Melvin Calvin used ....... to separate the various chemicals formed during the Calvin cycle.

......... is the first process of the dark reaction.

Where is $NADPH+H^{+}$ used?

The first stable product of the Calvin cycle has:

What is the process of carboxylation in the context of photosynthesis?

$A-$ 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.