In anaerobic respiration,acetaldehyde is reduced to form alcohol by utilizing $NADH_2$ obtained from . . . . . . .

Which enzyme catalyzes the reaction: Glucose-$6$-phosphate $(6C)$ $\rightarrow$ Fructose-$6$-phosphate $(6C)$?

How many $ATP$ are used in glycolysis,or for the complete phosphorylation of a glucose molecule,how many $ATP$ molecules are required?

The end product of glycolysis is ......... .

Glycolysis:
$I$. Causes partial oxidation of glucose (one molecule) to form $2$ molecules of pyruvic acid and $2$ $ATP$ as net gain.
$II$. Takes place in all living cells.
$III$. Uses $2$ $ATP$ at two steps.
$IV$. Scheme was given by Gustav Embden,Otto Meyerhof,and $J$. Parnas.
Choose the correct option containing appropriate statements from the above.

The first phase in the breakdown of glucose in animal cells is