| Item $I$ | Item $II$ |
| $A$ Ester test | $P$ Tyr |
| $B$ Carbylamine test | $Q$ Asp |
| $C$ Phthalein dye test | $R$ Ser |
| $S$ Lys |
$(I)$ Glucose
$(II)$ Fructose
$(III)$ Maltose
$(IV)$ Sucrose
$(V)$ Galactose
The amount of energy required to split the double strand $DNA$ into two single strands is . . . .kcal $mol ^{-1}$.
[Given: Average energy per $H$-bond for $A - T$ base pair $=1.0 kcal mol ^{-1}, G - C$ base pair $=1.5 kcal mol ^{-1}$, and $A - U$ base pair $=1.25 kcal mol ^{-1}$. Ignore electrostatic repulsion between the phosphate groups.]