本题目来源于试卷: Form and Function B.2 Proteins，类别为 IB生物学
[单选题]
Which of the followinh22t;9d9g (ujxe avlw g is a distinguishing charact k q h21lrsb,v3n9ev4beristic of the quaternary structure os 9v2,h1lerqn3b vbk4f a protein?
A. The amino acid chain is arranged into an alpha helix
B. The amino acid chain is arranged into beta-pleated sheets
C. Polypeptide chains are held together by R-group interactions
D. The amino acid sequence of the protein is held together by peptide bonds
参考答案: C
本题详细解析:
The quaternary structure of a protein can relate to the number of amino acid chains which make up the protein. These chains are held together by R-group interactions (Choice C). Choices A and B relate to the secondary structure of a protein. Choice D refers to the primary structure of a protein.
| 
