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

$80\%$ of the lactic acid is converted to . . . . . . in the liver.

Anaerobic synthesis found in bacteria is

In animal cells,like muscle,during exercise when $O_{2}$ is inadequate for cellular respiration,pyruvic acid is reduced into lactic acid by

Given below are two statements.
$Statement-I$ - Skeletal muscles usually derive energy by anaerobic respiration.
$Statement-II$ - After vigorous exercise,lactic acid accumulates in muscle fibres,leading to muscle fatigue.
In the light of the above statements,choose the most appropriate answer from the options given below:

The process by which there is inhibition of anaerobic respiration by atmospheric oxygen is