The bond that determines the secondary structure of a protein is

Which one of the following statements is not correct?

Choose the correct Zwitter ionic form for aspartic acid.

Which of the following compounds is an amino acid?

Identify the basic amino acid from the following.

Assertion $(A)$: An optically active amino acid can exist in three forms depending on the $pH$ of the solution.
Reason $(R)$: Amino acids contain both acidic and basic groups; they exist as a zwitterion in aqueous medium,anionic form in basic medium,and cationic form in acidic medium.