During the dark reaction,the acceptor of $CO_{2}$ is

Chloroplast contains the maximum quantity of which enzyme?

$A-$ RuBisCO,which is the most abundant enzyme in the world,is characterized by the fact that its active site can bind to both $CO_2$ and $O_2$.
$R-$ RuBisCO is the most abundant enzyme in the world.

In plants, the reduction of $CO_2$ and the synthesis of $ATP$ are interrelated. In this process, $ATP$ is ...

$RuBP + CO_2 + H_2O \xrightarrow{RuBisCO} \dots$

The path of $CO_2$ in the dark reaction of photosynthesis was successfully traced by using which of the following?