MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Universal blood recipient is |
| A. | blood group O |
| B. | blood group AB |
| C. | blood group A |
| D. | blood group B |
| Answer» C. blood group A | |
| 2. |
Which of the following organs can be called as a sort of "blood bank"? |
| A. | Lungs |
| B. | Heart |
| C. | Liver |
| D. | Spleen |
| Answer» E. | |
| 3. |
Percentage of oxygen supplied by haemoglobin is |
| A. | 97% |
| B. | 100% |
| C. | 49% |
| D. | 3% |
| Answer» B. 100% | |
| 4. |
Functional and structural unit of kidney is |
| A. | nephron |
| B. | seminiferous tubule |
| C. | acini |
| D. | None of these |
| Answer» B. seminiferous tubule | |
| 5. |
Neurons receive signals through their _______ and send signals to other neurons through their_______. |
| A. | dendrites ... receptors |
| B. | end feet... cell bodies and dendrites |
| C. | cell bodies and dendrites... axons |
| D. | transmitter vesicles ... axons |
| Answer» D. transmitter vesicles ... axons | |
| 6. |
Which of the following disease is not concerned with disorders of circulatory system? |
| A. | Heart failure |
| B. | Angina |
| C. | Coronary artery disease |
| D. | Uremia |
| Answer» E. | |
| 7. |
Air is breathed through |
| A. | Trachea - lungs - larynx - pharynx - alveoli |
| B. | Nose - larynx - pharynx - bronchus - alveoli -bronchioles |
| C. | Nostrils - pharynx - larynx - trachea - bronchi -bronchioles - alveoli |
| D. | Nose - mouth - lungs |
| Answer» D. Nose - mouth - lungs | |
| 8. |
Antibodies are |
| A. | carbohydrates |
| B. | immune globulins |
| C. | globular proteins |
| D. | extrinsic proteins |
| Answer» C. globular proteins | |
| 9. |
Which one of the following organs in the human body is most affected due to shortage of oxygen? |
| A. | Intestine |
| B. | Skin |
| C. | Kidney |
| D. | Brain |
| Answer» E. | |
| 10. |
Child death may occur in the marriage between |
| A. | \[R{{h}^{+}}\]man and \[R{{h}^{+}}\]woman |
| B. | \[R{{h}^{+}}\] man and \[R{{h}^{-}}\] woman |
| C. | \[R{{h}^{-}}\] man and R woman |
| D. | \[R{{h}^{-}}\] man and \[R{{h}^{+}}\] woman |
| Answer» C. \[R{{h}^{-}}\] man and R woman | |
| 11. |
Melatonin is produced by |
| A. | thymus |
| B. | skin |
| C. | pituitary |
| D. | pineal gland |
| Answer» E. | |
| 12. |
In which of the following reptiles four chambered heart is present? |
| A. | Lizard |
| B. | Snake |
| C. | Scorpion |
| D. | Crocodile |
| Answer» E. | |
| 13. |
The food that gives more calories per unit mass of food is |
| A. | protein |
| B. | carbohydrates |
| C. | fat |
| D. | water |
| Answer» D. water | |
| 14. |
Which part of the alimentary canal does not secrete any enzyme? |
| A. | Mouth |
| B. | Oesophagus |
| C. | Stomach |
| D. | Duodenum |
| Answer» C. Stomach | |
| 15. |
From a cross AABb x aaBb, the genotypes AaBB: AaBb: Aabb: aabb will be obtained in the following ratio |
| A. | 1:1:1:1 |
| B. | 1:2:1:0 |
| C. | 0:3:1:0 |
| D. | 1:1:1:0 |
| Answer» C. 0:3:1:0 | |
| 16. |
How many pairs of contrasting characters in pea pod were chosen by Mendel? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 7 |
| Answer» E. | |
| 17. |
How many different kinds of gametes will be produced by a plant having the genotype AABbCC? |
| A. | Nine |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» C. Three | |
