MCQOPTIONS
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MCQOPTIONS
This section includes 274 Mcqs, each offering curated multiple-choice questions to sharpen your UPSC IAS Exam knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Main function of lenticel is |
| A. | transpiration |
| B. | guttation |
| C. | gaseous exchange |
| D. | both [a] & [c] |
| Answer» B. guttation | |
| 2. |
Cork is formed from |
| A. | phellogen |
| B. | vascular cambium |
| C. | phloem |
| D. | xylem |
| Answer» B. vascular cambium | |
| 3. |
Which of the following statement(s) is/are correct about the ground tissue system?(i) All tissues except epidermis and vascular bundles constitute the ground tissue.(ii) It consists of xylem and phloem.(iii) In leaves, it consists of thin - walled chloroplast containing cells called mesophyll. |
| A. | Only (i) |
| B. | Both (i) and (iii) |
| C. | Both (ii) and (iii) |
| D. | All of these |
| Answer» C. Both (ii) and (iii) | |
| 4. |
Column-I Column-IIA.AuxinI.Fruit ripeningB.CytokininsII.Apical dominanceC.Abscisic acidIII.Antagonist to GAsD.Ethylene ClosingIV.Stomatal opening and V.Growth of lateral buds |
| A. | A-IV; B-V; C-III; D-I |
| B. | A-II; B-IV; C-III, IV; D-I |
| C. | A-II; B-V; C-III, IV; D-I |
| D. | A-III, IV; B-V; C-II; D-I |
| Answer» D. A-III, IV; B-V; C-II; D-I | |
| 5. |
Day neutral plants relate to |
| A. | loss of activity during day time. |
| B. | flowering in all possible photoperiods. |
| C. | overactive during day time. |
| D. | no flowering in any photoperiods. |
| Answer» B. flowering in all possible photoperiods. | |
| 6. |
Biological catalysts in living organisms are known as [NDA] |
| A. | hormones |
| B. | vitamins |
| C. | steroids |
| D. | enzymes |
| Answer» E. | |
| 7. |
A typical human ribcage consists of how many ribs? [NDA] |
| A. | 12 |
| B. | 14 |
| C. | 16 |
| D. | 24 |
| Answer» B. 14 | |
| 8. |
Which of the following is an epidermal cell |
| A. | Guard cells |
| B. | Root hairs |
| C. | Trichome |
| D. | All of these |
| Answer» E. | |
| 9. |
A surge of which hormone stimulates ovulation in human females? [NDA] |
| A. | Luteinizing hormone |
| B. | Estrogen |
| C. | Follicle stimulating hormone |
| D. | Progesterone |
| Answer» B. Estrogen | |
| 10. |
Which one of the following is an enzyme? [NDA] |
| A. | Gastrin |
| B. | Keratin |
| C. | Trypsin |
| D. | Vasopressin |
| Answer» D. Vasopressin | |
| 11. |
Due to accumulation of which one of the following, joggers experience pain in their leg muscles after running? [NDA] |
| A. | Lactic acid |
| B. | Acetic acid |
| C. | Malic acid |
| D. | Citric acid |
| Answer» B. Acetic acid | |
| 12. |
The pH of blood is. |
| A. | Acidic |
| B. | Alkaline |
| C. | Slightly alkaline |
| D. | None of the above |
| Answer» D. None of the above | |
| 13. |
Which of the following tissues has dead cells? |
| A. | Parenchyma |
| B. | Sclerenchyma |
| C. | Collenchyma |
| D. | Epithelial tissue |
| Answer» C. Collenchyma | |
| 14. |
Various functions like photosynthesis, storage, excretion performed by _________. |
| A. | Sclerenchyma |
| B. | parenchyma |
| C. | Collenchyma |
| D. | Aerenchyma |
| Answer» C. Collenchyma | |
| 15. |
Lignin is the important constituent in the cell wall of |
| A. | phloem |
| B. | parenchyma |
| C. | xylem |
| D. | cambium |
| Answer» D. cambium | |
| 16. |
Nucleated part of nerve cell is called |
| A. | axon |
| B. | dendrites |
| C. | cyton |
| D. | None of the above |
