McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: General Knowledge (GK) .
| 701. |
A plant with fibrous root system is – |
| A. | Wheat |
| B. | Pea |
| C. | Mustard |
| D. | Bean |
| Answer» A. Wheat | |
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Explanation: A fibrous root system (sometimes also called adventitious root system) is the opposite of a taproot system. It is usually formed by thin, moderately branching roots growing from the stem. A fibrous root system is universal in monocotyledonous plants and ferns. Grass, bamboo, banana, rice, wheat, and most of the plants with monocotyledons have fibrous root system. |
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| 702. |
Haemoglobin is a – |
| A. | protein |
| B. | carbohydrate |
| C. | fat |
| D. | vitamin |
| Answer» A. protein | |
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Explanation: Hemoglobin is the iron- containing oxygen-transport metal-protein in the red blood cells of all vertebrates which carries oxygen from the respiratory organs (lungs or gills) to the rest of the body (i.e, the tissues) where it releases the oxygen to burn nutrients to provide energy to power the functions of the organism, and collects the resultant carbon dioxide to bring it back to the respiratory organs to be dispensed from the organism. |
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| 703. |
Why death of fish is more common during summer than in winter? It is because of – |
| A. | shortage of food |
| B. | concentration of toxins |
| C. | depletion of oxygen |
| D. | spread of diseases |
| Answer» C. depletion of oxygen | |
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Explanation: Fish die more in summer due to oxygen depletion which refers to low levels ofdissolved oxygen (DO) in water. Warm water is much less capable of holding oxygen has in solution than cool water. For example, water that is 900 F can only hold 7.4 mg/L DO at saturation, whereas water that is 450 F can hold 11.9 mg/L DO at saturation. This physical phenomenon puts the fish in double jeopardy because at high water temperatures their metabolic rates increase, hence their physiologic demand for oxygen increases. |
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| 704. |
Which of the following groups of organisms reproduce faster? |
| A. | Algae |
| B. | Fungi |
| C. | Bacteria |
| D. | Protozoa |
| Answer» C. Bacteria | |
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Explanation: Unlike in multicellular organisms, increases in cell size (cell growth and reproduction by cell division) are tightly linked in unicellular organisms. Bacteria grow to a fixed size and then reproduce through binary fission, a form of asexual reproduction. Under optimal conditions, bacteria can grow and divide extremely rapidly, and bacterial populations can double as quickly as every 9.8 minutes. |
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| 705. |
Normal blood pressure of man is – |
| A. | 80/120 mm Hg |
| B. | 90/140 mm Hg |
| C. | 120/160 mm Hg |
| D. | 85/150 mm Hg |
| Answer» A. 80/120 mm Hg | |
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Explanation: Normal blood pressure is considered to be at or below 120 over 80 (120/80). |
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| 706. |
Which of the following stores glycogen? |
| A. | Spleen |
| B. | Pancreas |
| C. | Gastric glands |
| D. | Liver |
| Answer» D. Liver | |
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Explanation: Glycogen, the major reservoir of carbohydrate in the body, is comprised of long chain polymers of glucose molecules. The body stores approximately 450-550 grams of glycogen within the muscle and liver for use during exercise. At higher exercise intensities, glycogen becomes the main fuel utilized. Depletion of liver glycogen has the consequence of diminishing liver glucose output, and blood glucose concentrations accordingly. |
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| 707. |
The form of carbohydrate which is synthesized in plants is – |
| A. | Starch |
| B. | Glucose |
| C. | Fructose |
| D. | Cellulose |
| Answer» B. Glucose | |
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Explanation: Carbohydrates are initially synthesized in plants from a complex series of reactions involving photosynthesis. The simplified version of this chemical reaction is to utilize carbon dioxide molecules from the air and water molecules and the energy from the sun to produce a simple sugar such as glucose and oxygen molecules as a byproduct. |
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| 708. |
Which of the following diseases is caused by a virus? |
| A. | Influenza |
| B. | Pneumonia |
| C. | Cholera |
| D. | Whooping cough |
| Answer» A. Influenza | |
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Explanation: Influenza, commonly known as the 'flue, is an infectious disease of birds and mammals caused by RNA viruses. The most common symptoms are chills, fever, sore throat, muscle pains, headache (often severe), coughing, weakness /fatigue and general discomfort. Typically, influenza is transmittedthrough the air by coughs or sneezes, creating aerosols containing the virus. |
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| 709. |
From which part of a plant is turmeric obtained? |
| A. | Root |
| B. | Stem |
