Glycolysis

What is the first step of glycolysis?

• The conversion of glucose to pyruvate.

• The phosphorylation of glucose to glucose-6-phosphate.

• The oxidation of glucose-6-phosphate to fructose-6-phosphate.

• The cleavage of fructose-1,6-bisphosphate into two three-carbon molecules.

What are the reactants of cellular respiration?

• Glucose and oxygen.

• Carbon dioxide and water.

• Glucose and carbon dioxide.

• Oxygen and water.

What is glycolysis?

• The process of breaking down glucose to produce energy.

• A method of synthesizing glucose from non-carbohydrate sources.

• A type of fermentation that occurs in yeast.

• The process of converting glucose into fat for storage.

Where does glycolysis occur?

• In the mitochondria of the cell.

• In the cytoplasm of the cell.

• In the nucleus of the cell.

• In the endoplasmic reticulum of the cell.

What is the role of NAD+ in glycolysis?

• It acts as an electron carrier, becoming NADH.

• It is a substrate for ATP production.

• It inhibits the glycolytic pathway.

• It converts glucose into pyruvate.

What is substrate-level phosphorylation?

• A process of generating ATP by directly transferring a phosphate group to ADP.

• A method of ATP production that occurs in the mitochondria.

• A mechanism that involves the electron transport chain for ATP synthesis.

• A process that requires oxygen to produce ATP.

How many molecules of pyruvate are produced from one molecule of glucose during glycolysis?

• One molecule of pyruvate.

• Two molecules of pyruvate.

• Three molecules of pyruvate.

• Four molecules of pyruvate.

What happens to pyruvate after glycolysis in aerobic conditions?

• It is converted into lactate.

• It enters the mitochondria for further processing in the Krebs cycle.

• It is used to produce glucose.

• It is excreted from the cell.

What is the significance of glycolysis in cellular respiration?

• It is the first step in the breakdown of glucose for energy.

• It occurs in the mitochondria and produces ATP.

• It is the final step of aerobic respiration.

• It converts fatty acids into glucose.

What are the energy investment and payoff phases in glycolysis?

• The energy investment phase uses 1 ATP, while the payoff phase produces 5 ATP.

• The energy investment phase uses 2 ATP, while the payoff phase produces 4 ATP.

• The energy investment phase uses 3 ATP, while the payoff phase produces 2 ATP.

• The energy investment phase uses 2 ATP, while the payoff phase produces 2 ATP.