Each of the following statements about the anti-parallel pleated sheet is true EXCEPT which one?
A) Adjacent polypeptide chains run in the same direction.
B) Adjacent polypeptide chains run in opposite directions.
C) It gives a characteristic x-ray diffraction pattern.
D) It gives a characteristic circular dichroism curve.
E) amino acids with short side-chains promote its formation.

Question

Quizplus · Accepted Answer

The statement "Adjacent polypeptide chains run in the same direction" is not true for anti-parallel pleated sheets. In anti-parallel pleated sheets, adjacent polypeptide chains run in opposite directions, as stated in option B. Options C and D are true because anti-parallel pleated sheets give a characteristic x-ray diffraction pattern and circular dichroism curve. Option E is also true because amino acids with short side-chains, such as glycine and alanine, promote the formation of anti-parallel pleated sheets. Therefore, option A is the only statement that is not true for anti-parallel pleated sheets.

Each of the Following Statements About the Anti-Parallel Pleated Sheet