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Cell Energy Worksheet

Answer the following questions:

Cellular respiration:

What is cellular respiration and what are its three stages? 1) Glycolysis: the cytoplasm 2) Krebs Cycle/The Citric Acid Cycle: mitochondria 3) Electron Transport Chain: the mitochondria

What is the role of glycolysis? Include the reactants and the products. Where does it occur? Glycolysis splits the glucose molecule into two pyruvic acid molecules. The Reactants going into the process are Glucose, NAD+ (and ATP to start the reaction). The products are 2 pyruvic acid molecules NADH and a net gain of 2 ATP (2 used 4 produced). This reaction occurs in the cytoplasm and is also considered the first step in both aerobic and anaerobic respiration.

What is the role of the citric acid cycle? Include the reactants and the products. Where does it occur? Each of the pyruvic acid molecules will be processed in two separate citric acid cycles. Here the three carbon pyruvic acid molecule is processed to produce ATP and Carbon Dioxide molecules. This Cycle uses ATP to specifically break down the pyruvate into Acetyl Co-A. Once this goes through the cycle, limited ATP as well as more NADH are produced. This happens in the mitochondria when sufficient oxygen is present to form the Carbon Dioxide.

What is the role of the electron transport system? Include the reactants and the products. Where does it occur? The role of the electron transport system is to complete the final oxidation of process of Acetyl Co-A that was started in the citric acid cycle. In this step, the products are water and ATP. These products are produced through processing the NADH product from the citric acid cycle as the reactants of the electron transport chain. This process occurs in the mitochondria.

Photosynthesis:

What is the overall

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