McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: General Knowledge (GK) .
| 601. |
Which part of the nervous system controls the activities of internal organs? |
| A. | Spinal cord |
| B. | Cerebrum |
| C. | Cerebellum |
| D. | Medulla Oblongata |
| Answer» D. Medulla Oblongata | |
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Explanation: The medulla oblongata is a portion of the hindbrain that controls autonomic functions such as breathing, digestion, heart and blood vessel function, swallowing and sneezing. Motor and sensory neurons from the midbrain and forebrain travel through the medulla. |
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| 602. |
The antibiotic Ampicillin is - |
| A. | a synthetic drug |
| B. | obtained from a bacterium |
| C. | obtained from a plant extract |
| D. | a semi-synthetic drug |
| Answer» B. obtained from a bacterium | |
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Explanation: Ampicillin is an antibiotic made from bacteria. Belonging to the penicillin group of beta-lactam antibiotics, ampicillin is able to penetrate Gram-positive and some Gram- negative bacteria. It differs from penicillin only by the presence of an amino group. That amino group helps the drug penetrate the outer membrane of gram-negative bacteria. |
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| 603. |
Which among the following blood protein regulates the amount of water in plasma? |
| A. | Globulin |
| B. | Albumin |
| C. | Fibrin |
| D. | Fibulir |
| Answer» B. Albumin | |
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Explanation: 0 |
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| 604. |
How many valves does a human heart have? |
| A. | Four |
| B. | Three |
| C. | Two |
| D. | One |
| Answer» A. Four | |
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Explanation: Human heart has four valves: two atrioventricular (AV) valves, which are between the atria and the ventricles, are the mitral valve and the tricuspid valve; and two semilunar (SL) valves, which are in the arteries leaving the heart, are the aortic valve and the pulmonary valve. A heart valve normally allows blood flow in only one direction through the heart. |
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| 605. |
The cells which are responsible for the production of antibodies are – |
| A. | red blood cells |
| B. | neutrophils |
| C. | lymphocytes |
| D. | platelets |
| Answer» C. lymphocytes | |
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Explanation: An antibody (Ab), also known as an immunoglobulin (Ig), is a large Y-shaped protein produced by B-cells that is used by the immune system to identify and neutralize foreign objects such as bacteria and viruses. Each antibody is produced by lymphocytes (specialized white cells) as a result of exposure to specific chemical substances called antigens usually on the outside of an invading organism. This is called the antigen-antibody reaction. |
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| 606. |
Which of the following branches deals with the interactions of same species of living organisms with their nonliving environment? |
| A. | Autecology |
| B. | Synecology |
| C. | Ecology |
| D. | Palaeontology |
| Answer» C. Ecology | |
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Explanation: Ecology is the scientific study of the relationships that living organisms have with each other and with their natural environment. Ecosystems are composed of dynamically interacting parts including organisms, the communities they make up, and the non-living components of their environment. Ecosystem processes, such as primaly production, pedogenesis, nutrient cycling, and various niche construction activities, regulate the flux of energy and matter through an environment. |
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| 607. |
Which of the following organelles is called 'Atom bombs'? |
| A. | Microtubules |
| B. | Nucleolus |
| C. | Golgi bodies |
| D. | Lysosome |
| Answer» D. Lysosome | |
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Explanation: Lysosomes are known by names such as suicidal bags/ atom bomb and House keeper / scavenger of cell. They are called suicide bags or atom bombs because if the singlemembrane surrounding the digestive enzyme breaks, the enzymes released may also destroy the cell itself. |
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| 608. |
Which of the following causes poliomyelitis? |
| A. | Dengue Virus |
| B. | Entero Virus |
| C. | Mumps Virus |
| D. | Rhabo Virus |
| Answer» B. Entero Virus | |
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Explanation: Poliomyelitis is caused by infection with a member of the genus Enterovirus known as poliovirus (PV). |
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| 609. |