| C. | Fruit |
| D. | Flower |
| Answer» B. Stem | |
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Explanation: Turmeric is the rhizome or underground stern of a ginger-like plant. The whole turmeric is a tuberous rhizome, with a rough, segmented skin. |
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| 710. |
Genes, the hereditary units, are located in the – |
| A. | nuclear membrane |
| B. | chromosomes |
| C. | lysosomes |
| D. | cell membrane |
| Answer» B. chromosomes | |
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Explanation: A chromosome is an organized structure of DNA and protein found in cells. It is a single piece of coiled DNA containing many genes, regulatory elements and other nucleotide sequences. Chromosomal DNA encodes most or all of an organism's genetic information; some species also contain plasrnids or other extra- chromosomal genetic elements. |
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| 711. |
Which of these is a modified underground stem? |
| A. | Radish |
| B. | Carrot |
| C. | Sweet Potato |
| D. | Potato |
| Answer» D. Potato | |
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Explanation: Underground stems are modified plant structures that derive from stem tissue but exist under the soil surface. Seedlings develop two structures or axes of growth, one that develops upward out of the soil, called stems, and structures that develop downward which arecalled roots. Potato is such a modified underground stern. |
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| 712. |
The food conducting tissue of a plant is |
| A. | Phloem |
| B. | Xylem |
| C. | Parenchyma |
| D. | Collenchyma |
| Answer» A. Phloem | |
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Explanation: In vascular plants, phloem is the living tissue that carries organic nutrients, in particular, sucrose, a sugar, to all parts of the plant where needed. In trees, the phloem is the innermost layer of the bark. The phloem is concerned mainly with the transport of soluble organic material made during photosynthesis. This is called translocation. |
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| 713. |
Opium is a plant product obtained from – |
| A. | dried leaves |
| B. | dried latex |
| C. | roots |
| D. | stem bark |
| Answer» B. dried latex | |
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Explanation: Opium is the dried latex obtained from the opium poppy. Opium contains approximately 12% morphine, an alkaloid, which is frequently processed chemically to produce heroin for the illegal drug trade. The latex also includes codeine and non-narcotic alkaloids such as papaverine, thebaine and noscapine. |
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| 714. |
Drying oils contain a fairly large proportion of – |
| A. | fats |
| B. | proteins |
| C. | saturated fatty acids |
| D. | unsaturated fatty acids |
| Answer» D. unsaturated fatty acids | |
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Explanation: They contain a high percentage of "polyunsaturates" (polyunsaturated fatty acids). Most drying oils owe their drying properties tothe presence of a large percentage of linolenic acid (which derives its name from "linseed"), which is highly unsaturated. |
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| 715. |
Crabs belongs to the phylum – |
| A. | Mollusca |
| B. | Cnidaria |
| C. | Arthropoda |
| D. | Platyhelminthes |
| Answer» C. Arthropoda | |
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Explanation: Crabs come from the same family as lobsters, crayfish, shrimp, krill and barnacles, as all are in the subphylum crustacea. They are also in the phylum Arthropoda. |
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| 716. |
Clove is a – |
| A. | Dried flower bud |
| B. | Flower |
| C. | Fruit |
| D. | Seed |
| Answer» A. Dried flower bud | |
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Explanation: A bud is a structure on a plant, often round, that encloses an undeveloped flower or leaf. All buds can be harvested and dried; some are used as spices. |
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| 717. |
Dormancy period of animals during winter season is called – |
| A. | Aestivation |
| B. | Hibernation |
| C. | Regeneration |
| D. | Mutation |
| Answer» B. Hibernation | |
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Explanation: Hibernation is a state of inactivity and metabolic depression in endotherms. Hibernation refers to a season of heterothermy that is characterized by low body temperature, slow breathing and heart rate, and low metabolic rate. Often associated with cold temperatures, the purpose of hibernation is to conserve energy during a period when sufficient food is scarce. |
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| 718. |
Breeding and management of bees is known as – |
| A. | Sericulture |
| B. | Silviculture |
| C. | Pisciculture |
| D. | Apiculture |
| Answer» D. Apiculture | |
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Explanation: Beekeeping (or apiculture, from Latin api8, bee) is the maintenance of honey bee colonies, commonly in hives, by humans. A beekeeper (or apiarist) keeps bees in order to collect honey and other products of the hive (including beeswax, propolis, pollen, and royal jelly), to pollinate crops, or to produce bees for sale to other beekeepers. |
