NEET 2025 MCQ with Answer Explanation : “Digestion and Absorption”.

MCQ 31:
What type of enzyme breaks down proteins into smaller peptides?

A) Amylase
B) Lipase
C) Protease
D) Lactase

Answer: C) Protease

Explanation: Proteases are enzymes that cleave peptide bonds, breaking down proteins into smaller peptides.

MCQ 32:
Which structure is responsible for the emulsification of fats?

A) Pancreas
B) Liver
C) Gallbladder
D) All of the above

Answer: D) All of the above

Explanation: The liver produces bile, which is stored in the gallbladder, and bile salts help emulsify fats in the small intestine.

MCQ 33:
Which of the following is NOT a component of gastric juice?

A) Hydrochloric acid
B) Pepsinogen
C) Amylase
D) Intrinsic factor

Answer: C) Amylase

Explanation: Amylase is not found in gastric juice; it is present in saliva and helps digest carbohydrates in the mouth.

MCQ 34:
What is the main function of the liver in digestion?

A) Secretes enzymes
B) Produces bile
C) Absorbs nutrients
D) Breaks down carbohydrates

Answer: B) Produces bile

Explanation: The liver produces bile, which is essential for the digestion and absorption of fats.

MCQ 35:
Which process allows for the movement of nutrients from the intestinal lumen into the blood?

A) Filtration
B) Diffusion
C) Absorption
D) Excretion

Answer: C) Absorption

Explanation: Absorption is the process by which nutrients move from the intestinal lumen into the bloodstream.

MCQ 36:
Which of the following is an active transport process?

A) Simple diffusion of oxygen
B) Glucose transport in the intestine
C) Osmosis of water
D) Passive transport of ions

Answer: B) Glucose transport in the intestine

Explanation: Glucose is absorbed through active transport in the intestinal lining, requiring energy.

MCQ 37:
Which component of the digestive system helps protect the stomach lining from acid?

A) Mucus
B) Bile
C) Saliva
D) Pancreatic juice

Answer: A) Mucus

Explanation: Mucus produced by the gastric mucosa protects the stomach lining from the corrosive effects of hydrochloric acid.

MCQ 38:
What is the primary carbohydrate stored in the liver?

A) Glycogen
B) Glucose
C) Fructose
D) Lactose

Answer: A) Glycogen

Explanation: Glycogen is the primary storage form of glucose in the liver and muscles, which can be converted back to glucose when needed.

MCQ 39:
Which type of fat is primarily digested in the stomach?

A) Saturated fat
B) Trans fat
C) Unsaturated fat
D) None of the above

Answer: D) None of the above

Explanation: While some lipid digestion occurs in the stomach, the primary digestion of fats occurs in the small intestine with the help of bile and lipase.

MCQ 40:
Which digestive enzyme is specific for lactose?

A) Amylase
B) Lactase
C) Maltase
D) Sucrase

Answer: B) Lactase

Explanation: Lactase is the enzyme that breaks down lactose into glucose and galactose.