Which one of the following animals is sanguinivorous? |
| A. | Fruit-fly |
| B. | Mosquito |
| C. | House-fly |
| D. | Snail |
| Answer» B. Mosquito | |
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Explanation: The literal meaning of `sanguinivorous' is someone subsisting on a diet of blood. Mosquitoes belong to this category. |
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| 610. |
Functional unit of 'Kidney' – |
| A. | A on |
| B. | Neuron |
| C. | Nephron |
| D. | Artery |
| Answer» C. Nephron | |
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Explanation: Nephron is the basic structural and functional unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine. |
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| 611. |
An invertebrate does not have – |
| A. | Notochord |
| B. | Body cavity |
| C. | Haernocoel |
| D. | Gills |
| Answer» A. Notochord | |
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Explanation: An invertebrate does not have back bone and cell wall |
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| 612. |
Which of the following weeds has been found useful to check water pollution caused by industrial effluents? |
| A. | Partheniurn |
| B. | Elephant grass |
| C. | Water hyacinth |
| D. | Both (1) and (2) |
| Answer» D. Both (1) and (2) | |
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Explanation: Parthenium and Elephant grass are useful to check water pollution caused by industrial effluents. |
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| 613. |
All are protozoan diseases except – |
| A. | Elephantiasis |
| B. | Oriental sores |
| C. | Sleeping sickness |
| D. | Kula-czar |
| Answer» A. Elephantiasis | |
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Explanation: Elephantiasis is caused by the worm Wuchereria bonacrafti. |
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| 614. |
Transfer of genetic information from one generation to the next generation is by - |
| A. | RNA |
| B. | Codon |
| C. | DNA |
| D. | messenger RNA |
| Answer» C. DNA | |
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Explanation: DNA is responsible for transfer of genetic information from one generation to the next generation. |
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| 615. |
An eardrum is absent in – |
| A. | snakes |
| B. | turtles |
| C. | tuatara |
| D. | toads |
| Answer» A. snakes | |
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Explanation: The ear has three main parts: the outer, middle and inner ear. The outer ear consists of the pinna and the auditory canal. The middle ear is filled with air and contains three tiny bones called ossicles the anvil, hammer and stirrup. The inner ear contains the semicircular canals and the cochlea. Eardrum is the membrane of middle ear. Snakes have fully developed inner ear structures but no eardrum. |
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| 616. |
Animals adapted to life in air are called : |
| A. | fossorial |
| B. | arboreal |
| C. | cursorial |
| D. | volant |
| Answer» B. arboreal | |
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Explanation: Animal adapted to life in air are called arboreal. Arboreal means living in or connected with trees. |
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| 617. |
Plants used for the production of biofuel are: |
| A. | Pongamia glabra |
| B. | Jatropa curcus |
| C. | Acacia melanoxylon |
| D. | Azadirachta indica |
| Answer» B. Jatropa curcus | |
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Explanation: Several groups in various sectors are conducting research on Jatropha curcas, a poisonous shrub-like tree that produces seeds considered by many to be a viable source of biofuels. |
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| 618. |
, found in blood, is responsible for oxygen transportation. |
| A. | WBC |
| B. | Platelets |
| C. | RBC |
| D. | Plasma |
| Answer» C. RBC | |
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Explanation: Red Blood Cells (RBCs) are responsible for carrying oxygen and carbon dioxide in the blood. Also known as erythrocytes, they are specialized cells that circulate through the body and deliver oxygen to tissues. |
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| 619. |
Which one of the following is the ideal food for newborn babies? |
| A. | Water |
| B. | Sugar |
| C. | Honey |
| D. | Milk |
| Answer» D. Milk | |
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Explanation: The best food for the newborn baby is mother's milk. |
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| 620. |
Transcription means the synthesis of – |
| A. | Lipids |
| B. | Protein |
| C. | DNA |
| D. | RNA |
| Answer» C. DNA | |
