Oxidative phosphorylation is related to the formation of

Given below are two statements.
$Statement-I$: During aerobic respiration, $ETS$ releases energy in a stepwise manner to prevent damage to cells.
$Statement-II$: During aerobic respiration, $ETS$ provides water molecules.
In the light of the above statements, choose the correct answer from the options given below.

The substance which is essential for both respiration and photosynthesis is:

Which of the following is a more accurate statement about respiration?

The last electron acceptor in respiration is

In cellular respiration,$O_2$ is used as a final electron acceptor of