| Answer» D. None of the above | |
| 17. |
Largest number of neuron cell is present in human body in |
| A. | retina |
| B. | spinal cord |
| C. | brain |
| D. | tongue |
| Answer» D. tongue | |
| 18. |
Girth of stem increases due to |
| A. | apical meristem |
| B. | lateral meristem |
| C. | intercalary meristem |
| D. | vertical meristem |
| Answer» C. intercalary meristem | |
| 19. |
The dead element present in the phloem is |
| A. | companion cells |
| B. | phloem fibres |
| C. | phloem parenchyma |
| D. | sieve tube |
| Answer» C. phloem parenchyma | |
| 20. |
Which one of the following process releases a carbon dioxide molecule? |
| A. | Glycolysis |
| B. | Lactic acid fermentation |
| C. | Alcohol fermentation |
| D. | Hydrolysis of glycogen |
| Answer» D. Hydrolysis of glycogen | |
| 21. |
Total number of ATP consume during Kerb's cycle is |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» B. 1 | |
| 22. |
Which one of the following glands produces insulin in human body? [NDA] |
| A. | Liver |
| B. | Pancreas |
| C. | Spleen |
| D. | Pituitary |
| Answer» C. Spleen | |
| 23. |
Which one of the following pairs is not correctly matched: [NDA] |
| A. | Loop of Heni : Kidney |
| B. | Fallopian tube : Female reproductive system |
| C. | Epididymis : Male reproductive system |
| D. | Cowper's gland : Intestine |
| Answer» E. | |
| 24. |
Cure to spinal injury is likely to emerge from [NDA] |
| A. | gene therapy |
| B. | stem cell therapy |
| C. | xenograft |
| D. | transfusion |
| Answer» C. xenograft | |
| 25. |
The muscles in stomach are. |
| A. | voluntary |
| B. | involuntary |
| C. | Cardior |
| D. | None of the above |
| Answer» C. Cardior | |
| 26. |
Column-I Column - IIA.IsotonicI.External solution is more concentratedB.HypotonicII.Shrinkage of protoplasmC.HypertonicIII.Solution is more dilute than the cytoplasmD.PlasmolysisIV.Two solutions have the same osmolarity |
| A. | A-II; B-I; C-IV; D-III |
| B. | A-IV; B-III; C-I; D-II |
| C. | A-III; B-I; C-IV; D-II |
| D. | A-II; B-III; C-IV; D-I |
| Answer» C. A-III; B-I; C-IV; D-II | |
| 27. |
List-I List-II [IAS Prelim]A.Fruit1.OvuleB.Seed2.LeafC.Wood3.StemD.Starch4.Ovary |
| A. | A-2; B-1; C-3; D- 4 |
| B. | A-4; B-1; C-3; D-2 |
| C. | A-2; B-3; C-1; D-4 |
| D. | A-4; B-3; C-1; D-2 |
| Answer» C. A-2; B-3; C-1; D-4 | |
| 28. |
Fertilization is |
| A. | Formation of seedling from seeds |
| B. | Transfer of pollen to the carpel part |
| C. | Fusion of sperm and ovum. |
| D. | All the above |
| Answer» D. All the above | |
| 29. |
According to which of the following organization "reproductive health means a total well-being in all aspects of reproduction"? |
| A. | WHL |
| B. | UNESCO |
| C. | WHO |
| D. | WWW |
| Answer» D. WWW | |
| 30. |
Consider the following statements: A. Plants are divided into five groups: Thallophytes, Bryophytes, Pteridophytes, Gymnosperms and Angiosperms. B. Lichens are examples of liverworts. C. The algae are vascular plants. D. Angiosperm is the least diversified form than any other plant groups. Which of these statement(s) is/are correct? |
| A. | A, B and C |
| B. | B, C and D |
| C. | A and D |
| D. | All are correct |
| Answer» D. All are correct | |
| 31. |
Which of the following statements are true for flowers? A. Flowers are always bisexual. B. They are the sexual reproductive organs. C. They are produced in all groups of plants. D. After fertilization they give rise to fruits. |
| A. | A and D |
| B. | B and C |
