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NCERT Solutions › Biology › Chapter 16

Chapter 16: Digestion & Absorption

NCERT Solutions for CBSE Class 10 Biology — 18 solved questions with detailed explanations.

18
Questions
0
Topics

Solved Questions

Q1. The enzyme pepsin acts on:

Difficulty: Easy · Topic: Enzymes

Solution

Pepsin (active in acidic pH 1.5-2) is a protease that breaks down proteins into peptides in the stomach.

Q2. Bile is produced by the:

Difficulty: Easy · Topic: Bile

Solution

Bile is produced by hepatocytes in the liver, stored and concentrated in the gall bladder, released into the duodenum.

Q3. The absorption of digested food mainly occurs in the:

Difficulty: Easy · Topic: Absorption

Solution

Small intestine (especially jejunum and ileum) is the main site of nutrient absorption due to villi and microvilli.

Q4. HCl in stomach:

Difficulty: Easy · Topic: Digestion & Absorption

Solution

activates pepsinogen to pepsin.

Q5. Trypsin acts on:

Difficulty: Easy · Topic: Digestion & Absorption

Solution

proteins (in small intestine).

Q6. Deficiency of Vitamin A causes:

Difficulty: Easy · Topic: Vitamins

Solution

Vitamin A deficiency → Night blindness (xerophthalmia).

Q7. Deficiency of Vitamin B1 (Thiamine) causes:

Difficulty: Easy · Topic: Vitamins

Solution

Vitamin B1 (Thiamine) deficiency → Beriberi.

Q8. Deficiency of Vitamin B2 (Riboflavin) causes:

Difficulty: Easy · Topic: Vitamins

Solution

Vitamin B2 (Riboflavin) deficiency → Cheilosis (cracked lips).

Q9. Deficiency of Vitamin B3 (Niacin) causes:

Difficulty: Easy · Topic: Vitamins

Solution

Vitamin B3 (Niacin) deficiency → Pellagra.

Q10. Deficiency of Vitamin B12 causes:

Difficulty: Easy · Topic: Vitamins

Solution

Vitamin B12 deficiency → Pernicious anemia.

Q11. Deficiency of Vitamin C causes:

Difficulty: Easy · Topic: Vitamins

Solution

Vitamin C deficiency → Scurvy.

Q12. Deficiency of Vitamin D causes:

Difficulty: Easy · Topic: Vitamins

Solution

Vitamin D deficiency → Rickets (in children).

Q13. Deficiency of Vitamin E causes:

Difficulty: Easy · Topic: Vitamins

Solution

Vitamin E deficiency → Sterility/reproductive failure.

Q14. Deficiency of Vitamin K causes:

Difficulty: Easy · Topic: Vitamins

Solution

Vitamin K deficiency → Delayed blood clotting.

Q15. Salivary amylase acts on:

Difficulty: Easy-Medium · Topic: Digestion & Absorption

Solution

starch.

Q16. Lipase digests:

Difficulty: Easy-Medium · Topic: Digestion & Absorption

Solution

fats into fatty acids + glycerol.

Q17. Villi increase:

Difficulty: Easy-Medium · Topic: Digestion & Absorption

Solution

surface area for absorption.

Q18. Liver produces bile that helps in:

Difficulty: Easy-Medium · Topic: Digestion & Absorption

Solution

emulsification of fats.

Other Chapters in Biology

Ch 1: The Living WorldCh 2: Biological ClassificationCh 3: Plant KingdomCh 4: Animal KingdomCh 5: Morphology of PlantsCh 6: Anatomy of PlantsCh 7: Structural Organisation in AnimalsCh 8: Cell Unit of LifeCh 9: BiomoleculesCh 10: Cell CycleCh 11: Transport in PlantsCh 12: Mineral NutritionCh 13: PhotosynthesisCh 14: Respiration in PlantsCh 15: Plant GrowthCh 17: Breathing & Gas ExchangeCh 18: Body Fluids & CirculationCh 19: Excretory ProductsCh 20: Locomotion & MovementCh 21: Neural ControlCh 22: Chemical Coordination

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