Krebs Cycle Worksheet
A Grade 12 Biology worksheet focused on the Krebs Cycle, its stages, inputs, outputs, and significance in cellular respiration.
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Krebs Cycle Worksheet
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Date:
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Read each question carefully and answer to the best of your ability. Refer to your notes and textbook if needed.
1. The Krebs cycle primarily takes place in which part of the eukaryotic cell?
Cytoplasm
Mitochondrial matrix
Outer mitochondrial membrane
Inner mitochondrial membrane
2. What molecule enters the Krebs cycle after glycolysis and pyruvate oxidation?
Glucose
Pyruvate
Acetyl-CoA
ATP
3. For each molecule of Acetyl-CoA that enters the Krebs cycle, molecules of CO2 are released.
4. The primary role of the Krebs cycle is to produce electron carriers, namely and , which proceed to the electron transport chain.
5. The Krebs cycle is an anaerobic process, meaning it does not require oxygen.
True
False
6. The Krebs cycle directly produces a large amount of ATP.
True
False
7. Briefly describe the main purpose of the Krebs cycle in cellular respiration.
8. List the key products generated by one turn of the Krebs cycle.
Match each term on the left with its correct description on the right.
9. Citrate
a. Final electron acceptor in ETC
10. Oxaloacetate
b. Six-carbon molecule formed at the start of the Krebs cycle
11. FADH2
c. Four-carbon molecule that regenerates in the Krebs cycle
12. Oxygen
d. Electron carrier molecule
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