Question

Scientists used radioactive hydrogen to make water. They grew plants using the radioactive water. What happened to the radioactive hydrogen during photosynthesis?

1) It was recycled when hydrogen gas was formed.
2) It was recycled when light energy was formed.
3) It was recycled when glucose was formed.
4) It was recycled when water was formed.

Answer 1

During photosynthesis, radioactive hydrogen from water is recycled when glucose is formed.

Step-by-step explanation:

During photosynthesis, the radioactive hydrogen in the water is recycled when glucose is formed. Glucose is a sugar molecule that is produced during the process of photosynthesis, and it serves as an important source of energy for plants. The radioactive hydrogen from the water is incorporated into the glucose molecule, allowing the plant to use it as a fuel.