Glycogen is stored in-

Correct Answer: B

Rationale: Glycogen is primarily stored in the liver.

Correct Answer: D

Rationale: Mucus is secreted by the stomach, duodenum, and large intestine for protection and lubrication.

Correct Answer: D

Rationale: Humans have three pairs of major salivary glands: parotid, submandibular, and sublingual.

Correct Answer: D

Rationale: Carboxypeptidase is a zinc-dependent enzyme that breaks down proteins into amino acids.

Correct Answer: B

Rationale: Segmentation in the large intestine involves rhythmic contractions that mix contents, increasing contact time with the mucosa for water and electrolyte absorption.