Question

I need answer with explanation​

Answer 1

Primary structure of a protein is simply the amino acid sequence which has two ends the carboxyl and amino terminals.

So, the correct answer is option (a)

Answer 2

$\huge \bigstar \underline {\color{lightblue}\mathfrak{ answer}} \bigstar$

$\sf \: the \: primary \: structure \: of$

$\sf \: protein \: molecules \: has$

$\huge \underline{ \sf \color{pink}2 \: ends}$