Cellular respiration occurs in . . . . . . .

How many statements from the following are correct?
$(a)$ In plants,phosphorylation occurs by three different ways.
$(b)$ Substrate level phosphorylation is a direct phosphorylation of $ADP$ by transfer of a phosphate group from any suitable substance.
$(c)$ Substrate level phosphorylation occurs in the cytoplasm of the cell only.
$(d)$ Oxidative phosphorylation occurs on the inner mitochondrial membrane only.

The reduction of $NADP$ to $NADP·H_2$ is associated with:

The main purpose of glycolysis,the Krebs cycle,and the electron transport system is the production of .........

Which statement can be shared by facilitated diffusion and active transport?

The three boxes in this diagram represent the three major biosynthetic pathways in aerobic respiration. Arrows represent net reactants or products. Arrows numbered $4, 8$ and $12$ can all be