Interferon is connected with:

Identify a protein present in nails

Which of the following tests cannot be used for identifying amino acids?

Which of the following are sulphur-containing amino acids?

$(A)$. Serine	$(B)$. Cysteine
$(C)$. Lysine	$(D)$. Methionine

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

Thyroxine produced in the thyroid gland is an iodinated derivative of