Question

How do plants recycle carbon during photosynthesis?

1. The carbon in carbon dioxide is recycled as glucose.

2. The carbon in glucose is recycled as carbon gas.

3. The carbon in glucose is recycled as carbon dioxide.

4. The carbon in carbon gas is recycled as glucose.

Anwser A The carbon dioxide is recycled as glucose

How do plants recycle hydrogen during cellular respiration?

1. The hydrogen in water is recycled as glucose.

2. The hydrogen in hydrogen gas is recycled as glucose.

3. The hydrogen in glucose is recycled as water.

4. The hydrogen in glucose is recycled as hydrogen gas.

Anwser 3 The hydrogen is glucose is recycled as water

How many molecules of water are recycled into one molecule of glucose during photosynthesis?

1. 3

2. 1

3. 12

4. 6

Anwser 4. 6

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 into fat.

2. It was recycled into glucose.

3. It was recycled into hydrogen gas.

4. It was recycled into water.

Anwser 2. It was recycled into glucose

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Answer 1

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