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

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.

What is oxidative phosphorylation?

In $ETS,$ complex $II$ is .........

Which one of the following is the terminal electron acceptor?

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