BIO NMDCAT Carbohydrates

nmdcat.online June 27, 2026

The most abundant organic molecule in the biosphere, serving as the primary structural component of plant cell walls, is

A. Starch

B. Glycogen

C. Chitin

D. Cellulose

✓

📝 Explanation

Cellulose is a homopolymer of β-D-glucose and constitutes the majority of plant biomass. Its annual production is estimated to be over 10¹¹ tons, making it the most abundant organic compound on Earth. Starch and glycogen are storage, not structural, polymers.

📖 Additional Information

Starch
Glycogen
Chitin
Cellulose

Cellulose is a homopolymer of β-D-glucose and constitutes the majority of plant biomass. Its annual production is estimated to be over 10¹¹ tons, making it the most abundant organic compound on Earth. Starch and glycogen are storage, not structural, polymers.

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