What is wrong with this diagram of secondary structure in a polypeptide chain?

A)It has two amino ends.
B)The directionality of the polypeptide chain reverses orientation between the arrows representing a $\beta$ sheet.
C)$\beta$ sheets cannot form when the arrows are pointed in opposite directions.
D)Nothing is wrong with the diagram.

Question

What is wrong with this diagram of secondary structure in a polypeptide chain?

A)It has two amino ends. 
B)The directionality of the polypeptide chain reverses orientation between the arrows representing a $\beta$ sheet. 
C)$\beta$ sheets cannot form when the arrows are pointed in opposite directions. 
D)Nothing is wrong with the diagram.

Quizplus · Accepted Answer

The Answer is A

What Is Wrong with This Diagram of Secondary Structure in a Polypeptide