Which of the following statements describing the alpha_helix is NOT correct?
A) It is found in globular proteins in both aqueous and membrane environments.
B) It may have a surface that is amphipathic (hydrophobic on one side and hydrophilic on the other).
C) Prolines are positioned at intervals of three or four residues.
D) Side chains (R groups) pointing away from the core of the helix may stabilize its conformation.
E) There are about 3.5 amino acid residues in each turn.

Question

Quizplus · Accepted Answer

Prolines are known to disrupt the alpha-helix structure and are typically found in turns or loops between secondary structures, not within the helix itself. Therefore, the statement "Prolines are positioned at intervals of three or four residues" is not correct.

Which of the Following Statements Describing the Alpha_helix Is NOT