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 a chemical energy from organic fuel. The three stages are glycolysis, citric acid cycle, and electron transport.

• What is the role of glycolysis? Include the reactants and the products. Where does it occur? The role of glycolysis is splitting sugar into two parts. This allows the cells to make ATP. When the splitting of the two molecules of ATP happen they turn into two molecules of pyruvic acid and the two electrons carrying NADH are produce.

• 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 reduce and carry electrons that are high in energy to the next stage. In this stage, glycolysis is converted to acetyl CoA by creating many compounds that can store the high-energy electrons along the ATP molecules.

• What is the role of the electron transport system? Include the reactants and the products. Where does it occur?

The electron transport system transfers the electrons through electron carriers. The energy that is released by electrons pumps hydrogen ions across the inner membranes of the mitchondrin, thus creating high hydrogen ion concentration.

Photosynthesis:

• What is the overall goal of photosynthesis? The overall goal of photosynthesis is to convert light into energy.

• Because photosynthesis only occurs in plants, why is it essential to animal life? Photosynthesis is essential to animal because plants are a form of food, and the byproduct of photosynthesis is oxygen. Animals need to