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  • November 2012
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Associate Program Material

Cell Energy Worksheet

Answer the following questions:

Cellular respiration:

What is cellular respiration and what are its three stages?
Cellular respiration is the aerobic harvesting of chemical energy from organic fuel molecules. The three stages are cellular respiration are glycolysis, the citric acid cycle, and the electron transport system.

What is the role of glycolysis? Include the reactants and the products. Where does it occur? The role of glycolysis is to convert glucose into two pyruvate and then moves into the citric acid cycle. It occurs in the cytoplasm. The reactants are 2 ATP, and glucose. The products are 2 ATP 2 pyruvates and 2 NADH molecules.

What is the role of the citric acid cycle? Include the reactants and the products. Where does it occur?

The role of the citric acid cycle is to complete the breakdown of glucose all the way into CO2 and it occurs in the mitochondria. The reactants are pyruvic acid and glycolsis. The products are FADH2, (2)CO2, (3)NADH, GTP, and ATP.

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 transport the electrons captured from food by the NADH formed in the first two stages to oxygen and it occurs in the mitochondria. The reactants are (3) ATP, H2O. The products are oxygen. Photosynthesis:

What is the overall goal of photosynthesis?

The overall goal of photosynthesis is to produce energy from sunlight.

Because photosynthesis only occurs in plants, why is it essential to animal life? The photosynthesis is essential to animal life because it is primarily about providing them with food.

What is the role of the light reactions? Include the reactants and the products. Where does it occur?

The role of the light reactions are to generate the molecules NADPH and ATP from sunlight to drive the light-independent...

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