Which step in photosynthesis does not need light?
responses
carbon dioxide and hydrogen combine to make glucose
carbon dioxide and hydrogen combine to make glucose
chlorophyll absorbs energy
chlorophyll absorbs energy
water splits into hydrogen and oxygen
water splits into hydrogen and oxygen
oxygen is released
oxygen is released
The step in photosynthesis that does not require 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. To understand this process, let's break it down:
Photosynthesis is a complex process that occurs in plants, algae, and some bacteria. It is the process through which these organisms convert light energy from the sun into chemical energy in the form of glucose (a sugar) and release oxygen as a byproduct. Photosynthesis takes place in special organelles called chloroplasts, which contain a green pigment called chlorophyll.
The overall equation for photosynthesis is:
6CO2 + 6H2O + light energy → C6H12O6 + 6O2
This equation shows that carbon dioxide (CO2) and water (H2O), in the presence of light energy, are converted into glucose (C6H12O6) and oxygen (O2).
The first step in photosynthesis is the absorption of light energy by chlorophyll molecules. This energy is used to power the following steps. However, there is one step, known as the light-independent reactions or the Calvin cycle, in which light is not directly required.
In the light-independent reactions, the energy stored in ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate) molecules, which were produced during the previous steps that involved light, is utilized. In this step, carbon dioxide (CO2) and hydrogen (derived from the breakdown of water) combine to form glucose (C6H12O6). The chemical reactions involved in this process do not rely on light directly but use the energy carriers (ATP and NADPH) produced in the light-dependent reactions.
So, to answer your question, the step in photosynthesis that does not require light is when water (H2O) is split into hydrogen (H) and oxygen (O2).