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| 719. |
Which one of the following is not a constituent of biogas? |
| A. | Methane |
| B. | Carbon dioxide |
| C. | Hydrogen |
| D. | Nitrogen dioxide |
| Answer» D. Nitrogen dioxide | |
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Explanation: Nitrogen dioxide is not a component of biogas. Biogas is produced under anaerobic conditions; the process is denominated as anaerobic digestion. The major constituent of biogas is methane (55-70%), CO2 (30-45%) and some traces of gases such as H2S and ammonia. |
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| 720. |
Which one of the following is the best source of vitamin A? |
| A. | Apple |
| B. | Carrot |
| C. | Amla |
| D. | Raddish |
| Answer» B. Carrot | |
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Explanation: The top sources of pro vitamin A include carrots, broccoli, cantaloupe, and squash. |
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| 721. |
Which one of the following glands is responsible for secretion of sex hormones? |
| A. | Adrenal gland |
| B. | Thyroid gland |
| C. | Pituitary gland |
| D. | Sebaceous gland |
| Answer» C. Pituitary gland | |
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Explanation: The pituitary is sometimes referred to as the "master gland" as it controls hormone functions such as our temperature, thyroid activity, growth during childhood, urine production, testosterone production in males and ovulation and estrogen production' in females. |
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| 722. |
In cauliflower plant the useful part is : |
| A. | Underground stem |
| B. | Root |
| C. | Young inflorescence |
| D. | Leaves |
| Answer» C. Young inflorescence | |
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Explanation: Cauliflowers are characterized mainly by their heart which consists of an inflorescence composed of numerous undeveloped flowers that gather around a central axis. Cauliflower and broccoli are grown for their large, edible, very young inflorescence. |
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| 723. |
A man suffering from diabetes mellitus drinks water more frequently as he has to eliminate from the blood extra |
| A. | glucose |
| B. | insulin |
| C. | glucagon |
| D. | salt |
| Answer» A. glucose | |
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Explanation: The diabetic person has higher sugar in blood. Glucose is a form of sugar. |
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| 724. |
Jaws are absent in – |
| A. | Birds |
| B. | Fishes |
| C. | Protochordates |
| D. | Reptiles |
| Answer» C. Protochordates | |
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Explanation: Jaws are absent in Protochordates. |
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| 725. |
Which of the following is a true fish? |
| A. | Silver fish |
| B. | Star fish |
| C. | Dog fish |
| D. | Shell fish |
| Answer» C. Dog fish | |
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Explanation: 0 |
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| 726. |
Which of the following micro- organisms is used in milk curdli – |
| A. | Acetobacter |
| B. | Leticonost |
| C. | Bacillus |
| D. | Lactobacillus |
| Answer» D. Lactobacillus | |
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Explanation: Lactobacillus is used in milk curdling. It is a genus of Gram positive facultative anaerobic or microaciophilic rod- shaped bacteria. |
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| 727. |
Which of the following is present In Chlorophyll molecule? |
| A. | Win |
| B. | Mg |
| C. | Fe |
| D. | K |
| Answer» B. Mg | |
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Explanation: Chlorophyll is the green pigment found in most plants, responsible for light absorption to provide energy by photosynthesis. Magnesium is the sole metallic constituent of the chlorophyll. |
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| 728. |
The ambient air quaility standard (24 hours' average) for lead in industrial area is |
| A. | 0.65 pg/m3 |
| B. | 0/5 pg/m3 |
| C. | 1.0 pg/m3 |
| D. | 1.5 pg/m3 |
| Answer» D. 1.5 pg/m3 | |
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Explanation: The ambient air quality standard (24 hours' average) for lead in industrial area is 1.5 pg/m3 |
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| 729. |
Thinner particles responsible for deteriorating the air quality resulting in the damage of vital body organs are referred as PM: |
| A. | 15.5 |
| B. | 10.5 |
| C. | 2.5 |
| D. | 20.5 |
| Answer» C. 2.5 | |
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Explanation: The term fine particles, or particulate matte: 2.5 (PM25), refers to tiny particles or droplets in the air that are two and one half microns or less in width. Particles in the PM25 size range are able to travel deeply into the respiratory tract, reaching the lungs. Exposure to fine particles can cause short-term health effects such as eye, nose, throat and lung irritation, coughing, sneezing, runny nose and shortness of breath. Exposure to fine particles can also affect lung function and worsen medical conditions such as asthma and heart disease. |
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| 730. |
Sams crane is the state bird of – |
