How many molecules of $CO_2$ are released during the complete oxidation of one molecule of pyruvic acid?

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

Breakdown of complex molecules to yield energy takes place in

Select the correct option regarding the following statements:
$(1)$ During glycolysis/fermentation,$2 \, ATP$ molecules are produced from one molecule of glucose.
$(2)$ If the respiratory substrate is fat/carbohydrate,the $RQ$ of the respiring cells is less than one.

During how many steps is Co-$A$ used in aerobic respiration?

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.