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Explanation: Transcription is the first step of gene expression, in which a particular segment of DNA is copied into RNA by the enzyme, RNA polymerase. During transcription, a DNA sequence is read by an RNA polymerase, which produces a complementary, anti-parallel RNA strand. |
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| 621. |
Approximate life span of parrot is – |
| A. | 20 years |
| B. | 40 years |
| C. | 70 years |
| D. | 140 years |
| Answer» A. 20 years | |
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Explanation: The lifespan of a parrot depends on the species. Smaller types of parrots generally have a lifespan of 15 to 20 years, while some larger varieties can live as long as 80 years. |
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| 622. |
Tendons and ligaments are – |
| A. | Connective tissue |
| B. | Muscular tissue |
| C. | Epithelial tissue |
| D. | Skeletal tissue |
| Answer» A. Connective tissue | |
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Explanation: A tendon is a fibrous connective tissue which attaches muscle to bone. A ligament is a fibrous connective tissue which attaches bone to bone, and usually serves to hold structures together and keep them stable. |
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| 623. |
A plant with 30 cm or more circumference from human chest height is identified as - |
| A. | Herb |
| B. | Shrub |
| C. | Medicinal herbs |
| D. | Tree |
| Answer» C. Medicinal herbs | |
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Explanation: Medicinal herbs grown from 30 to 90 cm in height. They reach up to 30 cm in diameter. 957. |
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| 624. |
The skin biting mosquito has legs as locomotory organ which are – |
| A. | Four pairs |
| B. | Three pairs |
| C. | Two pairs |
| D. | One pair |
| Answer» B. Three pairs | |
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Explanation: Like all other insects, in a mosquito, the thorax is specialized for locomotion. Three pairs of legs and a pair of wings are attached to the thorax. The insect wing is an outgrowth of the exoskeleton. |
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| 625. |
Hydrochloric acid is secreted by the cells lining the – |
| A. | Oral cavity |
| B. | Stomach |
| C. | Ileum |
| D. | Colon |
| Answer» B. Stomach | |
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Explanation: The chief cells of the stomach secrete enzymes for protein breakdown (inactive pepsinogen and rennin). Hydrochloric acid activates pepsinogen into the enzyme pepsin, which then helps digestion by breaking the bonds linking amino acids, a process known as proteolysis. |
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| 626. |
Emulsification is - |
| A. | breaking fats into small globules |
| B. | digestion of fats |
| C. | absorption of fats |
| D. | storage of fats |
| Answer» A. breaking fats into small globules | |
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Explanation: Emulsification is the breakdown of large fat globules into smaller, uniformly distributed particles. It is accomplished mainly by bile acids in the small intestine. Emulsification is the first preparation of fat for chemical digestion by specific enzymes. |
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| 627. |
Which of the following is also known as the Biochemical Laboratory of the Human Body? |
| A. | Small Intestine |
| B. | Brain |
| C. | Pancreas |
| D. | Liver |
| Answer» D. Liver | |
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Explanation: Liver is considered as the biochemical laboratory of the human body. It synthesizes and secretes at least four important hormones and has a wide range of functions, including detoxification of various metabolites, protein synthesis, and the production of biochemicals necessary for digestion. |
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| 628. |
With which of the following body organ is 'pace-maker' associated? |
| A. | Liver |
| B. | Brain |
| C. | Heart |
| D. | Lungs |
| Answer» C. Heart | |
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Explanation: A pacemaker is a small device that's placed in the chest or abdomen to help control abnormal heart rhythms. This device uses low-energy electrical pulses to prompt the heart to beat at a normal rate. Pacemakers are used to treat arrhythmias. |
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| 629. |
The smallest size of a cell that can be seen with naked eye is: |
| A. | 1 micron |
| B. | 10 micron |
| C. | 100 micron |
| D. | 1000 micron |
| Answer» C. 100 micron | |
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Explanation: The smallest objects that can be seen with unaided eye are about 0.1 mm long, which is equal to 100 micrometres. Micron (u) is an alternate name of micrometre. |
