For many biochemical reactions,$H^+$ and $OH^-$ ions are obtained from which of the following?

The ready source of energy in living cells is

Assertion $(S)$: The measure of disorder in a biological system is called free energy.
Reason $(R)$: The energy available in a biological system to perform work is called entropy.
$(A)$ Both $S$ and $R$ are true,and $R$ is the correct explanation of $S$.
$(B)$ Both $S$ and $R$ are true,but $R$ is not the correct explanation of $S$.
$(C)$ $S$ is true and $R$ is false.
$(D)$ $S$ is false and $R$ is true.
$(E)$ Both $S$ and $R$ are false.

Match the following columns:

Column $I$	Column $II$
$(A)$ Chlorine	$(i)$ Outer surface of aerial parts of plants
$(B)$ $DHAP$	$(ii)$ Structural component of plant cell wall
$(C)$ Cellulose	$(iii)$ Osmoregulation in blood
$(D)$ Crotonic acid	$(iv)$ Phosphorylated ketotriose
$(E)$ Wax	$(v)$ Unsaturated fatty acid

How many water molecules are present in the given figure?

Match the following:

$(a)$ Inhibitor of catabolic reaction	$(i)$ Ricin
$(b)$ Contains peptide bond	$(ii)$ Malonate
$(c)$ Cell wall material in fungi	$(iii)$ Chitin
$(d)$ Secondary metabolite	$(iv)$ Collagen

Select the correct option: