set does not exclusively characterize mammals? |
| A. | Presence of sweat, glands, hairs on skin and diphyoclonts |
| B. | Presence of mammary glands, sweat glands and diaphragm |
| C. | Presence of mammary' glands, sweat glands, and diaphragm |
| D. | Presence of mammary glands, hairs on skin and diaphragm. |
| Answer» C. Presence of mammary' glands, sweat glands, and diaphragm | |
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Explanation: Ayes are also worm blooded and their heart is four-chambered. Crocodiles (Reptilia) also have fourchambered heart. |
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| 1627. |
A person with 'AB' blood group is sometimes called a universal recipient because of the – |
| A. | lack of antigen in his blood |
| B. | lack of antibodies in his blood |
| C. | lack of both antigens and antibodies in his blood |
| D. | presence of antibodies in his blood |
| Answer» B. lack of antibodies in his blood | |
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Explanation: 0 |
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| 1628. |
The duration 19-21 days refers to: |
| A. | incubation period of hen's egg |
| B. | average life-span of a red blood cell in humans |
| C. | the period of menstrual cycle soon after menstruation, during which fertilisation is most likely to occur |
| D. | period of completion of one schizogony cycle of malarial parasite inside a red blood cell |
| Answer» C. the period of menstrual cycle soon after menstruation, during which fertilisation is most likely to occur | |
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Explanation: The menstrual cycle is the scientific term for the physiological changes that occur in fertile women and other female primates for the purposes of sexual reproduction. It takes approximately 28 days to complete although this does vary from person to person. Length variation between eight and 20 days is considered as moderately irregular cycles. Variation of 21 days or more between a woman's shortest and longest cycle lengths is considered very irregular |
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| 1629. |
'Kyoto Protocol', an agreerne; signed by various =Indies, is associated with - |
| A. | Clean Environment and Climate Change |
| B. | Building common food stock to save human beings from any natural disaster |
| C. | International Trade |
| D. | Deep Sea 011 and Mineral Exploration |
| Answer» A. Clean Environment and Climate Change | |
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Explanation: Kyoto Protocol (1997) is associated with the reduction of greenhouse gases. |
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| 1630. |
Carbon monoxide poisoning can be cured by - |
| A. | exposing the affected person to fresh oxygen. |
| B. | eating butter. |
| C. | drinking lemon-water. |
| D. | consuming multi-vitamin tablet. |
| Answer» A. exposing the affected person to fresh oxygen. | |
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Explanation: Carbon monoxide poisoning can be cured by exposing the affected person to fresh oxygen. |
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| 1631. |
The main function of insulin in the human body is – |
| A. | to maintain blood pressure |
| B. | to help in digestion of food |
| C. | to control the level of sugar in the body |
| D. | to check the level of iodine in the body |
| Answer» C. to control the level of sugar in the body | |
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Explanation: Insulin is a peptide hormone, produced by beta cells of the pancreas, and is central to regulating carbohydrate and fat metabolism in the body. |
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| 1632. |
The DPT vaccine is given toyoung babies to protect them from – |
| A. | diphtheria, polio and tetanus |
| B. | diphtheria, pneumonia and tuberculosis |
| C. | diphtheria, smallpox and tetanus |
| D. | diphtheria, whooping cough and tetanus |
| Answer» D. diphtheria, whooping cough and tetanus | |
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Explanation: DPT refers to a class of combination vaccines against three infectious diseases in humans: diphtheria, pertussis (whooping cough) and tetanus. The vaccine components include diphtheria and tetanus toxoids, and killed whole cells of the organism that causes pertussis. |
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| 1633. |
Which one of the following is not a benefit of saliva – |
| A. | It facilitates swallowing |
| B. | It increases RBCs in the body |
| C. | It keeps the mouth and teeth clean |
| D. | It aids speech by facilitating movements of lips and tongue |
| Answer» B. It increases RBCs in the body | |
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Explanation: Saliva does not increase the number of red blood cells in the body which is a condition of disease called Polycythemia. It results in an increased level of circulating red blood cells in the bloodstream. 674. |
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| 1634. |
The process of photosynthesis involves conversion of |
| A. | chemical energy into radiant energy |
| B. | chemical energy into mechanical energy |
| C. | solar energy into chemical energy |
| D. | mechanical energy into solar energy |
| Answer» C. solar energy into chemical energy | |
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Explanation: Photosynthesis is the process by which light energy is converted into chemical. Energy by organisms. Carbon dioxide, and water are the raw materials of this process. The light energy comes from the sun and its end products are oxygen and glucose. |
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| 1635. |
When a child is born, what happens to its blood circulation? |
| A. | Its blood flows for the first time |
| B. | Its blood reverses its flow through the heart |
| C. | Its blood ceases to pass from one atrium to the other |
| D. | Its blood carries wastes for the first time |
| Answer» D. Its blood carries wastes for the first time | |
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Explanation: The Fetal circulatory system is unique during pregnancy before the lungs first come into use at birth. Its circulatory system must reorient itself to send all the blood through the lungs to receive oxygen. The baby is cut off from the placenta, which was previously its only |
