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Glycolysis Pathway questions

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1) Glycerol can enter the glycolysis pathway by being converted to what?

2) How many molecules of ATP are used up in the glycolysis pathway?

3) How many pyruvate molecules are obtained from one molecule of glucose in the glycolysis pathway?

4) How many molecules of ATP are produced in the glycolysis pathway?

5) How many molecules of NADH are produced in glycolysis (before the Krebs Cycle)?

6) What is the total number of molecules of ATP that are produced as a result of the glycolysis and the Krebs Cycle?

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1) If the cell is operating under aerobic conditions (presence of oxygen), then NADH must be reoxidized to NAD+ by the electron transport chain. This presents a problem since glycolysis occurs in the cytoplasm while the respiratory chain is in the mitochondria which has membrane that is not permeable to NADH. This problem is solved by using glycerol phosphate as a "shuttle." The hydrogens and electrons are transferred from NADH to glycerol phosphate which can diffuse through the ...

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This solution answers several questions about the glycolysis pathway.

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Cellular Respiration and Photosynthesis

Photosynthesis uses light energy to convert carbon dioxide into glucose, a simple sugar, in two steps, the light dependent and light independent reactions. Oxygen is produced as a by product during photosynthesis. This reaction stores energy in the chemical bonds of glucose.

Sugar and other carbohydrates are used as fuel sources by cells. During the process of Aerobic Cellular Respiration, glucose is broken down using oxygen. This reaction releases energy which is used to create ATP molecules, the energy carrier molecule of cells. The process also releases Carbon Dioxide as a byproduct.

Part 1: Download and fill out this table to compare and contrast Photosynthesis and Aerobic Cellular Respiration. You will submit the completed table for Part 1.

Click here for a copy of the table.


Aerobic Cellular Respiration

Full balanced equation



Is this reaction endergonic or exergonic? State which one it is.

Energy source used

Cell organelles involved in the reaction

Role of ATP in the reaction

Part 2: After completing the table you will have a basic understanding of these two complementary metabolic processes. Using what you have learned, and additional reference information, answer the following questions.

1. What is the name given to the types of organisms that can use photosynthesis to produce glucose? In addition, provide THREE specific examples.
2. Would cyanide affect bacteria that use anaerobic respiration? To answer this you will need to consider the role of oxygen in aerobic cellular respiration. Explain your answer.
3. If oxygen is lacking, how might cells meet their energy needs through fermentation? Explain and give some examples of cells that can do this.
4. Both photosynthesis and aerobic cellular respiration are examples of complex metabolic pathways, consisting of many linked chemical reactions that require enzymes to function. Briefly, explain two (ONLY TWO) attributes of enzymes in catalyzing chemical reactions and in metabolic pathways.

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