Q) Describe the significance of NADP during photosynthesis
Main points | |
Key idea: | What is nicotinamide adenine dinucleotide phosphate (NADP) |
· Co-enzyme + electron acceptor · Oxidized NADP can be reduced to NADPH, temporarily stores energized e + H+ (produced during light dep rx of photosyn) | |
Key idea: | Role of NADPH during light indep rx |
· Reduce glycerate-3-phosphate, to form triose phosphate / glyceraldehyde-3-phosphate (G3P) · Some triose phosphates combine to form glucose phosphates, eventually produce starch, fats & proteins · Rest of triose phosphates regenerate ribulose bisphosphate (RuBP) for carbon fixation | |
Key idea: | Regeneration of NADP+ for light dep rx |
· By donating its H to glycerate-3-phosphate, NADP+ is regenerated · Continue to accept e + H+ fr light dep rx · Coenz continues to contribute to light indep rx for syn of diff bio-molecules (e.g. starch) | |
Comments: (i) Visualize the answer with the aid of a labelled diagram. (ii) Verbalize the answer + write down the main points w/o referring to the answer (use abbreviations) (iii) Read again within the next 24h & once more within 72h (do not spend more than 10min) (iv) Glycerate-3-phosphate is also phosphoglycerate (PGA). | |
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