Biology Class 11th Chapter 16 mcqs

1. Which part of brain causes nausea?

(a) Pons

(b) Hypothalamus

(c) Parietal lobe

(d) Medulla

Answer: (d) Medulla

2. Correct enzyme-substrate pair is

(a) Maltose-lactase

(b) Protein-amylase

(c) Carbohydrate-lipase

(d) Casein-rennin

Answer: (d) Casein-rennin

3. Peyers patches found in the small intestine are

(a) Epithelial tissue

(b) Glandular tissue

(c) Lymphatic tissue

(d) Haemopoietic tissue

Answer: (c) Lymphatic tissue

4. During prolonged fasting, in what sequence are the following organic compounds used up by the body?

(a) First carbohydrates, next proteins and lastly lipids

(b) First carbohydrates, next fats and lastly proteins

(c) First fats, next carbohydrates and lastly proteins

(d) First proteins next lipids and lastly carbohydrates

Answer: (b) First carbohydrates, next fats and lastly proteins

5. In glycolysis ultimately

(a) starch is converted into glucose

(b) glucose is converted into fructose

(c) protein is converted into glucose

(d) glucose is converted into pyruric acid

Answer: (d) glucose is converted into pyruric acid

6. If for some reason our goblet cells are non-functional this will adversely affect

(a) Smooth movement of food down the intestine

(b) Production of somatostatin

(c) Secretion of sebum from the sebaceous glands

(d) Maturation of sperms

Answer: (a) Smooth movement of food down the intestine

7. The HCl in gastric juice converts:

(a) Disaccharide to monosaccharide

(b) Pepsinogen to pepsin

(c) Prorennin to rennin

(d) Polypeptide to peptide

Answer: (b) Pepsinogen to pepsin

8. Which enzyme is used in alcoholic fermentation of yeast?

(a) Maltase

(b) Invertase

(c) Sucrase

(d) Zymase

Answer: (d) Zymase

9. Assimilation means

(a) utilising the water taken by body

(b) accumulating the food for digestion

(c) utilisation of absorbed substances

(d) collecting wastes left after the absorption of required nutrients

Answer: (c) utilisation of absorbed substances

10. The pH scale is used to measure

(a) Electric charge on ion

(b) Speed with which ions form

(c) Size of ions

(d) Concentration of hydrogen ions in a solution

Answer: (d) Concentration of hydrogen ions in a solution

11. Which of the following part of human intestine hosts microorganisms?

(a) Colon

(b) Caecum

(c) Anus

(d) Rectum

Answer: (b) Caecum

12. Duct leading from parotid gland and opening into vestibule is

(a) Wolffian duct

(b) Stensons duct

(c) Haversian duct

(d) Infra-orbit duct

Answer: (b) Stensons duct

13. Which organ is most affected by jaundice?

(a) Pancreas

(b) Liver

(c) Stomach

(d) Intestine

Answer: (b) Liver

14. Globet cells of intestinal mucosal epithelium secrete

(a) mucus

(b) cholesterol

(c) peptones

(d) bilirubin

Answer: (a) mucus

15. Emulsification of fat takes place through

(a) Liver enzymes

(b) Bile pigments

(c) Bile salts

(d) Enzymes of small intestine

Answer: (c) Bile salts

16. Epithelial cells of the intestine involved in food absorption have on their surface

(a) phagocytic vesicles

(b) pinocytic vesicles

(c) microvilli

(d) zymogen granules

Answer: (c) microvilli

17. Carrier ions like Na+ facilitate the absorption of substances like

(a) Fructose and some amino acids

(b) Amino acids and glucose

(c) Glucose and fatty acids

(d) Fatty acids and glycerol

Answer: (a) Fructose and some amino acids

18. The glucose is converted into glycogen in liver and stored in

(a) Liver and spleen

(b) Liver and muscle

(c) Liver

(d) Spleen and muscles

Answer: (c) Liver

19. Small projections of upper surface of tongue are called

(a) fimbriae

(b) pilli

(c) papillae

(d) cilia

Answer: (c) papillae

20. Sweetest sugar is

(a) Fructose

(b) Sucrose

(c) Glucose

(d) Lactose

Answer: (a) Fructose