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Mark the incorrect statement
- a)Low PH present in lumen of thylakoid involve in ATP synthesis
- b)Breakdown of Gradient occur with the help of channel of proton which release energy
- c)Biosynthetic phase occur in stroma of chloroplast
- d)biosynthetic phase require product of light reaction like NADPH, ATP and CO2
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Mark the incorrect statementa)Low PH present in lumen of thylakoid inv...
Incorrect Statement: d) Biosynthetic phase does not require products of light reactions like NADPH, ATP, and CO2.
Explanation:
The biosynthetic phase of photosynthesis, also known as the Calvin cycle or the dark reaction, occurs in the stroma of the chloroplast. It involves the conversion of carbon dioxide (CO2) into glucose using the energy obtained from the light reactions.
The Calvin cycle is a series of enzymatic reactions that can be divided into three main stages: carbon fixation, reduction, and regeneration.
1. Carbon Fixation:
- The enzyme RuBisCO (Ribulose-1,5-bisphosphate carboxylase/oxygenase) fixes carbon dioxide by combining it with RuBP (Ribulose-1,5-bisphosphate), a 5-carbon compound.
- This results in the formation of an unstable 6-carbon compound, which immediately splits into two molecules of 3-phosphoglycerate (3-PGA).
2. Reduction:
- ATP and NADPH, which are products of the light reactions occurring in the thylakoid membranes, provide the energy and reducing power for the reduction phase.
- Each molecule of 3-PGA is phosphorylated by ATP, converting it into 1,3-bisphosphoglycerate (1,3-BPGA).
- NADPH then donates high-energy electrons to 1,3-BPGA, converting it into glyceraldehyde-3-phosphate (G3P) and regenerating NADP+.
3. Regeneration:
- Some of the G3P molecules are used to synthesize glucose and other carbohydrates, while the remaining G3P molecules are used to regenerate RuBP.
- This regeneration is essential for the continuous functioning of the Calvin cycle, as RuBP is necessary for the carbon fixation step.
Conclusion:
The biosynthetic phase of photosynthesis, which occurs in the stroma of the chloroplast, requires the products of the light reactions like NADPH and ATP. These products provide the energy and reducing power necessary for the conversion of carbon dioxide into glucose during the Calvin cycle. Therefore, statement d) is incorrect.
Explanation:
The biosynthetic phase of photosynthesis, also known as the Calvin cycle or the dark reaction, occurs in the stroma of the chloroplast. It involves the conversion of carbon dioxide (CO2) into glucose using the energy obtained from the light reactions.
The Calvin cycle is a series of enzymatic reactions that can be divided into three main stages: carbon fixation, reduction, and regeneration.
1. Carbon Fixation:
- The enzyme RuBisCO (Ribulose-1,5-bisphosphate carboxylase/oxygenase) fixes carbon dioxide by combining it with RuBP (Ribulose-1,5-bisphosphate), a 5-carbon compound.
- This results in the formation of an unstable 6-carbon compound, which immediately splits into two molecules of 3-phosphoglycerate (3-PGA).
2. Reduction:
- ATP and NADPH, which are products of the light reactions occurring in the thylakoid membranes, provide the energy and reducing power for the reduction phase.
- Each molecule of 3-PGA is phosphorylated by ATP, converting it into 1,3-bisphosphoglycerate (1,3-BPGA).
- NADPH then donates high-energy electrons to 1,3-BPGA, converting it into glyceraldehyde-3-phosphate (G3P) and regenerating NADP+.
3. Regeneration:
- Some of the G3P molecules are used to synthesize glucose and other carbohydrates, while the remaining G3P molecules are used to regenerate RuBP.
- This regeneration is essential for the continuous functioning of the Calvin cycle, as RuBP is necessary for the carbon fixation step.
Conclusion:
The biosynthetic phase of photosynthesis, which occurs in the stroma of the chloroplast, requires the products of the light reactions like NADPH and ATP. These products provide the energy and reducing power necessary for the conversion of carbon dioxide into glucose during the Calvin cycle. Therefore, statement d) is incorrect.
Community Answer
Mark the incorrect statementa)Low PH present in lumen of thylakoid inv...
CO2 is not a product of light reaction
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Mark the incorrect statementa)Low PH present in lumen of thylakoid involve in ATP synthesisb)Breakdown of Gradient occur with the help of channel of proton whichrelease energyc)Biosynthetic phase occur in stroma of chloroplastd)biosynthetic phase require product of light reaction like NADPH, ATP and CO2Correct answer is option 'D'. Can you explain this answer?
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Mark the incorrect statementa)Low PH present in lumen of thylakoid involve in ATP synthesisb)Breakdown of Gradient occur with the help of channel of proton whichrelease energyc)Biosynthetic phase occur in stroma of chloroplastd)biosynthetic phase require product of light reaction like NADPH, ATP and CO2Correct answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Mark the incorrect statementa)Low PH present in lumen of thylakoid involve in ATP synthesisb)Breakdown of Gradient occur with the help of channel of proton whichrelease energyc)Biosynthetic phase occur in stroma of chloroplastd)biosynthetic phase require product of light reaction like NADPH, ATP and CO2Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Mark the incorrect statementa)Low PH present in lumen of thylakoid involve in ATP synthesisb)Breakdown of Gradient occur with the help of channel of proton whichrelease energyc)Biosynthetic phase occur in stroma of chloroplastd)biosynthetic phase require product of light reaction like NADPH, ATP and CO2Correct answer is option 'D'. Can you explain this answer?.
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