Each time you take a breath you are bringing in the oxygen you need to stay alive. The ultimate source of the oxygen used by all aerobic organisms comes from a reaction that
A)degrades carbon dioxide.
B)hydrolyzes ATP.
C)splits water.
D)reduces NADPH.

Question

Quizplus · Accepted Answer

The ultimate source of oxygen used by all aerobic organisms comes from the splitting of water during photosynthesis in plants. This process is called photolysis, and it releases oxygen gas as a byproduct. The oxygen released during photosynthesis is then used by aerobic organisms to carry out cellular respiration, which enables them to produce ATP for energy. Therefore, the correct answer is C, which is the option that describes the process of water splitting during photosynthesis.

Each Time You Take a Breath You Are Bringing in the Oxygen