Draw a cysteine amino acid $($a$)$ at a very low $pH$ and $($b$)$ at a very high $pH.$

a$.$ Would the side chains of two cysteine amino acids form a stronger non$-$covalent interaction in a solution with a very low $pH$ or a very high $pH?$

b$.$ What type of non$-$covalent interaction would they form?

c$.$ Draw two cysteine amino acids showing exactly how their side chains would form this stronger non$-$covalent interaction.

What is the strongest non$-$covalent interaction that can be formed between the side chain of lysine and water in a solution with a $pH$ of $11\mathrm{.}0?$ Draw these two molecules interacting.

Would the side chains of two glutamic acid molecules form a stronger non$-$covalent interaction at a $pH$ of $3\mathrm{.}0$ or $6\mathrm{.}0?$ Clearly justify your answer.

Please try to answer all. Will give thumbs up