Hormones are secreted by ductless glands of the human body. The iodine-containing hormone is:

The production and function of '$Insulin$' in the body are responsible for the regulation of blood sugar levels. To which of the following classes can this compound be assigned?

Match List-$I$ with List-$II$:

List-$I$ (Enzymatic reaction)	List-$II$ (Enzyme)
$A$. Sucrose $\rightarrow$ Glucose and Fructose	$I$. Zymase
$B$. Glucose $\rightarrow$ Ethyl alcohol and $CO_2$	$II$. Pepsin
$C$. Starch $\rightarrow$ Maltose	$III$. Invertase
$D$. Proteins $\rightarrow$ Amino acids	$IV$. Diastase

Choose the correct answer from the options given below:

Enzymes are

Observe the following reactions:
$I$) $\text{Sucrose} (aq) + H_2O \xrightarrow{x} \text{glucose} + \text{fructose}$
$II$) $\text{Glucose} (aq) \xrightarrow{y} \text{ethanol} + CO_2$
What are $x$ and $y$ respectively?

The site of action of insulin is