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nmdcat.online July 11, 2026

The specificity of an enzyme like glucokinase for glucose over other hexoses is best explained by the

A. Unique peptide sequence in the enzyme's non-catalytic domain
B. Precise three-dimensional shape and chemical environment of the active site
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C. Regulatory effects of coenzyme NAD+ on the enzyme's structure
D. Enzyme's ability to phosphorylate only six-carbon sugars

📝 Explanation

Enzyme specificity arises from the unique 3D structure of the active site, which contains amino acid R-groups positioned to form interactions only with a specific substrate.

📖 Additional Information

  • Unique peptide sequence in the enzyme's non-catalytic domain
  • Precise three-dimensional shape and chemical environment of the active site
  • Regulatory effects of coenzyme NAD+ on the enzyme's structure
  • Enzyme's ability to phosphorylate only six-carbon sugars

Enzyme specificity arises from the unique 3D structure of the active site, which contains amino acid R-groups positioned to form interactions only with a specific substrate.

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