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.
Play all 10 questions freeSample questions
Which enzyme initiates the digestion of carbohydrates in the mouth?
- Pepsin
- Trypsin
- Amylase
- Lipase
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Answer: C. Amylase
Salivary amylase, present in saliva, begins the breakdown of carbohydrates (starch) into simpler sugars.
Where does the majority of nutrient absorption occur in the digestive system?
- Stomach
- Mouth
- Small intestine
- Large intestine
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Answer: C. Small intestine
The small intestine's villi and microvilli provide a large surface area for efficient absorption of nutrients.
What is the role of bile in fat digestion?
- Breaks down fats directly
- Neutralizes stomach acid
- Emulsifies fats
- Activates lipase
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Answer: C. Emulsifies fats
Bile salts emulsify fats, breaking them into smaller droplets, increasing the surface area for lipase to act upon.
Describe the function of the pancreas in digestion.
- Produces bile
- Absorbs nutrients
- Produces digestive enzymes and hormones
- Stores food
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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.
Explain the role of the large intestine in digestion and water absorption.
- Nutrient absorption
- Enzyme production
- Water absorption and elimination of waste
- Fat emulsification
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Answer: C. Water absorption and elimination of waste
The large intestine primarily absorbs water and electrolytes from undigested food, forming feces for elimination.