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BIO NMDCAT Carbohydrates
nmdcat.online June 27, 2026

The main reason that the structure of glycogen is more suitable for rapid energy mobilization in animal tissues than starch in plants is its

A. Lower molecular weight, allowing for faster diffusion
B. Higher degree of branching, which provides more non-reducing ends for enzymatic attack
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C. Exclusive presence of α-1,4 linkages, which are easier to hydrolyze
D. Association with lipid droplets in the cytoplasm

📝 Explanation

Glycogen's extreme branching creates a compact, highly soluble granule with thousands of terminal non-reducing ends. Enzymes like glycogen phosphorylase and debranching enzyme can work simultaneously at multiple ends, releasing glucose-1-phosphate far faster than from the less branched amylopectin of starch.

📖 Additional Information

  • Lower molecular weight, allowing for faster diffusion
  • Higher degree of branching, which provides more non-reducing ends for enzymatic attack
  • Exclusive presence of α-1,4 linkages, which are easier to hydrolyze
  • Association with lipid droplets in the cytoplasm

Glycogen's extreme branching creates a compact, highly soluble granule with thousands of terminal non-reducing ends. Enzymes like glycogen phosphorylase and debranching enzyme can work simultaneously at multiple ends, releasing glucose-1-phosphate far faster than from the less branched amylopectin of starch.

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