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Cellular Respiration Process

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Questions and Answers

What is the byproduct of the breakdown of glucose in Glycolysis?

2 Pyruvate molecules (correct)

2 ATP

2 NADH

2 FADH2

What is the energy requirement to start the Glycolysis process?

1 ATP

2 ATP (correct)

3 ATP

4 ATP

What is the net gain of ATP in the Glycolysis process?

0 ATP

6 ATP

2 ATP (correct)

4 ATP

What is the byproduct of the Pyruvate oxidation in the Krebs cycle?

Citric acid Signup and view all the answers

What is the energy yield from each NADH in the Electron transport chain?

3 ATP Signup and view all the answers

What is the total ATP yield from the Electron transport chain?

34 ATP Signup and view all the answers

What is the characteristic of the Glycolysis process?

It is an anaerobic process Signup and view all the answers

What is the result of the combination of Coenzyme A and pyruvate in the Krebs cycle?

A 6-carbon molecule called citric acid Signup and view all the answers

What is the role of NAD+ and FAD in the Krebs cycle?

They pick up electrons from pyruvate Signup and view all the answers

How many ATP are produced in the Krebs cycle?

2 ATP Signup and view all the answers

What is the total ATP yield from the three processes of cellular respiration?

38 ATP Signup and view all the answers

What is the role of ATP synthase in the Electron transport chain?

It generates ATP from NADH and FADH2 Signup and view all the answers

What is the total number of NADH produced in the Krebs cycle?

3 NADH per pyruvate, for a total of 6 NADH Signup and view all the answers

Study Notes

Cellular Respiration

Cellular respiration is the process of converting glucose into ATP through three stages: Glycolysis, Krebs Cycle, and Electron Transport Chain.

Glycolysis

Breaks down glucose into 2 pyruvate molecules, each with 3 carbon atoms
Anaerobic process, meaning it does not require oxygen
Requires 2 ATP to initiate the process
Net gain of 2 ATP and 2 NADH molecules

Krebs Cycle

Aerobic process, meaning it requires oxygen
Pyruvate molecules are oxidized, releasing one carbon atom
Coenzyme A (2-carbon chain) combines with the remaining pyruvate to form citric acid (6-carbon molecule)
NAD+ and FAD pick up electrons from pyruvate, generating NADH and FADH2
1 pyruvate molecule yields 3 NADH and 1 FADH2 molecules
Total yield: 6 NADH and 2 FADH2 molecules

Electron Transport Chain

NADH and FADH2 from the Krebs cycle are used to generate ATP
ATP synthase produces ATP from the energy released by the electron transport chain
1 NADH molecule generates 3 ATP molecules
1 FADH2 molecule generates 2 ATP molecules
Total ATP yield: 34 ATP molecules

Total ATP Yield

Glycolysis: 2 ATP
Krebs Cycle: 2 ATP
Electron Transport Chain: 34 ATP
Total: 38 ATP molecules

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Description

This quiz covers the three stages of cellular respiration, including glycolysis, pyruvate oxidation, and the Krebs cycle. It explains the processes of breaking down glucose into ATP, the role of oxygen, and the resulting ATP and NADH.