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| 1636. |
Quarantine regulation is concerned with |
| A. | growing of better varieties of plant |
| B. | prevention of entry of diseased organism |
| C. | spraying of insecticide over diseased plants |
| D. | identification of diseased organism |
| Answer» B. prevention of entry of diseased organism | |
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Explanation: Quarantine is compulsory isolation, typically to contain the spread of something considered dangerous, often but not always disease. Quarantine legislation is in place in countries worldwide restricting the import of non-indigenous plant and animal pathogens. Those who wish to import such organisms must hold the relevant import permit, which can be obtained, from the relevant country Authority. |
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| 1637. |
Which one of the following set belongs to the class Mammalia? |
| A. | Lion, Hippopotamus, Penguin, Bat |
| B. | Lion, Bat, Whale, Ostrich |
| C. | Hippopotamus, Penguin, Whale, Kangaroo |
| D. | Whale, Bat, Kangaroo, Hippopotamus |
| Answer» D. Whale, Bat, Kangaroo, Hippopotamus | |
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Explanation: Mammals are members of class Mammalia, air-breathing vertebrate animals characterized by the possession of endothermy, hair, three middle ear bones, and mammary glands functional in mothers with young. Most mammals also possess sweat glands and specialized teeth. The largest group of mammals, the placentals, have a placenta which feeds the offspring during gestation. Among the mammals, pigs, hippopotamus, camels, giraffe, deer, antelope, cattle, sheep, goats belong to Order Artiodactyla; Order Cetacea: whales, dolphins and porpoises; etc. |
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| 1638. |
Which one of the following is NOT a function of kidney - |
| A. | Regulation of blood pH |
| B. | Removal of metabolic wastes from the body |
| C. | Production of antibodies |
| D. | Regulation of osmotic pressures of the blood |
| Answer» C. Production of antibodies | |
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Explanation: Kidneys are essential in the urinary system and also serve homeostatic functions such as the regulation of electrolytes, maintenance of acid-base balance, and regulation of blood pressure Ma maintaining salt and water balance). They serve the body as a natural filter of the blood, and remove wastes which are diverted to the urinary bladder whereas the antibodies are produced by antigens in the cell. |
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| 1639. |
Which is the effect of antigen in an ill person? |
| A. | It increases the production of W.B.C. |
| B. | It increases the production of antibiotics |
| C. | It increases the production of antiserum against bacteria |
| D. | It prevents the growth of bacteria |
| Answer» B. It increases the production of antibiotics | |
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Explanation: Vaccines containing antigens are introduced into the body, stimulating the immune system response by instructing B cells, with assistance from T cells, to produce antibodies. Antibodies are produced to fight the weakened or dead viruses in the vaccine. The immune system prepares to destroy real and stronger vinises in the future. When new antigens enter the body, white blood cells called macrophages engulf them; process the information contained in the antigens, and send it to the T cells so that an immune system response can be mobilized. |
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| 1640. |
Which of the following is true? |
| A. | DNA is the genetic material in most of the organism |
| B. | RNA is the genetic material in most viruses and bacteria |
| C. | DNA is the genetic material in all the viruses |
| D. | RNA is the genetic material in all the viruses |
| Answer» A. DNA is the genetic material in most of the organism | |
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Explanation: Deoxyribonucleic acid (DNA) molecules are informational molecules encoding the genetic instructions used in the development and functioning of all known living organisms and many viruses. DNA is one of the three major macromolecules that are essential for all known forms of life. Genetic information is encoded as a sequence of nucleotides (guanine, adenine, thymine, and cytosine) recorded using the letters. G, A, T, and C. DNA is well-suited for biological information storage. |
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| 1641. |
Which of the following is incorrect? |
| A. | AIDS is retroviral disease |
| B. | AIDS is transmitted by ho*mo and hetero- sexual contact |
| C. | AIDS was first recognised in USA in 1981 |
| D. | AIDS causes ono-genital warts |
| Answer» D. AIDS causes ono-genital warts | |
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Explanation: Warts are benign proliferations of skin and mucosa caused by the human papillomavirus (HPV). Currently, more than 100 types of HPV have been identified. Certain HPV types tend to infect skin at particular anatomic sites; however, warts of any HPV type may occur at any site. The primary clinical manifestations of HPV infection include common warts, genital warts, flat warts, and deep palmoplantar warts (myrmecia). Less common manifestations of HPV infection include focal epithelial hyperplasia (Heck disease),, epidermodysplasia ven-uciformis, and plantar cysts. |
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| 1642. |
Mitosis is a type of cell division in which - |
| A. | The chromosomes maintain their original number |
| B. | The chromosome number is reduced to half |
| C. | The Chromosome number is doubled |
| D. | The chromosome number is reduced to one fourth |
| Answer» C. The Chromosome number is doubled | |
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Explanation: 0 |
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| 1643. |
The danger signals are red while the eye is more sensitive to yellow because – |
| A. | absorption in red is less than yellow and hence red is visible from a distance |
