$A$ bond formed between the $C$-terminal of one amino acid and the $N$-terminal of another amino acid is known as:

Besides having $C, H, O$,which of the following also contains nitrogen $(N)$?

The structure of insulin consists of two polypeptide chains $A$ and $B$. These two polypeptide chains

Which of the following is essential for the growth of the body and the formation of new cells?

The diversity observed in protein molecules is primarily due to the diversity of which of the following?

Which of the following statement$(s)$ is/are true?
$(i)$ All amino acids contain one chiral centre.
$(ii)$ Some amino acids contain one, while some contain more chiral centres or even no chiral centre.
$(iii)$ All amino acids in proteins have $L$-configuration.
$(iv)$ All amino acids found in proteins have $1^{\circ}$ amino group.