$A$ photosystem is composed of $..............$.

Statement $P$: During the dark reaction of photosynthesis,ketotriose is synthesized.
Statement $Q$: The sugar present in the structure of $ATP$ is an example of a ketopentose sugar.

The phenomenon which converts light energy into chemical energy is:

Match the following columns correctly:

Column-$I$	Column-$II$
$(1)$ Cyclic photophosphorylation	$(a)$ Only $PS-I$
$(2)$ Non-cyclic photophosphorylation	$(b)$ $ATP$ formed
$(3)$ $C_4$ cycle	$(c)$ Meristematic tissue
	$(d)$ High productivity

Which of the following ions of heavy metals participate in the process of photosynthesis in higher plants?

The energy of a mole of light quanta is $72 \ kcal$ in the blue region at $400 \ nm$ and $41 \ kcal$ in the red region at $700 \ nm$. How much light energy would be required under standard conditions to make $1 \ mole$ of glucose costing $686 \ kcal$?