Question

Why do you need to breathe in oxygen?

a.Oxygen is needed to split glucose.
b.Oxygen provides energy that is to be put into ATP.
c.Oxygen pulls electrons through the process of cell respiration.
d.Oxygen reduces the NAD+ and FADH to produce NADH and FADH2

Answer 1

a

Step-by-step explanation:

Breathing in of oxygen is respiration. And respiration is the taken in of oxygen to break down glucose and energy in form of ATP as by product

Answer 2

C. O2 pulls electrons through the process of cell respiration