Biology-Physics-Chemistry (GK) solved MCQs

1 of 12

1. Which gland is not associated with humanalimentary canal?

a. salivary glands

B. adrenal gland

c. liver

d. pancreas

2. In humans, bile juice is secreted by

a. pancreas

B. small intestine

c. esophagus

d. liver

3. An enzyme which can only act in acidic medium is

a. pepsin

B. trypsin

c. rennin

d. amylase

4. The part of digestive system where no digestionoccurs

a. duodenum

B. esophagus

c. stomach

d. mouth

5. Which of the following animals has no need for agall bladder?

a. horse

B. lion

c. dog

d. human

6. About how much saliva does a person produceeach day?

a. 100 ml

B. 250 ml

c. 500 ml

d. 1500 ml

7. Saliva has the enzyme

a. pepsin

B. ptyalin

c. trypsin

d. rennin

8. Curdling of milk in the stomach is due to theaction of

a. pepsin

B. rennin

c. HCL

d. rennin

9. Pepsinogen is secreted by

a. gastric glands

B. intestinal glands

c. chief cells

d. parietal cells

10. Pancreas has

a. only endocrine cells

B. only one type of cell, the same functioning both in an exocrine and endocrine fashion

c. two types of cells-exocrine and endocrine

d. only exocrine cells

11. Largest gland in human body is

a. liver

B. pancreas

c. pituitary

d. thyroid

12. Grana refers to

a. glycolysis of glucose

B. by-product of photosynthesis

c. stacks of thylakoids

d. stacks of quantasomes

13. A specific function of light energy in the processof photosynthesis is to

a. activate chlorophyll

B. split water

c. synthesis glucose

d. reduce CO2

14. ATP formation during photosynthesis is known as

a. phosphorylation

B. photophosphorylation

c. oxidative phosphorylation

d. substrate level phosphorylation

15. Dark reaction in photosynthesis is called so because

a. it does not require light energy

B. cannot occur during daytime

c. occurs more rapidly at night

d. it can also occur in darkness

16. Which of the following is connected withtransport of water in plants?

a. phloem

B. xylem

c. epidermis

d. cambium

17. The ultimate cause for movement of wateragainst gravity in a tree is

a. osmosis

B. imbibitions

c. transpiration

d. photosynthesis

18. Which of the following is not an example of aselectively permeable membrane?

a. plasma lemma

B. cell Wall

c. mitochondrial membrane

d. chloroplast membrane

19. Which of the following is responsible for guttation?

a. root pressure

B. transpiration

c. photosynthesis

d. osmosis

20. Phenyl mercuric acetate

a. reduces transpiration rate

B. reduces photosynthesis

c. kills the plant

d. reduce respiration

21. Which of the following has no blood but respires?

a. earthworm

B. hydra

c. cockroach

d. fish

22. Which type of respiratory organs are present inspiders and scorpions?

a. book lungs

B. gill books

c. gills

d. lungs

23. At high altitude, RBCs of human blood will

a. increase in number

B. decrease in number

c. decrease in size

d. increase in size

24. Vocal cords occur in

a. pharynx

B. glottis

c. bronchial tube

d. larynx

25. Which one of the following structures closes therespiratory passage during ingestion of food?

a. larynx

B. epiglottis

c. hard palate

d. soft palate

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