| 18. |
In Down's syndrome of a male child, the sex complement is |
| A. | XO |
| B. | XY |
| C. | XX |
| D. | XXY |
| Answer» C. XX | |
| 19. |
Which of the following is not a part of Darwin's theory of evolution? |
| A. | Genetic drift |
| B. | Natural selection |
| C. | Survival of the fittest |
| D. | Struggle for existence |
| Answer» B. Natural selection | |
| 20. |
According to special creation theory the earth is about |
| A. | 4000 yrs old |
| B. | 4.5 M yrs old |
| C. | 4.5 B yrs old |
| D. | 10000 yrs old |
| Answer» B. 4.5 M yrs old | |
| 21. |
The two strands of DNA are held together by |
| A. | peptide bonds |
| B. | phosphodiester bonds |
| C. | hydrogen bonds |
| D. | S - S bonds |
| Answer» D. S - S bonds | |
| 22. |
The first organisms were |
| A. | Chemoautotrophs |
| B. | Chemo heterotrophs |
| C. | Autotrophs |
| D. | Eukaryotes |
| Answer» C. Autotrophs | |
| 23. |
Genetic variation in a population arises due to |
| A. | Mutations only |
| B. | Recombination only |
| C. | Mutations as well as recombination |
| D. | Reproductive isolation and selection |
| Answer» D. Reproductive isolation and selection | |
| 24. |
Which one is linked to evolution? |
| A. | Extinction |
| B. | Competition |
| C. | Variation |
| D. | Reproduction |
| Answer» D. Reproduction | |
| 25. |
A dihybrid condition is |
| A. | tt Rr |
| B. | Tt rr |
| C. | tt rr |
| D. | Tt Rr |
| Answer» E. | |
| 26. |
The kind of evolution in which two species of different geneology come to resemble one another closely, is termed as |
| A. | progressive evolution |
| B. | convergent evolution |
| C. | parallel evolution |
| D. | retrogressive evolution |
| Answer» C. parallel evolution | |
| 27. |
Homologous organs are |
| A. | wings of insects and bat |
| B. | gills of fish and lungs of rabbit |
| C. | pectoral fins of fish and fore limbs of horse |
| D. | wings of grosshopper and crow |
| Answer» D. wings of grosshopper and crow | |
| 28. |
The book' Origin of Species' is written by |
| A. | Aristotle |
| B. | Darwin |
| C. | Watson |
| D. | Lamarck |
| Answer» C. Watson | |
| 29. |
Scientific name of man is |
| A. | Cams familiaris |
| B. | Homo habilis |
| C. | Homo erectus |
| D. | Homo sapiens |
| Answer» E. | |
| 30. |
Nucleotide arrangement in DNA can be seen by |
| A. | X-ray crystallography |
| B. | Electron microscope |
| C. | Ultracentrifuge |
| D. | Light microscope |
| Answer» B. Electron microscope | |
| 31. |
A nucleoside differs from a nucleotide in not having |
| A. | phosphate |
| B. | sugar |
| C. | nitrogen base |
| D. | phosphate and sugar |
| Answer» B. sugar | |
| 32. |
Ligase helps in |
| A. | removal of few genes |
| B. | translation |
| C. | inserting few genes in DNA |
| D. | bringing transversion in chromosomes |
| Answer» D. bringing transversion in chromosomes | |
| 33. |
Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it? |
| A. | Thymine, Uracil - Pyrimidines |
| B. | Uracil, Cytosine - Pyrimidines |
| C. | Guanine, Adenine - Purines |
| D. | Adenine, Thymine - Purines |
| Answer» E. | |
| 34. |
The process of translation is |
| A. | ribosome synthesis |
| B. | protein synthesis |
| C. | DNA synthesis |
| D. | RNA synthesis |
| Answer» C. DNA synthesis | |
| 35. |
A nucleotide is formed of |
