Which step in photosynthesis does not need light?(1 point)
Responses
Chlorophyll absorbs energy.
Chlorophyll absorbs energy.
Water splits into hydrogen and oxygen.
Water splits into hydrogen and oxygen.
Oxygen is released.
Oxygen is released.
Carbon dioxide and hydrogen combine to make glucose.
Carbon dioxide and hydrogen combine to make glucose.
The step in photosynthesis that does not need light is when water splits into hydrogen and oxygen.
The step in photosynthesis that does not require light is the splitting of water into hydrogen and oxygen. This is known as the light-independent or dark reaction, which takes place in the stroma of the chloroplasts. To arrive at this answer, you can recall the basic process of photosynthesis:
1. In the presence of light, chlorophyll absorbs energy from the sunlight.
2. Water molecules are then split through a process called photolysis, which releases oxygen gas and hydrogen ions.
3. The released oxygen is a byproduct and is released into the atmosphere.
4. The hydrogen ions produced during photolysis combine with carbon dioxide in the stroma to form glucose, a sugar molecule.
Therefore, the correct step that does not require light is when water splits into hydrogen and oxygen.