CAPE Biology Unit 1 · 2008 (Rest of Region) · Paper 1 · Question Q5
Collagen consists of three polypeptide chains held together by H-bonds - NH groups and -CO- groups. Which of the following terms describes the structure of collagen?
- (A)A triple helix
- (B)An
\alpha-helix - (C)A double helix
- (D)A
\beta-helix
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