MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 1075 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Deficiency of Vitamin B6 in man causes |
| A. | rickets |
| B. | scurvy |
| C. | beriberi |
| D. | anaemia |
| Answer» E. | |
| 2. |
Match the following :IIIA. Anabaena1. BacteriaB. Mucor 2. GymnospermC. Pseudomonas3. FungiD. Ephedra4. Blue green algae |
| A. | A 4, B 2, C 3, D l |
| B. | A 4, B 3, C 1, D 2 |
| C. | A 3, B 4, C l, D 2 |
| D. | A 2, B l, C 4, D 3 |
| Answer» C. A 3, B 4, C l, D 2 | |
| 3. |
Match the following :IIIA. Chlorophyll1. Plant DiseaseB. Nostoc 2. PhotosyntheticC. Transpiration3. DiazotrophD. Rust of wheat4. Loss of water from plant surface |
| A. | A, B, C, D |
| B. | A, B, C, D |
| C. | A, B, C, D |
| D. | A, B, C, D |
| Answer» D. A, B, C, D | |
| 4. |
Match List I with List II and choose the correct response :List IList IIa. Vitamin Bl1. Pyridoxineb. Vitamin B2 2. Cyanocobalaminc. Vitamin B63.Thiamined. Vitamin Bl24. Riboflavin |
| A. | a-l, b-2, c-3, d-4 |
| B. | a-2, b-3. c-4, d-l |
| C. | a-3, b-4, c-l, d-2 |
| D. | a-4, b-1, c-2, d-3 |
| Answer» D. a-4, b-1, c-2, d-3 | |
| 5. |
Match correctly the insect vectors in List I with the diseases transmitted by them given in List II:List IList IIa. Anopheles (female)1. Kala-azar b. Culex 2. Sleeping sicknessc. Sand fly3.Filariasisd. Tse-tse flyList II4. Malaria |
| A. | a-1, b-4, c-2, d-3 |
| B. | a-2, b-l, c-4, d-3 |
| C. | a-3, b-2, c-1, d-4 |
| D. | a-4, b-3, c-l. d-2 |
| Answer» E. | |
| 6. |
The metal ion present in vitamin B12 is : |
| A. | cobalt |
| B. | zinc |
| C. | nickel |
| D. | iron |
| Answer» B. zinc | |
| 7. |
Name the vitamin not found in any animal food ? |
| A. | Vitamin B |
| B. | |
| C. | Vitamin C |
| D. | Vitamin D |
| E. | Vitamin K |
| Answer» C. Vitamin C | |
| 8. |
When the Left Ventricle in the human heart contracts, the blood moves to the |
| A. | Brain |
| B. | Pulmonary Artery |
| C. | Aorta |
| D. | Lungs |
| Answer» D. Lungs | |
| 9. |
Which of the following agricultural practices have been primarily responsible for pollution of our water resources ?A. Use of live-stock manureB. Use of chemical fertilisersC. Excessive use of chemical pesticidesD. Deforestation |
| A. | B and C |
| B. | A, C and D |
| C. | A and B |
| D. | A, B and D |
| Answer» B. A, C and D | |
| 10. |
Match correctly the infectious agents given in List I with the diseases caused by them given in List II :List IList IIA. Bacterium1.Kala-azar B. Fungus 2. TuberculosisC. Protozoan3. InfluenzaD. Virus4. Ringworm |
| A. | a-1, b-2, c-4, d-3 |
| B. | a-2, b-4, c-1, d-3 |
| C. | a-3, b-1, c-2, d-4 |
| D. | a-4, b-2, c-3, d-1 |
| Answer» C. a-3, b-1, c-2, d-4 | |
| 11. |
The Biosphere is the zone of Earth where life is found. It includes parts of :a. Hydrosphereb. Lithospherec. Stratosphered. TroposphereSelect the correct answer from the following : |
| A. | a and c |
| B. | a, b and d |
| C. | a and d |
| D. | b, c and d |
| Answer» C. a and d | |
| 12. |
The metal, which is a constituent of vitamin B12 is |
| A. | Iron |
| B. | Magnesium |
| C. | Zinc |
| D. | Cobalt |
| Answer» E. | |
| 13. |
The process through which excess of light energy is dissipated in photosynthesis is known as |
| A. | Quenching |
| B. | Scavenging |
| C. | Photolysis |
| D. | Photo-phosphorylation |
| Answer» B. Scavenging | |
| 14. |
The sum of genes in a population is called |
| A. | Phenotype |
| B. | Karyotype |
| C. | Genotype |
| D. | Gene pool |
| Answer» E. | |
| 15. |
What is the other name for Vitamin B2? |
| A. | Thiamine |
| B. | Haemoglobin |
| C. | Riboflavin |
| D. | Dextrose |
| Answer» D. Dextrose | |
| 16. |
Which of the following atmospheric gases constitute greenhouse gases?a. Carbon dioxideb. Nitrogenc. Nitrous oxided. Water vapourSelect the correct answer using the codes given below : |
| A. | a, c and d |
| B. | a and d |
| C. | a and c |
| D. | a, b and d |
| Answer» B. a and d | |
| 17. |
Which one of the following is an abnormal constituent of urine ? |
| A. | Creatinine |
| B. | Urea |
| C. | Uric acid |
| D. | Ketone bodies |
| Answer» E. | |
| 18. |
Vitamin E is particularly important for |
| A. | development of teeth |
| B. | carbohydrate metabolism |
| C. | normal activity of sex glands |
| D. | |
| E. | general health of epithelial tissues |
| Answer» D. | |
| 19. |
In the eye, colour vision is effected by the presence of : |
| A. | Choroid coat |
| B. | Sclerotic coat |
| C. | Rods |
| D. | Cones |
| Answer» E. | |
| 20. |
What is a Sponge ? |
| A. | A fungus |
| B. | A fossil |
| C. | A plant |
| D. | An animal |
| Answer» E. | |
| 21. |
Fermentation is a process of decomposition of an organic compound by : |
| A. | catalysts |
| B. | enzymes |
| C. | carbanions |
| D. | free radicals |
| Answer» C. carbanions | |
| 22. |
By which the sex of a child is determined before birth ? |
| A. | Sperms of father |
| B. | Foetus of mother |
| C. | Both (A) and (B) |
| D. | Nutrition of mother |
| Answer» C. Both (A) and (B) | |
| 23. |
Which of the following hormone is released in excess quantity during excitement ? |
| A. | Cortisone |
| B. | Serotonin |
| C. | Adrenaline |
| D. | Oestrogen |
| Answer» E. | |
| 24. |
Which of the following is known as Vitamin B1? |
| A. | Retinol |
| B. | Thiamin |
| C. | Riboflavin |
| D. | Ascorbic Acid |
| Answer» C. Riboflavin | |
| 25. |
Widal test is used for the diagnosis of |
| A. | Salmonellosis |
| B. | Malaria |
| C. | Cholera |
| D. | Typhoid |
| Answer» E. | |
| 26. |
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» D. spread of diseases | |
| 27. |
Statement I : Complex tissue is made up of more than one type of cells.Statement II : Meristems are examples of permanent tissue. |
| A. | Statement I is correct, but Statement II is incorrect. |
| B. | Statement I is incorrect, but Statement II is correct. |
| C. | Both statements I and II are correct. |
| D. | Both statements I and II are incorrect. |
| Answer» B. Statement I is incorrect, but Statement II is correct. | |
| 28. |
Normally animals can change the place, but which one of the following animals cannot change the place ? |
| A. | Starfish |
| B. | Sponge |
| C. | Hydra |
| D. | Leech |
| Answer» D. Leech | |
| 29. |
Which of the following amphibians lacks tongue ? |
| A. | Sphenodon |
| B. | Salamander |
| C. | Ichthyophis |
| D. | Necturus |
| Answer» D. Necturus | |
| 30. |
The chief raw material used for manufacturing Rayon is : |
| A. | Nylon |
| B. | Cellulose |
| C. | Silicon |
| D. | Radium and Argon |
| Answer» C. Silicon | |
| 31. |
The food conducting tissue of a plant is |
| A. | Phloem |
| B. | Xylem |
| C. | Parenchyma |
| D. | Collenchyma |
| Answer» B. Xylem | |
