Question

Science Quick Check. 1 Right Answer Per Question.

1. How do plants recycle carbon during photosynthesis?
a. The carbon in glucose is recycled during photosynthesis.
b. The carbon in water is recycled during photosynthesis.
c. The carbon in carbon dioxide is recycled during photosynthesis.
d. The carbon in oxygen molecules is recycled during photosynthesis.

2. Scientists used radioactive hydrogen to make water. They grew plants using the radioactive water. What happened to the radioactive hydrogen during photosynthesis?
a. It was recycled when hydrogen gas was formed.
b. It was recycled when water was formed.
c. It was recycled when glucose was formed.
d. It was recycled when light energy was formed.

3. How many molecules of water are recycled when one molecule of glucose is created during photosynthesis?
a. 6
b. 3
c. 12
d. 1

4. How do plants recycle hydrogen during cellular respiration?
a. The hydrogen in hydrogen gas is recycled when glucose is formed.
b. The hydrogen in glucose is recycled when water is formed.
c. The hydrogen in glucose is recycled when hydrogen gas is formed.
d. The hydrogen in water is recycled when glucose is formed.

Answer 1

Here are the correct answers for each question:

1. **c. The carbon in carbon dioxide is recycled during photosynthesis.**

2. **c. It was recycled when glucose was formed.**

3. **a. 6**

4. **b. The hydrogen in glucose is recycled when water is formed.**