Among the following,the achiral amino acid is

Can an enzyme be called a polymer?

Enlist the points of difference between fibrous and globular proteins.

Which of the following statements are correct?
$A$) $\alpha$-amino acids present in proteins are $L$-amino acids.
$B$) Amino acids contain both $-NH_2$ and $-COOH$ groups.
$C$) The number of amino groups and carboxylic groups is always the same in amino acids.
$D$) Tyrosine was first obtained from cheese.
Choose the correct alternatives from below:

Explain the classification of proteins based on their molecular structure.

Which statement is correct for the protein hemoglobin?