| A. | purine, pyrimidine and phosphate |
| B. | purine, sugar and phosphate |
| C. | nitrogenous bases, sugar and phosphate |
| D. | pyrimidine, sugar and phosphate |
| Answer» D. pyrimidine, sugar and phosphate | |
| 36. |
Mutation rates are affected by |
| A. | temperature |
| B. | X-rays |
| C. | gamma and beta radiation |
| D. | All of the above |
| Answer» E. | |
| 37. |
Which is not a part of atmosphere? |
| A. | Light |
| B. | Temperature |
| C. | Edaphic factor |
| D. | Precipitation |
| Answer» D. Precipitation | |
| 38. |
Which constituent of the atmosphere is likely to change if the forest cover is removed? |
| A. | \[{{O}_{2}}\] level is increased |
| B. | \[C{{O}_{2}}\] level is increased |
| C. | \[{{O}_{2}}\] level is significantly increases |
| D. | \[C{{O}_{2}}\] level is significantly decreased |
| Answer» C. \[{{O}_{2}}\] level is significantly increases | |
| 39. |
Deforestation causes |
| A. | soil erosion |
| B. | loss of biodiversity |
| C. | disturbance in hydrological cycle |
| D. | All of the above |
| Answer» E. | |
| 40. |
Acid rain is caused due to increase in concentration of (in atmosphere) |
| A. | \[S{{O}_{2}}\], and \[N{{O}_{2}}\] |
| B. | \[CO\] and \[C{{O}_{2}}\] |
| C. | \[CO\]and \[S{{O}_{3}}\] |
| D. | \[{{O}_{3}}\] and dust |
| Answer» B. \[CO\] and \[C{{O}_{2}}\] | |
| 41. |
Greenhouse gases include |
| A. | \[C{{O}_{2}},CFC,C{{H}_{4}}\]and \[N{{O}_{2}}\] |
| B. | \[C{{O}_{2}},{{O}_{2}},{{N}_{2}},N{{O}_{2}}\]and \[N{{H}_{3}}\] |
| C. | \[C{{H}_{4}},{{N}_{2}},C{{O}_{2}}\]and \[N{{H}_{3}}\] |
| D. | \[CFC,C{{O}_{2}},N{{H}_{3}}\]and\[{{N}_{2}}\] |
| Answer» B. \[C{{O}_{2}},{{O}_{2}},{{N}_{2}},N{{O}_{2}}\]and \[N{{H}_{3}}\] | |
| 42. |
Today the concentration of green-house gases is very high because of |
| A. | use of refrigerator |
| B. | increased combustion of oils and coal |
| C. | deforestation |
| D. | All of the above |
| Answer» E. | |
| 43. |
Ozone layer is formed in which zone of atmosphere |
| A. | Mesosphere |
| B. | Stratosphere |
| C. | Troposphere |
| D. | Ionosphere |
| Answer» C. Troposphere | |
| 44. |
Volcano is _________ source of pollution. |
| A. | artificial |
| B. | natural |
| C. | Both [a] and [b] |
| D. | man-made |
| Answer» C. Both [a] and [b] | |
| 45. |
Which of the following is most harmful pollutant? |
| A. | \[N{{O}_{2}}\] |
| B. | \[C{{O}_{2}}\] |
| C. | \[S{{O}_{2}}\] |
| D. | \[CO\] |
| Answer» D. \[CO\] | |
| 46. |
Noise pollution is created if noise is in excess to - |
| A. | 70-75 dB |
| B. | 50-60 dB |
| C. | 80-99 dB |
| D. | 40-65 dB |
| Answer» D. 40-65 dB | |
| 47. |
Which one of the following areas in India, is a hot spot of biodiversity? |
| A. | Eastern Ghats |
| B. | Gangetic Plain |
| C. | Sunderbans |
| D. | Western Ghats |
| Answer» E. | |
| 48. |
Resemblance of one organism to another for protection and hiding is |
| A. | Mimicry |
| B. | Predation |
| C. | Adaptation |
| D. | Camouflage |
| Answer» B. Predation | |
| 49. |
Which one of the following is an example of Ex-situ conservation? |
| A. | Wildlife sanctuary |
| B. | Seed bank |
| C. | Sacred groves |
| D. | National park |
| Answer» C. Sacred groves | |
| 50. |
'Project Tiger' in India was started in |
| A. | 1970 |
| B. | 1972 |
| C. | 1981 |
| D. | 1985 |
| Answer» C. 1981 | |