| C. | A and C |
| D. | B and D |
| Answer» E. | |
| 32. |
Egg is liberated from ovary in |
| A. | Secondary oocyte stage |
| B. | Primary oocyte stage |
| C. | Oogonial stage |
| D. | Mature ovum stage |
| Answer» B. Primary oocyte stage | |
| 33. |
Polar body is produced during the formation of - |
| A. | Sperm |
| B. | Secondary oocyte |
| C. | Oogonium |
| D. | Spermatocytes |
| Answer» C. Oogonium | |
| 34. |
All are sexually transmitted diseases except |
| A. | AIDS |
| B. | Breast cancer |
| C. | Gonorrhea |
| D. | Syphilis |
| Answer» C. Gonorrhea | |
| 35. |
Cowper's glands are found in |
| A. | male mammals |
| B. | female mammals |
| C. | male amphibians |
| D. | female amphibians |
| Answer» B. female mammals | |
| 36. |
Ovulation in mammals is caused by |
| A. | FSH and TSH |
| B. | FSH and LH |
| C. | FSH and LTH |
| D. | LTH and LH |
| Answer» B. FSH and LH | |
| 37. |
Where pollination is done by animals it is |
| A. | Anemophily |
| B. | Hydrophily |
| C. | Zoophiliy |
| D. | Chiropterophily |
| Answer» D. Chiropterophily | |
| 38. |
All are hormones except |
| A. | Estrogen |
| B. | Testosterone |
| C. | FSH |
| D. | Tocopherol |
| Answer» D. Tocopherol | |
| 39. |
Callus formation in plants means |
| A. | growth of cancer cells. |
| B. | microorganism attack only. |
| C. | a disease. |
| D. | tissue culture technique. |
| Answer» E. | |
| 40. |
In which of the following pair. Uric acid is present in the excreta? |
| A. | Bird - Shark |
| B. | Frog - Lizard |
| C. | Man - Insect |
| D. | Insect - Shark |
| Answer» C. Man - Insect | |
| 41. |
Which is common method of multiplication of Yeast and Hydra. |
| A. | Budding |
| B. | Fragmentation |
| C. | Binary fission |
| D. | Vegetative reproduction |
| Answer» B. Fragmentation | |
| 42. |
The capacity of organisms to reproduce after being cut into many pieces is called |
| A. | Budding |
| B. | Fission |
| C. | Regeneration |
| D. | Reproduction |
| Answer» D. Reproduction | |
| 43. |
Column-I Column-IIA.Pollen & stigmaP.female part in plantsB.Radicle in a cotyledonQ.rootC.OvuleR.rootD.PcumuleS.male reproductive parts in a plant. |
| A. | A-P; B-Q; C-R; D-P |
| B. | A-S; B-Q; C-R; D-R |
| C. | A-P; B-Q; C-S; D-R |
| D. | A-S; B-P; C-R; D-Q |
| Answer» C. A-P; B-Q; C-S; D-R | |
| 44. |
Progesterone is secreted by |
| A. | Corpus luteum |
| B. | Thyroid |
| C. | Thymus |
| D. | Testes |
| Answer» B. Thyroid | |
| 45. |
The process of development of organism like itself is called |
| A. | Budding |
| B. | Flowering |
| C. | Reproduction |
| D. | None of the above |
| Answer» D. None of the above | |
| 46. |
The migration of pollen grains to stigma is called as |
| A. | Fertilization |
| B. | Pollination |
| C. | Fusion |
| D. | Reproduction |
| Answer» C. Fusion | |
| 47. |
The development of off spring from any part of body is called |
| A. | Asexual reproduction |
| B. | Sexual reproduction |
| C. | Vegetative reproduction |
| D. | All the above |
| Answer» B. Sexual reproduction | |
| 48. |
Stomata: gaseous exchange from leaves: gaseous exchange from bark cells |
| A. | cuticles |
| B. | pores |
| C. | stomata |
| D. | lenticels |
| Answer» E. | |
| 49. |
Erythropoesis may be stimulated by the deficiency of |
| A. | Iron |
| B. | Oxygen |
| C. | Protein |
| D. | None of the above |
| Answer» C. Protein | |
| 50. |
Which of the following is a micronutrient element- |
| A. | Mg |
| B. | K |
| C. | Ca |
| D. | Zn |
| Answer» E. | |