Biology Digestion Online Mcqs Test

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Question 1

1. What is the role of mucus in the digestive tract?

Answer

Absorbs nutrients

Answer

Lubricates and protects the lining

Answer

Breaks down food

Answer

Neutralizes acid

Question 2

2. Which of the following nutrients does NOT begin digestion in the mouth?

Answer

All of the above

Answer

Carbohydrates

Answer

None of the above

Question 3

3. Which of the following is an accessory digestive organ?

Answer

Small intestine

Question 4

4. Which structure absorbs water and forms feces?

Answer

Large intestine

Answer

Small intestine

Question 5

5. Which enzyme begins the digestion of starch in the mouth?

Question 6

6. Which vitamin is absorbed in the large intestine?

Answer

Vitamin B12

Question 7

7. What type of digestion occurs in the mouth?

Answer

Mechanical and chemical

Answer

Only mechanical

Answer

Only chemical

Answer

Absorptive

Question 8

8. What is the role of the pancreas in digestion?

Answer

Mixes food mechanically

Answer

Absorbs nutrients

Answer

Stores bile

Answer

Produces digestive enzymes

Question 9

9. Which enzyme digests proteins in the stomach?

Question 10

10. Which of the following is the main site for digestion and absorption of nutrients?

Answer

Large intestine

Answer

Small intestine

Question 11

11. Which of these best describes the liver’s function in digestion?

Answer

Produces bile

Answer

Produces digestive enzymes

Answer

Stores undigested food

Answer

Absorbs nutrients

Question 12

12. Which part of the digestive system absorbs most of the water?

Answer

Small intestine

Answer

Large intestine

Question 13

13. What is the function of the enzyme maltase?

Answer

Converts maltose into glucose

Answer

Converts proteins into peptides

Answer

Breaks down lipids

Answer

Emulsifies fats

Question 14

14. Where is the enzyme pepsin active?

Answer

Large intestine

Answer

Small intestine

Question 15

15. What causes the acidic pH in the stomach?

Answer

Sodium bicarbonate

Answer

Gastric mucus

Answer

Hydrochloric acid

Question 16

16. Which hormone stimulates the release of gastric juice?

Question 17

17. Which part of the digestive system produces hydrochloric acid?

Answer

Small intestine

Question 18

18. Which of these organs detoxifies harmful substances in the body?

Question 19

19. Which organ produces insulin and digestive enzymes?

Answer

Gallbladder

Question 20

20. What is the role of the enzyme sucrase?

Answer

Breaks down starch

Answer

Converts sucrose into glucose and fructose

Answer

Breaks down protein

Answer

Emulsifies fat

Question 21

21. What is the function of the rectum?

Answer

Store feces before elimination

Answer

Produce bile

Answer

Absorb nutrients

Answer

Mix food with enzymes

Question 22

22. Which gland produces saliva?

Question 23

23. What triggers the release of bile from the gallbladder?

Answer

Acid in the stomach

Answer

Presence of fats in the small intestine

Answer

High blood sugar

Answer

Presence of starch

Question 24

24. Which of the following nutrients is digested mainly by enzymes from the pancreas?

Question 25

25. What is the function of bile in digestion?

Answer

Neutralizes stomach acid

Answer

Breaks proteins

Answer

Absorbs vitamins

Answer

Emulsifies fats

Question 26

26. What is the main function of the stomach in digestion?

Answer

Break down food with acid and enzymes

Answer

Store bile

Answer

Produce insulin

Answer

Absorb water

Question 27

27. Which part of the small intestine receives bile and pancreatic juice?

Question 28

28. What type of gland is the pancreas in terms of digestion?

Answer

Exocrine gland only

Answer

Both endocrine and exocrine

Answer

Endocrine gland only

Answer

Digestive organ only

Question 29

29. Which part of the large intestine connects to the small intestine?

Answer

Sigmoid colon

Question 30

30. Which nutrient begins its digestion in the mouth?

Answer

Carbohydrates

Question 31

31. Which nutrient is absorbed into lacteals in the villi?

Answer

Fatty acids

Answer

Amino acids

Question 32

32. What is the term for the rhythmic contractions that move food through the digestive tract?

Answer

Peristalsis

Answer

Absorption

Question 33

33. Which structure connects the mouth to the esophagus?

Question 34

34. What is the end product of carbohydrate digestion?

Answer

Amino acids

Answer

Fatty acids

Question 35

35. Where does most protein digestion take place?

Answer

Large intestine

Answer

Small intestine

Question 36

36. What is the function of the enzyme lipase?

Answer

Digests starch

Answer

Digests protein

Answer

Absorbs calcium

Answer

Digests fat

Question 37

37. What is the function of the appendix in digestion?

Answer

Produces enzymes

Answer

No known essential function

Answer

Absorbs water

Answer

Stores bile

Question 38

38. What is the main role of the gallbladder?

Answer

Produce insulin

Answer

Store and concentrate bile

Answer

Digest carbohydrates

Answer

Absorb nutrients

Question 39

39. What are the finger-like projections in the small intestine called?

Answer

Microvilli

Question 40

40. What is the role of sodium bicarbonate in digestion?

Answer

Neutralizes stomach acid in the small intestine

Answer

Produces bile

Answer

Activates enzymes

Answer

Breaks down protein

Question 41

41. What is the name of the semi-liquid mixture of food and digestive juices in the stomach?

Question 42

42. Which part of the digestive system is responsible for mixing food with gastric juice?

Answer

Small intestine

Question 43

43. What substance in the stomach helps kill bacteria and activate enzymes?

Answer

Sodium bicarbonate

Answer

Hydrochloric acid

Question 44

44. Which part of the digestive tract connects the mouth to the stomach?

Question 45

45. Which of the following structures prevents food from entering the windpipe?

Answer

Epiglottis

Question 46

46. Which enzyme is secreted by the pancreas to digest proteins?

Question 47

47. Where is bile stored before being released into the small intestine?

Answer

Gallbladder

Question 48

48. Which enzyme is responsible for protein digestion in the small intestine?

Question 49

49. What is the function of the villi in the small intestine?

Answer

Produce enzymes

Answer

Absorb nutrients

Answer

Move food forward

Answer

Protect the walls

Question 50

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Total Questions:	50
Time Allowed:	25 Minutes
Total Marks:	50
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	Biology Test MDCAT Test FPSC/PPSC/SPSC/KPPSC/BPSC/AJKPSC/NTS Biology Interview Question Answer Universities Entrance Test

Biology Digestion Online Mcqs Test

Important Biology Digestion Question and Answer

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Important Biology Digestion Question and Answer

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