Each turn of helix has_ amino acid.
Correct answer: B. 27
- A. 20
- B. 27
- C. 15
- D. All
Explanation
X-ray analysis has shown that on the average there are 27 amino acid units for each turn of the helix.
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Proteins are polymers of amino acids joined by peptide bonds, and their function depends on primary, secondary, tertiary and quaternary structure. The topic covers fibrous and globular proteins, enzymes, antibodies, hormones and transport proteins, as well as denaturation by heat or extreme pH.
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