The end product of glycolysis is

Besides the net gain of $2 \ ATP$ molecules in glycolysis,which other molecules are simultaneously formed?

How many $NADH + H^+$ molecules are produced during the process of glycolysis?

If $3$ molecules of $PGAL$ complete glycolysis,how much $ATP$ and $NADH_2$ will be formed?

The conversion of fructose-$6$-phosphate to fructose-$1,6$-bisphosphate during respiration requires which of the following enzymes?

Identify the chemical compounds represented by the following formulas:
$(1)$ $CH_3CH(OH)COOH$
$(2)$ $CH_3COCOOH$