Digestion Quiz - CBSE Class 12 Biology

Free practice quiz: Digestion (CBSE Class 12 Biology). 10 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 12 Biology practice quiz has 10 multiple-choice questions on Digestion, and 10 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which enzyme initiates the digestion of carbohydrates in the mouth?

   1. Pepsin
   2. Trypsin
   3. Amylase
   4. Lipase
   Show answer

   Answer: C. Amylase

   Salivary amylase, present in saliva, begins the breakdown of carbohydrates (starch) into simpler sugars.

2. Where does the majority of nutrient absorption occur in the digestive system?

   1. Stomach
   2. Mouth
   3. Small intestine
   4. Large intestine
   Show answer

   Answer: C. Small intestine

   The small intestine's villi and microvilli provide a large surface area for efficient absorption of nutrients.

3. What is the role of bile in fat digestion?

   1. Breaks down fats directly
   2. Neutralizes stomach acid
   3. Emulsifies fats
   4. Activates lipase
   Show answer

   Answer: C. Emulsifies fats

   Bile salts emulsify fats, breaking them into smaller droplets, increasing the surface area for lipase to act upon.

4. Describe the function of the pancreas in digestion.

   1. Produces bile
   2. Absorbs nutrients
   3. Produces digestive enzymes and hormones
   4. Stores food
   Show answer

   Answer: C. Produces digestive enzymes and hormones

   The pancreas secretes various enzymes like amylase, lipase, and protease, as well as hormones like insulin and glucagon, playing a crucial role in digestion and blood sugar regulation.

5. Explain the role of the large intestine in digestion and water absorption.

   1. Nutrient absorption
   2. Enzyme production
   3. Water absorption and elimination of waste
   4. Fat emulsification
   Show answer

   Answer: C. Water absorption and elimination of waste

   The large intestine primarily absorbs water and electrolytes from undigested food, forming feces for elimination.

More questions in this quiz

Answers and explanations are in the full quiz.

1. What is the primary function of hydrochloric acid (HCl) in the stomach?
2. Which type of digestion involves the breakdown of food into smaller molecules by enzymes?
3. Explain the process of peristalsis and its role in digestion.
4. What are brush border enzymes, and where are they located?
5. How does the autonomic nervous system regulate the digestive process, specifically addressing the roles of the sympathetic and parasympathetic branches?

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