What is a physical change?
2 answers:
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Answer:
- ATP and NADPH facilitate the reduction of 6 molecules of 3-PGA (formed in carbon fixation)to six molecules of the simple sugar glyceraldehyde 3-phosphate (G3P).
- In the reduction process ADP and NADPH+ are made, when ATP releases energy and loses its terminal phosphate, and NADPH loses energy and a hydrogen atom.
- ADP and NADPH+ return to the light-dependent reactions for re-use.
Explanation:
Sugar biosynthesis in plants, called photosynthesis produces glucose from the reactants; it uses energy from sunlight, along with carbon dioxide and water. In chloroplasts, this occurs in the light-dependent and dark reactions. In the light- dependent reaction, solar energy stimulates photosystems, formed from pigments like chlorophylls.
In the light-independent reaction, products of the light reaction are used to make sugars. Here, in the Calvin cycle, the enzyme, RuBisCO, catalyzes the fixation of CO2 with Ribulose 1,5-bisphosphate (RuBP). Organic molecules are reduced and RuBP is regenerated.
