Table of Contents
- 1 What are the reactants for the dark reaction and where do they come from?
- 2 Where does the energy come from to run the dark reaction?
- 3 What reactants are used in the Calvin cycle?
- 4 What are the products of light and dark reactions?
- 5 Which of the following are produced in the dark reactions?
- 6 Where RuBP is found?
- 7 Where does the dark reaction take place in a plant?
- 8 How is energy converted into energy in a dark reaction?
What are the reactants for the dark reaction and where do they come from?
Dark reactions occur in the grana of chlorophyll,and get energy from ATP and NADPH. The reactants are water and carbon dioxide.
Where does the energy come from to run the dark reaction?
After a plant traps sunlight energy in the light-dependent reactions, it needs to use the ATP and NADH it created to make long-term energy storage molecules like glucose. The Calvin cycle is used to do this. Since the cycle does not involve sunlight in any of its reactions, it is considered a dark reaction.
Is electron used in dark reaction?
The light reactions of photosynthesis involve light-driven electron and proton transfers, which occur in the thylakoid membrane, whereas the dark reactions involve the fixation of CO2 into carbohydrate, via the Calvin–Benson cycle, which occurs in the stroma (Figure 3).
Where does the Calvin cycle RuBP come from?
In the Calvin-Benson cycle, RuBP is a product of the phosphorylation of ribulose-5-phosphate (produced by glyceraldehyde 3-phosphate) by ATP.
What reactants are used in the Calvin cycle?
The Calvin Cycle uses the NADPH and ATP from the Light Reactions to “fix” carbon and produce glucose. Carbon dioxide enters the Calvin Cycle when Rubisco attaches it to a 5-carbon sugar. Most plants fix CO2 directly with the Calvin Cycle, so they are called C-3 plants.
What are the products of light and dark reactions?
Difference between Light and Dark Reaction
| Light Reaction | Dark Reaction |
|---|---|
| The end products are ATP and NADPH. | Glucose is the end product. ATP and NADPH help in the formation of glucose. |
| The water molecules split into hydrogen and oxygen. | Glucose is produced. Co2 is utilized in the dark reaction. |
Where does Dark reaction occur?
The dark reactions of photosynthesis occur in the stroma of the chloroplast where they utilize the products of the light reaction. In the dark reaction, plants use carbon dioxide with ATP and NADPH from the light reactions to produce glucose.
How does dark reaction occur?
The dark reaction occurs in the stroma of the chloroplast, where they utilize the products of the light reaction. In the Calvin cycle, the ATP and NADPH formed during light reaction drives the reaction and convert six molecules of carbon dioxide into one sugar molecule, i.e. glucose.
Which of the following are produced in the dark reactions?
Dark reactions are the “synthesis” part of photosynthesis. Glucose is produced during this stage.
Where RuBP is found?
stroma
RUBP is present in the metabolic center of the chloroplast, where Carbon dioxide fixation and synthesis of nucleic acids, sugars, starch, fatty acids, and some chloroplast proteins take place. Complete answer: RUBP is present in the stroma.
What happens to RuBP during photosynthesis?
RUBP Regeneration refers to the cyclical process where the photosynthetic enzyme Rubisco fixes carbon dioxide into the sugars that fuel plant growth and productivity. Only one-sixth of the PGA carbon is converted to sugar—the rest of the carbon is used to recycle RuBP as the cycle continues. …
What are the products of dark reaction?
Where does the dark reaction take place in a plant?
In the dark reaction, plants use carbon dioxide with ATP and NADPH from the light reactions to produce glucose. It takes place in the stroma of the chloroplast. What are the end products of light reactions? The end products of the light reaction are ATP and NADPH, also known as assimilatory powers.
How is energy converted into energy in a dark reaction?
This energy is converted into energy molecules ATP and NADPH by using PS I and PS II. Also, hydrolysis occurs and releases oxygen. Dark reaction is also called carbon-fixing reaction. It is a light-independent process in which sugar molecules are formed from the carbon dioxide and water molecules.
When does the dark reaction occur at night?
No, the dark reaction does not occur at night. It occurs during the day, but the reaction does not use the light directly. Therefore, it is known as the dark reaction.
What are the end products of the light reaction?
The end products of the light reaction are ATP and NADPH, also known as assimilatory powers.
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