Photosynthesis and cellular respiration Essay

Document Type:Essay

Subject Area:Biology

Document 1

During glycolysis glucose is broken down into two pyruvate molecules and four ATP molecules. In the second stage (pyruvate oxidation), every pyruvate molecule is converted into two acetyl CoA molecules carbon dioxide and two hydrogen atoms. During the third stage (citric acid cycle), coenzyme A joins oxygen molecules to produce two ATP molecules carbon dioxide and six hydrogen molecules. In the fourth stage (oxidative phosphorylation), 32 ATP molecules are released by the flow of protons into the matrix via ATP synthase. Water is also released during this process. In the second stage (light-independent reactions) or dark stage the enzyme RuBisco uses carbon dioxide in the environment and the NADPH from the light stage to release three-carbon sugars and water. Photosynthesis is an important process since it releases atmospheric oxygen responsible for supporting life.

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