Electron Transfer in Respiration Quiz

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What is the primary role of the electron transport chain in cellular respiration?

To generate ATP through the process of oxidative phosphorylation (correct)
To break down glucose into pyruvate
To transfer electrons from NADH to oxygen
To catalyze the steps of the citric acid cycle

What is the role of the citric acid cycle in cellular respiration?

To generate NADH and FADH2 for the electron transport chain (correct)
To break down glucose into carbon dioxide and water
To produce ATP directly
To convert pyruvate into acetyl-CoA

What is the purpose of the oxidation of pyruvate to acetyl-CoA in cellular respiration?

To generate ATP directly
To convert glucose into pyruvate
To break down glucose into carbon dioxide and water
To produce NADH and FADH2 for the electron transport chain (correct)

What is the purpose of ATP production in cellular respiration?

To provide energy for the cell's metabolic processes (D) Signup and view all the answers

How does the oxidation of glucose contribute to the overall process of cellular respiration?

By generating NADH and FADH2 for the electron transport chain (C) Signup and view all the answers

What is the role of the barrier of activation energy in the oxidation of glucose during cellular respiration?

To prevent the instantaneous combustion of glucose with oxygen (A) Signup and view all the answers

What is the fate of the carboxyl group during the oxidation of pyruvate to acetyl CoA?

It is removed as a molecule of CO2 (A) Signup and view all the answers

Where does the oxidation of glucose get completed in eukaryotic cells if molecular oxygen is present?

Mitochondrion (A) Signup and view all the answers

Which complex catalyzes the reactions linking glycolysis and the citric acid cycle by converting pyruvate to acetyl CoA?

Pyruvate dehydrogenase complex (A) Signup and view all the answers

What happens to most of the chemical energy in glucose after glycolysis releases less than a quarter of it?

Utilized for ATP production (B) Signup and view all the answers

Where does the oxidation of pyruvate to acetyl CoA take place in prokaryotic cells?

Cytosol (A) Signup and view all the answers

Which molecule feeds its acetyl group into the citric acid cycle for further oxidation?

Acetyl CoA (B) Signup and view all the answers

What is the main purpose of the electron transport chain in cellular respiration?

To transfer electrons to oxygen in energy-releasing steps (B) Signup and view all the answers

During which stage of aerobic respiration does the oxidation of glucose to CO2 occur?

Citric acid cycle (D) Signup and view all the answers

What happens to electrons as they are transferred from glucose to oxygen during cellular respiration?

They lose potential energy (D) Signup and view all the answers

Which process directly results in the formation of ATP molecules in cellular respiration?

Oxidative phosphorylation (B) Signup and view all the answers

What is the role of NADH in cellular respiration?

To transport electrons to the electron transport chain (B) Signup and view all the answers

Which molecule serves as an intermediate between glycolysis and the citric acid cycle in cellular respiration?

Acetyl CoA (A) Signup and view all the answers