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

MCQ 91:
Which of the following is true about pancreatic juice?

A) It is alkaline.
B) It contains digestive enzymes.
C) It neutralizes stomach acid.
D) All of the above.

Answer: D) All of the above.

Explanation: Pancreatic juice is alkaline, contains digestive enzymes, and helps neutralize stomach acid in the small intestine.

MCQ 92:
Which of the following hormones is released in response to high blood glucose levels?

A) Glucagon
B) Insulin
C) Secretin
D) Gastrin

Answer: B) Insulin

Explanation: Insulin is released by the pancreas to help lower blood glucose levels by facilitating the uptake of glucose into cells.

MCQ 93:
What substance is produced by the liver and aids in fat digestion?

A) Pepsin
B) Bile
C) Amylase
D) Lipase

Answer: B) Bile

Explanation: Bile is produced by the liver and helps emulsify fats in the small intestine, making them easier to digest.

MCQ 94:
Which nutrient requires a sodium-dependent transport mechanism for absorption?

A) Glucose
B) Amino acids
C) Fatty acids
D) Both A and B

Answer: D) Both A and B

Explanation: Both glucose and certain amino acids are absorbed via sodium-dependent transport mechanisms in the small intestine.

MCQ 95:
What is the primary function of the large intestine?

A) Digestion of proteins
B) Absorption of nutrients
C) Absorption of water and electrolytes
D) Emulsification of fats

Answer: C) Absorption of water and electrolytes

Explanation: The large intestine’s primary role is to absorb water and electrolytes from indigestible food matter, forming solid waste.

MCQ 96:
Which enzyme is responsible for the digestion of triglycerides?

A) Amylase
B) Lipase
C) Pepsin
D) Maltase

Answer: B) Lipase

Explanation: Lipase is the enzyme that breaks down triglycerides into fatty acids and glycerol.

MCQ 97:
Which component of the digestive system produces intrinsic factor?

A) Liver
B) Stomach
C) Pancreas
D) Small intestine

Answer: B) Stomach

Explanation: The stomach produces intrinsic factor, which is necessary for the absorption of vitamin B12.

MCQ 98:
What type of carbohydrate is cellulose considered?

A) Simple sugar
B) Complex carbohydrate
C) Disaccharide
D) Monosaccharide

Answer: B) Complex carbohydrate

Explanation: Cellulose is a complex carbohydrate (fiber) that humans cannot digest but is important for gut health.

MCQ 99:
Which of the following substances does NOT aid in digestion?

A) Bile
B) Saliva
C) Gastric acid
D) Cholesterol

Answer: D) Cholesterol

Explanation: Cholesterol does not play a direct role in digestion, while bile, saliva, and gastric acid all aid in the digestive process.

MCQ 100:
What is the term for the rhythmic contractions that move food through the digestive tract?

A) Segmentation
B) Peristalsis
C) Absorption
D) Emulsification

Answer: B) Peristalsis

Explanation: Peristalsis refers to the wave-like muscle contractions that move food through the digestive tract.