| A. | Rajasthan |
| B. | Uttar Pradesh |
| C. | Madhya Pradesh |
| D. | West Bengal |
| Answer» B. Uttar Pradesh | |
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Explanation: The Sarus Crane is the state bird of Uttar Pradesh. These birds have always been known to inhabit the state, and even historic epics originating from the state have made references to the species (Leslie 1998). |
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| 731. |
The animal who can consume more salt among the following is – |
| A. | Sheep |
| B. | Camel |
| C. | Donkey |
| D. | Dog |
| Answer» B. Camel | |
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Explanation: Camels require six to eight times the salt intake of other animals. This helps the camel's body to store water in its cells. At an average, camels need a ration of 45-60 grams of salt every day. |
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| 732. |
How many chambers does a mammalian heart have? |
| A. | 4 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» A. 4 | |
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Explanation: Most mammalian hearts are structured similarly to the human heart. There are 4 chambers found within the mammalian heart: the left atrium, right atrium, left ventricle, and right ventricle. |
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| 733. |
The release of which of the following into ponds and wells helps in controlling mosquitoes? |
| A. | Snaii |
| B. | Crab |
| C. | Dogfish |
| D. | Gambusia fish |
| Answer» D. Gambusia fish | |
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Explanation: The Gambusia fish, also known as mosquito fish, feeds on the larvae of mosquitoes. So it helps in controlling their population. Mosquito fish were introduced directly into ecosystems in many parts of the world as a bio- control to lower mosquito populations which in turn negatively affected many other species in each distinct bioregion. |
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| 734. |
The ambient air is stable when the ambient lapse rate is – |
| A. | Neutrally stable |
| B. | Hyper-adiabatic |
| C. | Sub-adiabatic |
| D. | Super-adiabatic |
| Answer» C. Sub-adiabatic | |
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Explanation: 0 |
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| 735. |
In dicots the pollen-grains possess : |
| A. | two germ pores |
| B. | three germ pores |
| C. | four germ pores |
| D. | one germ pore |
| Answer» B. three germ pores | |
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Explanation: Pollen grains of monocots have one opening, while pollen grains of dicots have three openings. Pollengrains can be monocolpate (having one germ pore called germinal furrow e.g., monocots), bicolpate (2 germ pores) and tricolpate (3 germ pores e.g., dicots). |
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| 736. |
Acceptable "Noise Pollution Level" in India range between: |
| A. | 16 - 35 db |
| B. | 40 - 45 db |
| C. | 70 - 100 db |
| D. | 10 - 15 db |
| Answer» B. 40 - 45 db | |
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Explanation: According to the noise pollution rules, the permissible noise level during the day is 50dB in silence zones, 55dB in residential areas, 65 dB in commercial areas and 75 dB in industrial areas. The night time permissible levels for silence zones, residential areas,commercial areas and industrial areas are respectively 40 dB, 45 dB, 55 dB and 70 dB. |
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| 737. |
An example of protein which acts as a hormone is : |
| A. | nypsin |
| B. | Oxytocin |
| C. | Keratin |
| D. | Casein |
| Answer» B. Oxytocin | |
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Explanation: Hormonal Proteins are messenger proteins which help to coordinate certain bodily activities. Examples include Insulin, Oxytocin, and Somatotropin. Oxytocin stimulates contractions in females during childbirth. |
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| 738. |
The primary producer in an ecosystem are; |
| A. | Women |
| B. | Men |
| C. | Plants |
| D. | Bacteria |
| Answer» C. Plants | |
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Explanation: Primary producers are the organisms in an ecosystem that produce biomass from inorganic compounds (au totrophs). In almost all cases these are photosyni helically active organisms (plants, cyanobacteria and a number of other unicellular organisms. |
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| 739. |
White Revolution' is related to – |
| A. | Wheat production |
| B. | Milk production |
| C. | Flood control |
| D. | Fish production |
| Answer» B. Milk production | |
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Explanation: White Revolution is related to enhanced milk production. Verghese Kurien, father of the " White Revolution" and founder of the cooperative dairy movement in. India passed away on September 9, 2012. |
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| 740. |
Metal present in blood is – |
| A. | Calcium |
| B. | Zinc |
| C. | Sodium |
| D. | Iron |
| Answer» D. Iron | |