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| 630. |
Cosmetic powder is prepared from – |
| A. | Asbestos |
| B. | Talc |
| C. | Gypsum |
| D. | Serpentine |
| Answer» B. Talc | |
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Explanation: Face powder is a cosmetic powder applied to the face to set a foundation after application. There is translucent sheer powder, and there is pigmented powder. |
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| 631. |
Rutherford's scattering experiment proved the presence of – |
| A. | atoms in all matter |
| B. | electrons in atoms |
| C. | neutrons in atoms |
| D. | nucleus in atoms |
| Answer» D. nucleus in atoms | |
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Explanation: On the basis of his experiment, Rutherford put forward the model of an atom, which had the following features: There is apositively charged centre in an atom called the nucleus. |
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| 632. |
Which of the following does not cause pollution? |
| A. | Burning of petrol |
| B. | Use of solar energy |
| C. | Burning of rubber |
| D. | All of the above |
| Answer» B. Use of solar energy | |
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Explanation: Use of solar energy does not cause pollution. |
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| 633. |
Excess amount of absorbed water by plants is liberated out by – |
| A. | Evaporation |
| B. | Osmosis |
| C. | Diffusion |
| D. | Transpiration |
| Answer» D. Transpiration | |
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Explanation: Water vapour transpires constantly through pores (stomata) in the surface of plant's leaves. |
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| 634. |
The life span of RBC of man is - |
| A. | 120 days |
| B. | 150 days |
| C. | 180 days |
| D. | 190 days |
| Answer» B. 150 days | |
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Explanation: The average life span of RBC is about 100-120 days. The old, worn out and dead RBC are destroyed mainly in an organ called spleen. |
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| 635. |
The communication between the central nervous system and the other parts of the body is facilitated by - |
| A. | Peripheral Nervous System |
| B. | Central Nervous System |
| C. | Both are correct |
| D. | Both are incorrect |
| Answer» A. Peripheral Nervous System | |
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Explanation: The peripheral nervous system consists of cranial nerves arising from the brain and spinal nerves arising from the spinal cord. The brain thus allows us to think and take actions based on that thinking. |
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| 636. |
Which of the following disease is not affected by bacteria? |
| A. | Anthrax |
| B. | T.B. |
| C. | Rubella |
| D. | Cholera |
| Answer» C. Rubella | |
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Explanation: Rubella, also known as German measles or three-day measles, is an infection caused by the rubella virus. |
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| 637. |
From the bark of which plant is quinine extracted? |
| A. | Eucalyptus |
| B. | Cinchona |
| C. | Neem |
| D. | Cedar |
| Answer» B. Cinchona | |
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Explanation: Quinine, as a component of the bark of the cinchona tree, was used to treat malaria from as early as the 1600s. The bark of trees in this genus is the source of a variety of alkaloids, the most familiar of which is quinine, an antipyretic (anti-fever) agent. |
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| 638. |
Hypertension is the term used for – |
| A. | increase in heart rate |
| B. | decrease in heart rate |
| C. | decrease in blood pressure |
| D. | increase in blood pressure |
| Answer» D. increase in blood pressure | |
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Explanation: Hypertension is a chronic medical condition in which the blood pressure in the arteries is elevated. This requires the heart towork harder than normal to circulate blood through the blood vessels. |
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| 639. |
The source of the enzyme, diastase is – |
| A. | salivary gland |
| B. | stomach |
| C. | liver |
| D. | pancreas |
| Answer» A. salivary gland | |
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Explanation: Diastase was the very first enzyme discovered. This enzyme helps break down carbohydrates and turn them into sugar, which makes them easier to digest. It is found in such sources as milk, saliva and other plants. |
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| 640. |
Mycoplasma is associated with a disease that affects the organs of - |
| A. | respiration |
| B. | excretion |
| C. | reproduction |
