Which one of the following is an essential amino acid?

Which from the following is $NOT$ a globular protein?

The correct sequence of amino acids present in the tripeptide given below is

What are the hybridisation of the carbon atoms labeled $C_1$ and $C_2$,respectively in glycine?

The value of $x$ in compound '$D$' is $.........$.

The list given below contains essential amino acids that are basic $(X)$ and also non-essential amino acids that are neutral $(Y)$. Identify $X$ and $Y$ from the following list:
$a)$ Lysine
$b)$ Alanine
$c)$ Serine
$d)$ Arginine
$e)$ Tyrosine