Which one of the following is a peptide hormone?

$C_{12}H_{22}O_{11} + H_2O \stackrel{\text{Enzyme A}}{\longrightarrow} C_6H_{12}O_6 + C_6H_{12}O_6$
$\text{Sucrose} \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \text{Glucose} \quad \quad \quad \quad \text{Fructose}$
$C_6H_{12}O_6 \stackrel{\text{Enzyme B}}{\longrightarrow} 2C_2H_5OH + 2CO_2$
$\text{Glucose}$
In the above reactions,the enzyme $A$ and enzyme $B$ respectively are :-

Which of the following hormones is an example of a polypeptide?

An enzyme which brings about the conversion of $Starch$ into $Maltose$ is known as:

$Testosterone$ is responsible for the development of secondary male characteristics like deep voice and facial hair.

Which enzyme converts glucose and fructose both into ethanol?