In plants,the uptake of $CO_2$ and the release of $O_2$ is a process called .........

$I.$ Initial $CO_{2}$ acceptor
$II.$ Extent of photorespiration
$III.$ Enzyme catalyzing reaction that fixes $CO_{2}$
$IV.$ Presence of Calvin cycle
$V.$ Leaf anatomy
Which one does not differ in a $C_{3}$ and $C_{4}$ plant?

Which of the following is not required in the synthesis of carbohydrates?

Which statement is correct for photosynthesis?

Maximum photosynthesis occurs by ..........

Which one of the following categories of organisms does not evolve oxygen during photosynthesis?