In the process of respiration,the potential energy stored in organic compounds is released in the form of:

Select the correct option:
$(1)$ Fermentation / Aerobic respiration does not have an electron transport system.
$(2)$ Combustion / Respiration is a biochemical process.

Select the correct statement regarding microfibrils.

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 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

Select the incorrect statement.