Lactic acid is formed in

Identify the products marked by $(i)$ and $(ii)$ in the following pathway:
$3$-phosphoglyceric acid $\rightarrow$ $(i)$ $\rightarrow$ Pyruvate $\rightarrow$ $(ii)$ (with $NADH + H^+$ being converted to $NAD^+$)

Pasteur's effect is

During anaerobic respiration in yeast,what are the end-products?

Hydrogen acceptor in alcohol fermentation is . . . . . . .

In alcohol fermentation, . . . . . . of energy in glucose is released and not all of it is trapped as high energy bonds of $ATP$.