Glycolysis and Citric Acid Cycle Quiz

Which enzyme is responsible for the phosphorylation of fructose 6-phosphate in glycolysis?

• Hexokinase

• Phosphofructokinase (PFK-1)

• Aldolase

• Enolase

What is the product formed when glucose is phosphorylated in the first step of glycolysis?

• Fructose 1,6-bisphosphate

• Glucose 6-phosphate

• Dihydroxyacetone phosphate

• Pyruvate

Which hormone stimulates PFK-2, leading to the conversion of a small amount of fructose 6-P to fructose 2,6-bisP?

• Glucagon

• Insulin

• Epinephrine

• Cortisol

In the citric acid cycle, what is the product formed when succinyl-CoA is converted?

• Citrate

• Succinate

• Malate

• Oxaloacetate

What is the role of ATP synthase in oxidative phosphorylation?

• It pumps protons into the intermembrane space.

• It synthesizes ATP from ADP and inorganic phosphate.

• It oxidizes NADH to NAD+.

• It transfers electrons to oxygen.

Which molecule acts as the final electron acceptor in the electron transport chain?

• FADH2

• Oxygen

• Carbon dioxide

• NADH

Tags

NGSS.HS-LS1-7

What is the main purpose of the citric acid cycle in cellular respiration?

• To oxidize acetyl-CoA to CO2 and capture high-energy electrons

• To convert pyruvate to lactate

• To produce glucose

• To generate ATP directly

Tags

NGSS.HS-LS1-7

Which enzyme catalyzes the conversion of pyruvate to acetyl-CoA?

• Malate dehydrogenase

• Lactate dehydrogenase

• Pyruvate dehydrogenase

• Pyruvate kinase

Tags

NGSS.HS-LS1-7

Which molecule is primarily responsible for carrying electrons from glycolysis to the electron transport chain?

• CO2

• FADH2

• NADH

• ATP

Tags

NGSS.HS-LS1-7

During glycolysis, which enzyme catalyzes the conversion of phosphoenolpyruvate to pyruvate?

• Hexokinase

• Aldolase

• Pyruvate kinase

• Phosphofructokinase