Question

______ is the polysaccharide most commonly found in highly fibrous foods such as celery.

a) glycogen

b) chitin

c) starch

d) cellulose

Explanation:

To solve this, we analyze each option:

• Option A: Glycogen is a polysaccharide stored in animal cells (like liver and muscle), not in fibrous plant foods like celery.
• Option B: Chitin is a polysaccharide found in the exoskeletons of arthropods (e.g., insects, crustaceans) and fungal cell walls, not in celery.
• Option C: Starch is a polysaccharide used for energy storage in plants (e.g., potatoes, grains), not the main polysaccharide in fibrous plant parts like celery.
• Option D: Cellulose is a polysaccharide that forms the structural component of plant cell walls. Fibrous plant foods (like celery) are rich in cellulose, which provides dietary fiber.

Answer:

D) Cellulose