During respiration,pyruvic acid is formed by

Conversion of fructose-$6$-phosphate to fructose-$1,6$-bisphosphate is catalysed by:

How many water molecules are used in glycolysis?

What is the net gain of $ATP$ when each molecule of glucose is converted to two molecules of pyruvic acid?

$A-$ During glycolysis,$2$ $ATP$ and $2$ $NADH_2$ are formed.
$R-$ $2$ $ATP + 2$ $FADH_2 + 4$ $NADH_2$ are produced during glycolysis.

Provide the full names for the following abbreviations:
$(1)$ $PEP$
$(2)$ $TPP$