Biology MCQs

11. Which of the following is the largest cell in mammalian blood?
[A] Erythrocytes
[B] Monocytes
[C] Lymphocytes
[D] Basophils

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12. Niacin is the chemical name of which vitamin?
[A] Vitamin B1
[B] Vitamin B3
[C] Vitamin B2
[D] Vitamin C

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13. Which of the following is responsible for giving colour to human skin?
[A] Haemoglobin
[B] Melanin
[C] Luciferin
[D] Flavonoids

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14. Due to which of the following reasons the scratching eases itching? (UPSC Prelims 1993)
[A] it removes the outer dust in the skin
[B] it kills the germs
[C] it stimulates certain nerves which direct the brain to increase the production of antihistaminic chemicals
[D] it suppresses the production of enzymes which cause itching

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15. Which vitamin is also called as retinol?
[A] Vitamin A
[B] Vitamin C
[C] Vitamin D
[D] Vitamin K

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16. Which is the world’s smallest bird?
[A] Red-cheeked Cordon-Bleu
[B] Costa’s Hummingbird
[C] Bee Hummingbird
[D] Goldcrest

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17. Which branch of biology is known for the study of developmental process of organisms?
[A] Genetics
[B] Evolution
[C] Histology
[D] Heredity

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18. Which branch of biology is deal with the study of seeds?
[A] Embryology
[B] Spermatology
[C] Gerontology
[D] Histology

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19. Which of the following is involved in the synthesis of phospholipids?
[A] Mitochondria
[B] Cytoplasm
[C] Endoplasmic Reticulum
[D] Smooth Endoplasmic Reticulum

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20. Which of the following compounds is not found in protein?
[A] Carbon
[B] Hydrogen
[C] Sulfur
[D] Helium

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