What two things are needed for the light-dependent reactions to take place? -Water and light are needed for light-dependent reactions.
Q. Where does the light-independent reaction occur?
stroma
Table of Contents
- Q. Where does the light-independent reaction occur?
- Q. In which organelle do the light-independent reactions of photosynthesis occur?
- Q. What is required for the light-independent reactions to occur?
- Q. What are examples of light-independent reactions?
- Q. What products of the light-dependent reactions are used in the light independent reactions?
- Q. How is NADP reduced in the light-independent reaction?
- Q. Where is NADP reduced?
- Q. Can you describe the roles of ATP and reduced NADP in the light independent reaction?
- Q. What are the raw materials of the light independent reaction?
- Q. What is the importance of the light independent reactions?
- Q. How does light reaction occur?
Q. In which organelle do the light-independent reactions of photosynthesis occur?
Photosynthesis occurs in the chloroplast, an organelle specific to plant cells. The light reactions of photosynthesis occur in the thylakoid membranes of the chloroplast.
Q. What is required for the light-independent reactions to occur?
The light-independent molecules depend on the energy carrier molecules, ATP and NADPH, to drive the construction of new carbohydrate molecules. After the energy is transferred, the energy carrier molecules return to the light-dependent reactions to obtain more energized electrons.
Q. What are examples of light-independent reactions?
In plants, carbon dioxide (CO2) enters the leaves through stomata, where it diffuses over short distances through intercellular spaces until it reaches the mesophyll cells. Once in the mesophyll cells, CO2 diffuses into the stroma of the chloroplast—the site of light-independent reactions of photosynthesis.
Q. What products of the light-dependent reactions are used in the light independent reactions?
1: The light-dependent reactions of photosynthesis (left) convert light energy into chemical energy, forming ATP and NADPH. These products are used by the light-independent reactions to fix CO2, producing organic carbon molecules.
Q. How is NADP reduced in the light-independent reaction?
Glycerate 3-phosphate (GP) is converted into triose phosphate (TP) using reduced NADP and ATP. The reduced NADP provides the reducing power (hydrogen) and is converted back to NADP which is then reduced again in the light-dependent reactions. ATP is also used to provide energy for the conversion.
Q. Where is NADP reduced?
photosystem I
Q. Can you describe the roles of ATP and reduced NADP in the light independent reaction?
reduced NADP provides reducing power / hydrogens; ATP supplies energy for this reaction; phosphate from ATP; for production of RuBP; Describe how plants absorb light energy from the sun and use this energy to produce useful substances in the light-dependent stage of photosynthesis.
Q. What are the raw materials of the light independent reaction?
In photosynthesis, oxygen, carbon dioxide, ATP, and NADPH are reactants. GA3P and water are products. In photosynthesis, chlorophyll, water, and carbon dioxide are reactants.
Q. What is the importance of the light independent reactions?
What is the biological significance of the light-independent reactions of photosynthesis? They convert carbon dioxide to sugar. They generate ATP and NADPH. They convert ATP to sugar.
Q. How does light reaction occur?
The light reaction occurs in the thylakoids of the chloroplast. When the light hits, chlorophyll a get excited to higher energy state followed by a series of reactions. This energy is converted into energy molecules ATP and NADPH by using PS I and PS II. Also, hydrolysis occurs and releases oxygen.