| 32. |
B Diversity is also known as : |
| A. | Within habitat diversity |
| B. | Ecosystem diversity |
| C. | Global diversity |
| D. | Between habitat diversity |
| Answer» C. Global diversity | |
| 33. |
The harmful substances produced by the microbes are known as |
| A. | Antibiotics |
| B. | Pollutants |
| C. | Hormones |
| D. | Toxins |
| Answer» E. | |
| 34. |
Pleura is the covering of |
| A. | Lung |
| B. | Liver |
| C. | Kidney |
| D. | Heart |
| Answer» B. Liver | |
| 35. |
In cactus, the spines are the modified |
| A. | stem |
| B. | stipulse |
| C. | leaves |
| D. | buds |
| Answer» D. buds | |
| 36. |
Process through which plants reproduce |
| A. | Pollination |
| B. | Condensation |
| C. | Eating |
| D. | Evaporation |
| Answer» B. Condensation | |
| 37. |
The noble gas used for the treatment of cancer is |
| A. | Helium |
| B. | Argon |
| C. | Krypton |
| D. | Radon |
| Answer» E. | |
| 38. |
Deficiency of Vitamin B |
| A. | rickets |
| B. | scurvy |
| C. | beriberi |
| D. | anaemia |
| Answer» E. | |
| 39. |
Red Data Book provides an account of |
| A. | Endangered plants only |
| B. | Fossil plants |
| C. | Endangered plants and animals |
| D. | Extinct animals only |
| Answer» D. Extinct animals only | |
| 40. |
Normal blood pressure reading of an adult human : |
| A. | 80/120 mm Hg |
| B. | 120/80 mm Hg |
| C. | 130/90 mm Hg |
| D. | 160/95 mm Hg |
| Answer» C. 130/90 mm Hg | |
| 41. |
If xylem and phloem are arranged in the same radius, such a vascular bundle is called : |
| A. | collateral |
| B. | bicollateral |
| C. | concentric |
| D. | radial |
| Answer» B. bicollateral | |
| 42. |
Linseed is obtained from |
| A. | Castor |
| B. | Flax |
| C. | Groundnut |
| D. | Sesame |
| Answer» C. Groundnut | |
| 43. |
Tachycardia is a condition characterized by |
| A. | heart-rate decreases from the normal |
| B. | heart- rate increases from the normal |
| C. | heart-beat stops |
| D. | heart fails to pump |
| Answer» C. heart-beat stops | |
| 44. |
The enzyme which catalyzes the unwinding of DNA helix during replication is: |
| A. | Primase |
| B. | Topoisomerase |
| C. | Helicase |
| D. | DNApolymerase |
| Answer» D. DNApolymerase | |
| 45. |
Which of the following is a form of sexual reproduction: |
| A. | Fragmentation |
| B. | Haemapheoditism |
| C. | Budding |
| D. | Fission |
| Answer» C. Budding | |
| 46. |
The five key indicators of global climate change of our planet are : |
| A. | Antartic Sea ice, Oxygen, Rainfall, Drought and Sea level |
| B. | Sea-level, Rising temperatures, Rainfall, Nitrogen and Arctic Sea ice |
| C. | Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice. |
| D. | None of these |
| Answer» D. None of these | |
| 47. |
The Ozone layer protects us from: |
| A. | Cosmic rays |
| B. | Ultra-Violet rays |
| C. | |
| D. | Visible rays |
| E. | Infrared rays |
| Answer» C. | |
| 48. |
The plant that behaves as a root parasite is |
| A. | Ficus |
| B. | Santalum |
| C. | Cuscuta |
| D. | Euphorbia |
| Answer» D. Euphorbia | |
| 49. |
Name the tiny pores present on the surface of leaves in plants. |
| A. | Pits |
| B. | Stomata |
| C. | Trichomes |
| D. | Hydathodes |
| Answer» C. Trichomes | |
| 50. |
Magnesium is a constituent metal of |
| A. | Chlorophyll molecule |
| B. | DNA |
| C. | Mitochondria |
| D. | Ribosomes |
| Answer» B. DNA | |