In dark reaction,the first reaction is

Why is the $RuBisCo$ enzyme more appropriately called $RuBP$ Carboxylase-Oxygenase and what important role does it play in photosynthesis?

$ATP$ and $NADH$ (or $NADPH$),which are synthesized in the photochemical reaction,are used in which phase?

How many molecules of water are required to complete one Calvin cycle?

$3 CO_{2} + 9 ATP + 6 NADPH + \text{water} \rightarrow \text{glyceraldehyde 3-phosphate} + 9 ADP + 6 NADP^{+} + 8 \Pi$. Analyse the above reaction and answer the following questions:
$(a)$ How many molecules of $ATP$ and $NADPH$ are required to fix one molecule of $CO_{2}$?
$(b)$ Where in the chloroplast does this process occur?

What is the change in reduction in Calvin cycle?