Scientist use radioactive hydrogen to make water. They grew plants using the radioactive water, what happened to the radioactive hydrogen during the cellular respiration

Question

It was recycled into water
It was recycled into glucose
It was recycled into protein
It was recycled into hydrogen gas

Answer 1

The correct answer is "It was recycled into water." During cellular respiration, stored energy in glucose is released and combined with oxygen to produce water, carbon dioxide, and ATP (adenosine triphosphate). The radioactive hydrogen used to make water during the plant growth is incorporated into the water molecules produced during cellular respiration.