| D. | digestion |
| Answer» A. respiration | |
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Explanation: Mycoplasma refers to a genus of bacteria that lack a cell wall. Several species are pathogenic in humans, including M. pneumoniae, which is an important cause of pneumonia (an inflammatory condition of the lung—affecting primarily the microscopic air sacs known as alveoli) and other respiratory disorders, and M. genitalium, which is believed to be involved in pelvic inflammatory diseases. |
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| 641. |
Which one of the following is a hereditary disease? |
| A. | Cataract |
| B. | Haemophilia |
| C. | Pellagra |
| D. | Osteoporosis |
| Answer» B. Haemophilia | |
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Explanation: In this instance, a specific gene from one or both parents leads to an abnormality.Examples of such a condition would be sickle cell anemia, cystic fibrosis, or hemophilia. |
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| 642. |
In how many parts is the human brain divided? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |
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Explanation: The human brain is divided into three parts: The brainstem which has the pons, the midbrain, and the medulla oblongata |
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| 643. |
The total number of bones in the body of an adult human is . |
| A. | 205 |
| B. | 206 |
| C. | 216 |
| D. | 636 |
| Answer» B. 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 decreases to around 206 bones by adulthood after some bones get fused together. |
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| 644. |
The floral part that produces pollen grains is |
| A. | Sepal |
| B. | Petal |
| C. | Anther |
| D. | Ovary |
| Answer» C. Anther | |
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Explanation: The anther contains microsporangia. Each microsporangium contains pollen mother cells. These undergo meiosis, and produce pollen grains, which contain the male gametes (sperm). The pollen is released by the opening of the anther. |
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| 645. |
Which of these fruits develop from an inflorescence? |
| A. | Apple |
| B. | Guava |
| C. | Pineapple |
| D. | Grape |
| Answer» C. Pineapple | |
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Explanation: Pineapple is a perennial monocotyledonous plant having a terminal inflorescence and a terminal multiple fruit. The vegetative meristem produces leaves which becomes and inflorescence meristem. The |
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| 646. |
When day light hours are increased, the rate of photosynthesis: |
| A. | Increase |
| B. | Decrease |
| C. | Remains same |
| D. | None of the above |
| Answer» C. Remains same | |
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Explanation: When day light hours are increased, the rate of photosynthesis remains unchanged. |
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| 647. |
Which of the following is a biodegradable waste? |
| A. | Wool |
| B. | Polythene bags |
| C. | Plastics |
| D. | Nylon |
| Answer» A. Wool | |
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Explanation: 0 |
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| 648. |
Persons who are colour-blind cannot distinguish between – |
| A. | yellow and white |
| B. | green and blue |
| C. | red and green |
| D. | black and yellow |
| Answer» C. red and green | |
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Explanation: A person with colour-blindness has trouble seeing red, green, blue, or mixtures of these colours. The most common type is red- green colours - blindness, where red and green are as the same colour. |
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| 649. |
The acid present in gastric juice is – |
| A. | Hydrochloric |
| B. | Nitric |
| C. | Sulphuric |
| D. | Ascorbic |
| Answer» A. Hydrochloric | |
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Explanation: Gastric glands within the stomach produce secretions called gastric juice. Hydrochloric acid (HCl) converts pepsinogen to pepsin hich breaks down proteins to peptides. |
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| 650. |
Housefly spreads – |
| A. | Common cold |
| B. | Malaria |
| C. | Flu |
| D. | Typhoid |
| Answer» D. Typhoid | |
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Explanation: House flies are strongly suspected of transmitting at least 65 diseases to humans, including typhoid fever, dysentery, cholera, poliomyelitis, yaws, anthrax, tularemia, leprosy and tuberculosis. Flies regurgitate and excrete wherever they come to rest and thereby mechanically transmit disease organisms. |
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