| B. | scattering in yellow light is less than red |
| C. | the wavelength of red light is more than yellow light |
| D. | none of the above reasons |
| Answer» C. the wavelength of red light is more than yellow light | |
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Explanation: 0 |
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| 1644. |
Hashish is obtained from aplant. From which part of the plant is it obtained? |
| A. | Leaves |
| B. | Stem |
| C. | Exudate from leaves and female inflorescences. |
| D. | Exudate from stem and male inflorescences. |
| Answer» C. Exudate from leaves and female inflorescences. | |
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Explanation: Hashish, often known as "hash", is a cannabis preparation composed of compressed and/or purified preparations of stalked resin glands, called trichomes, collected from the unfertilized buds of the cannabis plant. Hashish is made from cannabinoid-rich glandular hairs known as trichomes, as well as varying amounts of cannabis flower and leaf fragments. The flowers of a mature female plant contain the most trichomes, though trichomes are found on other parts of the plant. Certain strains of cannabis are cultivated specifically for their ability to produce large amounts of trichornes. |
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| 1645. |
A test tube baby means : |
| A. | a baby grown in a test tube. |
| B. | embryo fertilised in uterus and developed in test tube. |
| C. | embryo fertilised and developed in uterus. |
| D. | fertilisation in vitro and then transplantation in the uterus. |
| Answer» D. fertilisation in vitro and then transplantation in the uterus. | |
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Explanation: In vitro fertilisation is a process by which an egg is fertilised by sperm outside the body: in vitro. IVF is a major treatment for infertility when other methods of assisted reproductive technology have failed. The process involves monitoring a woman's ovulatory process, removing ovum or ova (egg or eggs) from the woman's ovaries and letting sperm fertilize them in a fluid medium in a laboratory. When a woman's natural cycle is monitored to collect a naturally selected ovum (egg) for fertilisation, it is known as natural cycle IVF. |
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| 1646. |
Why radiologists do not take direct X- ray photographs of intestine? |
| A. | Intestines are affected by direct exposure to X-rays |
| B. | X-rays can not cross intestine |
| C. | X-rays are not able to capture clear picture |
| D. | Even short exposure of X-rays causes cancer in intestine |
| Answer» C. X-rays are not able to capture clear picture | |
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Explanation: As the intestine is a soft tissue structure, it is not usually seen on a plain X-ray. By using barium to coat the inner lining of this area the Radiologist can see the bowel clearly on the X-ray screen, and can watch the way it functions during this study. A small lubricated plastic tube will be inserted through your nostril or mouth and down into your stomach by the Doctor or Nurse. |
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| 1647. |
What is an antibiotic? |
| A. | A chemical compound produced by a living organism that inhibits the growth of other organisms |
| B. | Acompound synthesised by a living organism that inhibits the growth of microbes |
| C. | Asynthetic compound inhibiting the growth of other organisms |
| D. | Asynthetic compound inhibiting the growth of bacteria |
| Answer» D. Asynthetic compound inhibiting the growth of bacteria | |
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Explanation: Antibiotics, also known as antimicrobial drugs, are drugs that fight infections caused by bacteria. Alexander Fleming discovered the first antibiotic, penicillin, in 1927. The term "antibiotic" originally referred to a natural compound produced by a fungus or another microorganism that kills bacteria which cause disease in humans or animals. Some antibiotics may be synthetic compounds (not produced by microorganisms) that can also kill or inhibit the growth of microbes. |
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| 1648. |
Triple vaccine is administered to a new born child to immunize it against - |
| A. | whooping cough, tetanus and measles |
| B. | whooping cough, tetanus and diphtheria |
| C. | tetanus, diphtheria, measles and rubella |
| D. | tetanus, diphtheria, small pox and rubella |
| Answer» B. whooping cough, tetanus and diphtheria | |
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Explanation: Triple Antigen vaccine is a combination of Diphtheria, Tetanus, and Pertussis (whooping cough). The vaccine stimulates the production of antibodies to immunize the body against the causative agents of the three viruses listed above. It is recommended to children older than 2 months of age. |
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| 1649. |
Antidiuretic hormone (ADH) - |
| A. | inhibits the secretion of growth hormone by the pituitary |
| B. | inhibits the rate of heart beat |
| C. | causes the muscular walls of the arterioles to contract that simulates the reabsorption of water from the kidney tubules |
| D. | causes an increase in the blood pressure |
| Answer» C. causes the muscular walls of the arterioles to contract that simulates the reabsorption of water from the kidney tubules | |
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Explanation: 0 |
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| 1650. |
Exobiology deals with the study of - |
| A. | external characters of living organisms |
| B. | life on the surface of the earth |
| C. | life in the outer layers of atmosphere |
| D. | life in other planets and space |
| Answer» D. life in other planets and space | |
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Explanation: Exobiology is the branch of science that deals with the possibility and likely nature of life on other planets or in space. The primary goal of exobiological research is to reach a better understanding of the processes leading to the origin evolution and distribution of life on Earth or elsewhere in the universe. |
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