Understanding Glycolysis

What is the primary purpose of glycolysis?

• The primary purpose of glycolysis is to produce energy in the form of ATP.

• To break down glucose into fatty acids.

• To convert pyruvate into glucose.

• To synthesize proteins for cellular repair.

How many ATP molecules are produced in glycolysis?

• 1 ATP

• 4 ATP

• 3 ATP

• 2 ATP

What is the end product of glycolysis?

• lactate

• pyruvate

• glucose

• acetyl-CoA

Which molecule is the starting substrate for glycolysis?

• Glucose

• Fructose

• Acetyl-CoA

• Pyruvate

What are the two main phases of glycolysis?

• Energy investment phase and energy payoff phase

• Citric acid cycle and electron transport chain

• Anaerobic phase and aerobic phase

• Glycolytic phase and oxidative phase

How many NADH molecules are generated during glycolysis?

• 2 NADH

• 4 NADH

• 3 NADH

• 1 NADH

What is the role of hexokinase in glycolysis?

• Hexokinase phosphorylates glucose to glucose-6-phosphate in glycolysis.

• Hexokinase transports glucose into the mitochondria.

• Hexokinase breaks down glucose into smaller molecules.

• Hexokinase converts glucose to pyruvate in glycolysis.

Which enzyme converts glucose-6-phosphate to fructose-6-phosphate?

• Hexokinase

• Fructose-1,6-bisphosphatase

• Aldolase

• Phosphoglucose isomerase

What is the significance of the energy investment phase in glycolysis?

• It prepares glucose for breakdown by using ATP to phosphorylate it, making it more reactive.

• It directly produces ATP and NADH for cellular respiration.

• It breaks down fatty acids for energy production.

• It converts glucose into pyruvate without using any energy.

How does glycolysis occur in the absence of oxygen?

• Glycolysis occurs anaerobically by converting glucose to pyruvate, producing ATP and NADH, followed by fermentation to regenerate NAD+.

• Glycolysis requires oxygen to produce ATP and NADH.

• Glycolysis occurs only in aerobic conditions with high energy yield.

• Glycolysis converts pyruvate to glucose in the absence of oxygen.