by stanton.nayeli
Dive into the heart of cellular respiration with our Krebs Cycle Quiz! This essential metabolic pathway, also known as the citric acid cycle, plays a vital role in energy production within cells. Whether you’re a biology student or a science enthusiast, this quiz will test your knowledge on the intricate steps, enzymes, and intermediates that drive this process. Sharpen your understanding and see how well you know the Krebs Cycle!
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Krebs Cycle Quiz Questions Overview
1. What is the first molecule that enters the Krebs Cycle?
Acetyl-CoA
Pyruvate
Citrate
Succinate
2. Which enzyme catalyzes the conversion of citrate to isocitrate?
Aconitase
Citrate synthase
Isocitrate dehydrogenase
Fumarase
3. How many NADH molecules are produced per turn of the Krebs Cycle?
1
2
3
4
4. Which molecule is regenerated at the end of the Krebs Cycle?
Citrate
Oxaloacetate
Succinate
Fumarate
5. What is the main purpose of the Krebs Cycle?
To produce ATP directly
To generate electron carriers for the electron transport chain
To break down glucose
To synthesize fatty acids
6. Which of the following is not an intermediate of the Krebs Cycle?
Citrate
Alpha-ketoglutarate
Malate
Pyruvate
7. How many ATP (or GTP) molecules are produced per turn of the Krebs Cycle?
1
2
3
4
8. Which enzyme catalyzes the conversion of succinate to fumarate?
Succinate dehydrogenase
Fumarase
Malate dehydrogenase
Citrate synthase
9. Which molecule is directly produced from the decarboxylation of alpha-ketoglutarate?
Citrate
Succinyl-CoA
Malate
Oxaloacetate
10. Which coenzyme is required for the conversion of succinyl-CoA to succinate?
NAD+
FAD
CoA
GDP
11. Which of the following is a product of the Krebs Cycle?
Lactate
NADH
Glucose
Fructose
12. Which enzyme catalyzes the final step of the Krebs Cycle?
Malate dehydrogenase
Fumarase
Aconitase
Citrate synthase
13. How many carbon dioxide molecules are produced per turn of the Krebs Cycle?
1
2
3
4
14. Which of the following is not a function of the Krebs Cycle?
Production of NADH and FADH2
Generation of ATP (or GTP)
Synthesis of glucose
Production of carbon dioxide
We recommend that you do not leave the page that you are taking this quiz in. Stay honest 🙂
