How do plants recycle carbon during photosynthesis?(1 point)
Responses
The carbon in carbon dioxide is recycled during photosynthesis.
The carbon in glucose is recycled during photosynthesis.
The carbon in oxygen molecules is recycled during photosynthesis.
The carbon in water is recycled during photosynthesis.
The hydrogen in glucose is recycled when water is formed.
The carbon in carbon dioxide is recycled during photosynthesis.
Scientists used radioactive hydrogen to make water. They grew plants using the radioactive water. What happened to the radioactive hydrogen during photosynthesis?(1 point)
It was recycled when glucose was formed.
The correct response is
The carbon in carbon dioxide is recycled during photosynthesis.
6
The correct response is: The carbon in carbon dioxide is recycled during photosynthesis.
During photosynthesis, plants use sunlight, water, and carbon dioxide to produce glucose and oxygen. Carbon dioxide (CO2) is a gas that contains carbon. Plants take in carbon dioxide from the air through tiny openings in their leaves called stomata.
Inside the plant's cells, the carbon from carbon dioxide is extracted and combined with water molecules to create glucose (C6H12O6). Glucose is a type of sugar that serves as the primary source of energy for the plant.
As a result of this process, which is powered by sunlight, the carbon in carbon dioxide is "fixed" in the form of glucose. This means that the carbon is converted into an organic compound that can be used by the plant for growth and metabolism.
So, during photosynthesis, plants effectively recycle the carbon from carbon dioxide by incorporating it into glucose.
How do plants recycle hydrogen during cellular respiration?(1 point)
Responses
The hydrogen in water is recycled when glucose is formed.
The hydrogen in glucose is recycled when water is formed.
The hydrogen in glucose is recycled when hydrogen gas is formed.
The hydrogen in hydrogen gas is recycled when glucose is formed.
How many molecules of water are recycled when one molecule of glucose is created during photosynthesis?(1 point)
Responses
12
3
6
1
Correct response. The radioactive hydrogen in the water used by the plants during photosynthesis would have been incorporated into glucose, thus recycling it in the form of glucose.
Scientists used radioactive hydrogen to make water. They grew plants using the radioactive water. What happened to the radioactive hydrogen during photosynthesis?(1 point)
Responses
It was recycled when hydrogen gas was formed.
It was recycled when water was formed.
It was recycled when glucose was formed.
It was recycled when ligh energy was formed.