Photosynthesis160-page15

Photosynthesis160-page15 - Two of the 12 molecules of G3P...

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Photosynthesis - 15 2. Reduction 2 PGA (Phosphoglyceric Acid) ± 2 G3P* (Glyceraldehyde 3 Phosphate) (2 ATP + 2 NADPH) ± (2 P i + 2 ADP + 2 NADP + ) A balanced CO 2 Fixation and Reduction uses: 6CO 2 + 6 RuBP + 12 ATP + 12 NADPH to produce 12 G3P. * G3P has 1 more H atom in its structure than PGA. The H was donated by NADPH during the reduction step. This forms an aldehyde molecule, rather than an organic acid. G3P is also called PGAL for Phosphoglyceraldehyde. 3. The Surplus or Output Phase - Producing Glucose Two of the 12 molecules of G3P are converted into one Glucose molecule.
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Unformatted text preview: Two of the 12 molecules of G3P are converted into one Glucose molecule. 2 ± ± ± ± Note: Glucose-6-phosphate often diverts to other carbohydrate synthesis pathways, notably the synthesis of starch, cellulose and sucrose. Little glucose accumulates in plants. G3P can also be converted to starch in the chloroplasts for short-term storage prior to translocation of carbohydrate to permanent storage parts of plants. Sucrose is the carbohydrate most commonly translocated....
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