MCB 181R Lecture 8: Bio Chapter 8

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Photosynthesis is the major pathway by which energy and carbon are incorporated into carbohydrates. The calvin cycle is a three-step process that results the incorporation of carbon dioxide into carbohydrates. The light harvesting reactions use sunlight to produce atp and nadph required by the calvin cycle. A biochemical process for building carbohydrates from sunlight and carbon dioxide taken from the air. Oxidation of water with o2 produced as a by-product- reduction of co2 to form carbohydrates. Dark reactions take place in the stroma. Step 1: carboxylation, capturing co2 molecule and adding it to rubp molecule. Step 2: it will be reduced by nadph when it transfers high-energy electrons. Step 3: regeneration of rubp, 3-carbon compounds are reorganized and combined to produce rubp. Rubp is the most common protein on earth. Rubisco: a very slow enzyme; must be produced in very large amounts, sensitive to high.

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