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PGA as the first CO2 fixation product was discovered in photosynthesis of : [2010]
- a)Bryophyte
- b)Gymnosperm
- c)Angiosperm
- d)Alga
Correct answer is option 'D'. Can you explain this answer?
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PGA as the first CO2 fixation product was discovered in photosynthesis...
Phosphoglyceric and (PGA) is the first stable product of photosynthesis. It was first discovered by Calvin, Benson and their colleagues in Chlorella, algae.
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PGA as the first CO2 fixation product was discovered in photosynthesis...
Calvin, Benson and their colleagues in California, U.S.A. fed Chlorella and Scenedesmus with radioactive ,4C in carbon dioxide. Radioactive carbon, l4C has a half life of 5568 years. Therefore, the path of CO2 fixation can be easily traced with its help. Algal suspension illuminated and carrying out photo- synthesis with normal carbon dioxide was supplied l4CO2. The algae was killed at intervals in near boiling methanol. It immediately stopped photosynthesis activity due to denaturation of enzymes. Alcohol was evaporated and after crushing the alga, the product was made into paste. The paste was placed on paper chromatogram and the different compounds were separated by two dimensional chromatography. The radioactive compounds were identified by comparing their position on the chromatogram with standard chemicals. Calvin and co-workers found that after three seconds, radioactivity appeared in phosphoglyceric acid or PGA. Phosphoglyceric acid is, therefore, the first stable product of photosynthesis.
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PGA as the first CO2 fixation product was discovered in photosynthesis...
PGA as the First CO2 Fixation Product in Photosynthesis
PGA (phosphoglyceric acid) is the first stable product of CO2 fixation in the process of photosynthesis. It is a three-carbon compound that forms during the Calvin cycle, which is the light-independent reactions of photosynthesis.
Discovery in Algae
- PGA was first discovered as the initial product of CO2 fixation in photosynthesis in algae.
- Algae are simple, photosynthetic organisms that play a crucial role in the aquatic ecosystem.
- The discovery of PGA in algae helped scientists understand the mechanism of carbon fixation in photosynthetic organisms.
Importance of the Discovery
- Identifying PGA as the first CO2 fixation product in photosynthesis was a significant milestone in the study of plant physiology.
- This discovery laid the foundation for further research on the Calvin cycle and the overall process of photosynthesis.
- Understanding the role of PGA in carbon fixation is essential for improving crop productivity and addressing environmental challenges related to CO2 levels in the atmosphere.
Conclusion
- PGA as the first CO2 fixation product in photosynthesis was discovered in algae.
- This discovery has had a profound impact on our understanding of plant biology and photosynthetic processes.
- Further research continues to build upon this foundational knowledge to develop sustainable agricultural practices and mitigate the effects of climate change.
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PGA as the first CO2 fixation product was discovered in photosynthesis of : [2010]a)Bryophyteb)Gymnospermc)Angiospermd)AlgaCorrect answer is option 'D'. Can you explain this answer?
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