Krebs Cycle Worksheet
A Grade 9 science worksheet focusing on the Krebs Cycle, its stages, inputs, outputs, and importance in cellular respiration.
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Krebs Cycle Worksheet
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Read each question carefully and answer to the best of your ability. Refer to your notes or textbook if needed.
1. The Krebs Cycle, also known as the Citric Acid Cycle, occurs in which part of the cell?
Cytoplasm
Mitochondrial matrix
Nucleus
Cell membrane
2. What molecule enters the Krebs Cycle after glycolysis and pyruvate oxidation?
Glucose
Pyruvate
Acetyl-CoA
ATP
3. The Krebs Cycle is a series of chemical reactions used by all aerobic organisms to generate energy through the oxidation of into carbon dioxide.
4. For each molecule of Acetyl-CoA that enters the Krebs Cycle, molecules of ATP (or GTP), molecules of NADH, and molecules of FADH2 are produced.
5. Briefly explain the main purpose of the Krebs Cycle in cellular respiration.
6. Oxygen is directly consumed during the reactions of the Krebs Cycle.
True
False
7. Refer to the diagram of Cellular Respiration below. Identify where the Krebs Cycle fits into the overall process.
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