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Explanation: Iron is an essential part of the proteins that transport oxygen in the body. Hemoglobin, the oxygencanying protein in red blood cells, accounts for about two-thirds of the body's iron supply. Smaller amounts are found in myoglobin, the protein that supplies oxygen to muscles, and in enzymes needed for various biochemical reactions. |
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| 741. |
An adult human normally has – |
| A. | 6 molar teeth |
| B. | 8 molar teeth |
| C. | 10 molar teeth |
| D. | 12 molar teeth |
| Answer» D. 12 molar teeth | |
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Explanation: Molars are the posterior most and most complicated kind of tooth in most mammals. Adult humans have twelve molars, in four groups of three at the back of the mouth. The third, rearmost molar in each group is called a wisdom tooth. |
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| 742. |
Chicken pox is caused by – |
| A. | Protozoa |
| B. | Bacteria |
| C. | Virus |
| D. | Fungus |
| Answer» C. Virus | |
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Explanation: Chickenpox is a highly contagious disease caused by primary infection with varicella zoster virus (VZV), It is an airborne disease spread easily through coughing or sneezing of ill individuals or through direct contact with secretions from the rash. |
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| 743. |
Aquatic animal with the most developed intelligence is – |
| A. | Shark |
| B. | Whale |
| C. | Flying fish |
| D. | Sea horse |
| Answer» A. Shark | |
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Explanation: In terms of brain shape, the shark brain differs a lot from that of mammals and birds. However, in proportion to the body size shark brains usually are similar sized or bigger than those of most mammals and birds, and while arranged in a different way it seems to share the seme level of mental capacity, Some shark species seem to be as intelligent as mammals such as dogs, which is really impressive for a non-tetrapod. |
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| 744. |
The blood vessel which carries oxygenated blood to the liver is – |
| A. | Coronary Artery |
| B. | PulmonawArtety |
| C. | Carotid Artery |
| D. | Hepatic Artery |
| Answer» D. Hepatic Artery | |
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Explanation: In anatomy, the common hepatic artery is a short blood vessel that supplies oxygenated blood to the liver, pylorus (a part of the stomach), duodenum (a part of the small intestine) and pancreas. |
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| 745. |
Bile is stored in the – |
| A. | Gall - bladder |
| B. | Duodenum |
| C. | Liver |
| D. | Spleen |
| Answer» A. Gall - bladder | |
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Explanation: Bile is a digestive juice that is a greenish-yellow liquid produced by the liver and stored in the gallbladder. Upon eating it is discharged into the duodenum. |
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| 746. |
The saliva secreted in the mouth digests |
| A. | Proteins |
| B. | Starch |
| C. | Fats |
| D. | Vitamins |
| Answer» B. Starch | |
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Explanation: The enzymes found in saliva are essential in beginning the process of digestion of dietary starches and fats. These enzymes also play a role in breaking down food particles entrapped within dental crevices, protecting teeth from bacterial decay. |
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| 747. |
Which of the following animals has a clitellum? |
| A. | Millipede |
| B. | Centipede |
| C. | Earthworm |
| D. | Ringworm |
| Answer» C. Earthworm | |
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Explanation: A clitellum is part of a of the reproductive system of clitellates, a subgroup of annelids which contains oligochaetes (earthworms) and hirudineans (leeches). The clitellum is a thick, saddle-like, ring found in the epidermis (skin) of the worm, usually with a light colored pigment. To form a cocoon for its eggs, the clitellum secretes a viscous fluid. |
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| 748. |
The number of chromosomes present in the somatic cell of the human cell is - |
| A. | 23 |
| B. | 44 |
| C. | 46 |
| D. | 92 |
| Answer» C. 46 | |
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Explanation: Human cells have 23 pairs of chromosomes (22 pairs of autosomes and one pair of sex chromosomes), giving a total of 46 per cell. |
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| 749. |
Ecology deals with: |
| A. | Birds |
| B. | Cell formation |
| C. | Relation between organisms and their environment |
| D. | Tissues |
| Answer» C. Relation between organisms and their environment | |
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Explanation: Ecology is the branch of biology which studies the interactions among organisms and their environment. |
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| 750. |
What is the total number of bones that are present in human body? |
| A. | 309 |
| B. | 405 |
| C. | 103 |
| D. | 206 |
| Answer» D. 206 | |
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Explanation: The human skeleton is the internal framework of the body. It is composed of around 270 bones at birth this total decrease to around 206 bones by adulthood after some bones get fused together. |
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