21. Which of the following statements is false? A. Primary structure determines

Question

21. Which of the following statements is false? A. Primary structure determines the three-dimensional structure of a protein. B. The peptide bond has considerable double-bond character C. The partial double-bond character prevents rotation about the peptide bond D. The distance between the C-N of the peptide bond is longer the typical single bond between C and N E. The angle of rotation about the bond between the a-carbon atom and the carbonyl carbon is called psi (w). 22. Which of the following is false? A. The side chains of amino acids composing the a-Helix extend inward into the interior of the helix B. The CO group of each amino acid forms a hydrogen bond with the NH group of the amino acid that is situated four residues ahead in the sequence C. Per turn of the Helix, there are 3.6 amino acid residues D. An -Helix 45 Anstrons, in length consists of approximately 30 amino acids E. The amino acid proline is an a-Helix breaker because its ring structure 8 prevents it from assuming the phi (p) value to fit into an a-Helix.

Explanation / Answer

Answer 21:

Atatement A is false because it is the tertiary structure which determine the three-dimensional structure of monomeric and multimeric protein molecules.

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