The $\alpha$-helix structure is found in which of the following?

Which of the statements about "Denaturation" given below are correct?
$A$. Denaturation of proteins causes loss of secondary and tertiary structures of the protein
$B$. Denaturation leads to the conversion of double strand of $DNA$ into single strand
$C$. Denaturation affects primary structure which gets distorted

$A$ short peptide on complete hydrolysis produces $3$ moles of glycine $(G)$,$2$ moles of leucine $(L)$ and $2$ moles of valine $(V)$ per mole of peptide. The number of peptide linkages in it are $..............$.

The naturally occurring amino acid that contains only one basic functional group in its chemical structure is

Which amino acid is present as a monomer in the polymer $Nylon-2-nylon-6$?

Choose the peptide that matches the abbreviation $Phe-Val-Ala$.