Which is the most important structural component of the body?

Identify the given amino acid.

Which functional group is involved in the formation of disulfide bonds in proteins?

Based on which group can amino acids be classified?

Which of the following statements are correct regarding amino acids?
$A$. They are substituted methanes.
$B$. Serine is an aromatic amino acid.
$C$. Valine is a neutral amino acid.
$D$. Lysine is an acidic amino acid.
Choose the correct answer from the options given below:

Which of the following amino acids are non-polar? $(1)$ Arginine $(2)$ Leucine $(3)$ Proline $(4)$ Serine $(5)$ Lysine $(6)$ Methionine $(7)$ Glycine $(8)$ Valine $(9)$ Threonine