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Sagot :
To determine which component should be added to complete the chemical equation for photosynthesis, let's analyze the process of photosynthesis step by step.
Photosynthesis is a process used by plants and other organisms to convert light energy, usually from the sun, into chemical energy that can later be released to fuel the organism's activities. The overall biochemical reaction can be simplified as:
[tex]\[ 6 \, CO_2 + 6 \, H_2O \rightarrow C_6H_{12}O_6 + 6 \, O_2 \][/tex]
This equation summarizes the conversion of carbon dioxide and water into glucose (a type of sugar) and oxygen. However, this summary overlooks a key component: the energy source that drives this process.
### Steps Involved in Photosynthesis:
1. Light-Dependent Reactions:
- These reactions occur in the thylakoid membranes of the chloroplasts where light energy is absorbed by chlorophyll.
- This energy is used to split water molecules (photolysis), releasing oxygen as a byproduct and transferring energy to form ATP and NADPH.
2. Calvin Cycle (Light-Independent Reactions):
- This series of reactions occurs in the stroma of the chloroplast.
- ATP and NADPH produced in the light-dependent reactions are used to convert carbon dioxide and water into glucose.
Given the components mentioned:
- ATP and NADPH: These are high-energy molecules produced during the light-dependent reactions and are used in the Calvin cycle to synthesize glucose. While essential to the process, ATP and NADPH are more of intermediate energy carriers rather than components directly added to the chemical equation.
- Chemical Energy: A term that collectively refers to the energy stored in chemical bonds, typically resulting from the conversion of light energy. Essential to the process, but not a specific substance you add to the equation.
- Rubisco: An enzyme crucial for carbon fixation in the Calvin cycle. It catalyzes the first major step of converting carbon dioxide to organic molecules. It is essential but specific to one part of the process rather than being a general energy source for the overall reaction.
- Light Energy: It is the primary energy source that drives the entire process of photosynthesis. The light-dependent reactions cannot occur without this component.
### Conclusion:
The component that completes the chemical equation for photosynthesis is light energy. This energy is crucial to start the reactions that ultimately produce glucose and oxygen from carbon dioxide and water.
Therefore, the correct answer is:
light energy
Photosynthesis is a process used by plants and other organisms to convert light energy, usually from the sun, into chemical energy that can later be released to fuel the organism's activities. The overall biochemical reaction can be simplified as:
[tex]\[ 6 \, CO_2 + 6 \, H_2O \rightarrow C_6H_{12}O_6 + 6 \, O_2 \][/tex]
This equation summarizes the conversion of carbon dioxide and water into glucose (a type of sugar) and oxygen. However, this summary overlooks a key component: the energy source that drives this process.
### Steps Involved in Photosynthesis:
1. Light-Dependent Reactions:
- These reactions occur in the thylakoid membranes of the chloroplasts where light energy is absorbed by chlorophyll.
- This energy is used to split water molecules (photolysis), releasing oxygen as a byproduct and transferring energy to form ATP and NADPH.
2. Calvin Cycle (Light-Independent Reactions):
- This series of reactions occurs in the stroma of the chloroplast.
- ATP and NADPH produced in the light-dependent reactions are used to convert carbon dioxide and water into glucose.
Given the components mentioned:
- ATP and NADPH: These are high-energy molecules produced during the light-dependent reactions and are used in the Calvin cycle to synthesize glucose. While essential to the process, ATP and NADPH are more of intermediate energy carriers rather than components directly added to the chemical equation.
- Chemical Energy: A term that collectively refers to the energy stored in chemical bonds, typically resulting from the conversion of light energy. Essential to the process, but not a specific substance you add to the equation.
- Rubisco: An enzyme crucial for carbon fixation in the Calvin cycle. It catalyzes the first major step of converting carbon dioxide to organic molecules. It is essential but specific to one part of the process rather than being a general energy source for the overall reaction.
- Light Energy: It is the primary energy source that drives the entire process of photosynthesis. The light-dependent reactions cannot occur without this component.
### Conclusion:
The component that completes the chemical equation for photosynthesis is light energy. This energy is crucial to start the reactions that ultimately produce glucose and oxygen from carbon dioxide and water.
Therefore, the correct answer is:
light energy
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