$CO_2$ joins the photosynthetic pathway during

The dark reaction of photosynthesis takes place in:

Name the phosphorylated aldotriose synthesized during the dark reaction of photosynthesis.

Select the correct option for photosynthesis in $C_3$-plants.

During photosynthesis,when $PGA$ is converted into phosphoglyceraldehyde,which of the following reactions occurs?

$3 CO_{2} + 9 ATP + 6 NADPH + \text{water} \rightarrow \text{glyceraldehyde 3-phosphate} + 9 ADP + 6 NADP^{+} + 8 Pi$. 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?