Class 11 Biology Chapter 16: Digestion and Absorption – 100 MCQs with Answers
1. The enzyme present in saliva is:
Answer: B) Ptyalin
2. The main site of protein digestion is:
Answer: C) Small intestine
3. The organ responsible for bile secretion:
Answer: B) Liver
4. Which hormone stimulates gastric juice secretion?
Answer: B) Gastrin
5. Absorption of digested food takes place mainly in:
Answer: C) Jejunum
6. The digestive juice which has no enzyme:
Answer: C) Bile
7. The brush-border is present in:
Answer: B) Villi
8. The main function of bile is to:
Answer: B) Emulsify fats
9. Pepsin acts best in:
Answer: B) Acidic pH
10. Glucose is absorbed in intestine by:
Answer: B) Active transport
11. The end product of starch digestion is:
Answer: B) Glucose
12. The enzyme which digests milk protein in infants:
Answer: B) Renin
13. Cholecystokinin stimulates:
Answer: D) Both A and C
14. Sphincter between stomach and duodenum:
Answer: B) Pyloric
15. Most water absorption occurs in:
Answer: B) Small intestine
16. Lipase acts on:
Answer: A) Fats
17. Vitamin B12 is absorbed in intestine only in presence of:
Answer: B) Intrinsic factor
18. Peptidases act on:
Answer: A) Peptides
19. The longest part of the alimentary canal is:
Answer: C) Ileum
20. The main function of large intestine is:
Answer: B) Absorption of water
21. Amylase in pancreatic juice acts in:
Answer: B) Alkaline pH
22. The innermost layer of alimentary canal:
Answer: D) Mucosa
23. The process of swallowing is called:
Answer: A) Deglutition
24. The hormone stimulating secretion of pancreatic juice:
Answer: B) Secretin
25. Trypsinogen is activated by:
Answer: B) Enterokinase
26. Digestion of fat starts in:
Answer: C) Duodenum
27. The process by which food moves along the gut is:
Answer: B) Peristalsis
28. Protein digestion begins in:
Answer: B) Stomach
29. Rennin is an enzyme for:
Answer: A) Protein digestion
30. Largest gland in human body:
Answer: C) Liver
31. The function of villi is to:
Answer: B) Increase surface area
32. Lacteals are associated with absorption of:
Answer: C) Fats
33. Succus entericus is:
Answer: C) Intestinal juice
34. Mucosa of stomach secretes:
Answer: B) HCl
35. The enzyme not found in pancreatic juice is:
Answer: A) Pepsin
36. Site of HCl secretion:
Answer: A) Parietal cells
37. Haustrae are present in:
Answer: B) Large intestine
38. The most potent stimulator of pancreatic juice:
Answer: B) Secretin
39. Faeces are stored in:
Answer: A) Rectum
40. Peyer’s patches occur in:
Answer: C) Ileum
41. Bile pigments are breakdown products of:
Answer: A) Hemoglobin
42. The pH of stomach is:
Answer: A) 1.5–2.5
43. Vitamin K is absorbed in:
Answer: B) Colon
44. The role of mucus in the gut is:
Answer: C) Protect lining
45. Glisson’s capsule is found in:
Answer: A) Liver
46. Gall bladder stores:
Answer: B) Bile
47. The enzyme maltase acts on:
Answer: B) Maltose
48. Kupffer cells are present in:
Answer: B) Liver
49. Chylomicrons help in transport of:
Answer: C) Fats
50. Starch digestion begins in:
Answer: A) Mouth
51. Main absorption of digested food occurs in:
Answer: C) Jejunum
52. Which component is NOT digested in human gut:
Answer: B) Cellulose
53. Digestion of nucleic acids needs:
Answer: B) Nuclease
54. Sodium absorption is:
Answer: B) Active
55. Enterokinase is secreted by:
Answer: B) Intestinal mucosa
56. Saliva is rich in:
Answer: D) Both B and C
57. Pepsinogen is activated by:
Answer: A) HCl
58. Largest part of large intestine is:
Answer: B) Colon
59. Goblet cells secrete:
Answer: A) Mucus
60. The fate of indigestible food is:
Answer: B) Excreted
61. Chief cells secrete:
Answer: A) Pepsinogen
62. Carbohydrate digestion is completed in:
Answer: C) Small intestine
63. Which vitamin requires intrinsic factor for absorption:
Answer: B) B12
64. Bile helps in absorption of:
Answer: C) Fats
65. Functions of large intestine include:
Answer: D) All above
66. Hormone stimulating gall bladder contraction:
Answer: C) Cholecystokinin
67. High protein food is digested by:
Answer: D) All above
68. Chylomicrons are absorbed into:
Answer: B) Lacteals
69. Trypsin digests:
Answer: C) Proteins
70. Brunner’s glands are found in:
Answer: A) Duodenum
71. What is the basic functional unit for nutrient absorption?
Answer: A) Villi
72. Cellulose is digested by:
Answer: B) Enzymes from bacteria
73. The total number of canine teeth in adult human is:
Answer: B) 4
74. The term “mastication” refers to:
Answer: A) Chewing
75. Parotid gland secretes:
Answer: B) Serous fluid
76. Which ion is abundant in gastric juice?
Answer: B) Cl-
77. The enzyme for DNA digestion is:
Answer: A) Nuclease
78. Mucus is a:
Answer: C) Glycoprotein
79. Digestion of sucrose yields:
Answer: A) Glucose + fructose
80. The pH optimum for pancreatic lipase is:
Answer: B) Slightly alkaline
81. Gastric juice contains:
Answer: D) All above
82. Which is not a function of saliva?
Answer: D) Absorption
83. Salivary enzyme action stops in stomach due to:
Answer: A) HCl acidity
84. Shortest part of digestive tract:
Answer: D) Pharynx
85. Enterokinase activates:
Answer: A) Trypsinogen
86. Which enzyme is lacking in human saliva?
Answer: C) Maltase
87. Carboxypeptidase acts on:
Answer: B) Peptides
88. Which mineral is essential for HCl production?
Answer: A) Chloride
89. The sphincter between esophagus and stomach:
Answer: B) Cardiac
90. Which enzyme is secreted in inactive form?
Answer: C) Both above
91. Which hormone stimulates gastric HCl secretion?
Answer: B) Gastrin
92. Vitamins produced by intestinal bacteria include:
Answer: D) All above
93. Which is NOT part of tooth?
Answer: D) Pericardium
94. Number of molars in a permanent human dentition per jaw:
Answer: B) 6
95. pH of pancreatic juice is:
Answer: C) 8
96. Indigestible material is eliminated as:
Answer: B) Feces
97. Trypsin acts in:
Answer: B) Alkaline pH
98. Absorption of fatty acids occurs via:
Answer: A) Diffusion
99. Which structure prevents food entering windpipe?
Answer: B) Epiglottis
100. The main function of digestion is to:
Answer: A) Break down food