Which of the following does not function as an electron carrier?

When energy is released from $FADH_2$,through which complex do electrons $NOT$ pass?

The correct sequence of electron acceptors in $ATP$ synthesis is:

Given below are two statements.
Statement-$I$: During aerobic respiration,$ETS$ regenerates co-enzymes such as $NAD^+$ and $FAD^+$ from their reduced forms $NADH + H^+$ and $FADH_2$.
Statement-$II$: During aerobic respiration,$ETS$ generates a major amount of energy in the form of $ATP$ molecules.
In the light of the above statements,choose the correct answer from the options given below.

Cytochromes are found in

Both respiration and photosynthesis require the following: