Glycolysis MCQ: Definition, Steps, Significance and Regulation

Glycolysis is a central metabolic pathway that is essential for the production of energy in living organisms. It is a series of enzymatic reactions that convert glucose into pyruvate, releasing energy in the process. This post is providing 25 glycolysis mcq to check your understanding skills. Glycolysis plays a critical role in the metabolism of all cells, as it is a key step in the production of ATP, the main energy currency of the cell.

Multiple-choice questions (MCQs) are a great way to test your knowledge and understanding of a particular subject. These types of questions are widely used in exams, quizzes, and other assessment tools. The MCQs on glycolysis are designed to test your understanding of the key concepts and enzymes involved in the process. Whether you are a student, researcher, or simply someone interested in the topic, these Glycolysis MCQs will provide you with an engaging and informative way to learn about glycolysis.

In this blog post, we will be providing a set of 25 multiple-choice questions (MCQs) on the topic of glycolysis. The questions cover a wide range of topics, including the preparatory phase, the payoff phase, enzymes, reactions, and the role of cofactors.

Each question will be accompanied by a set of answer choices, and the correct answer will be provided. These questions are designed to help you test your understanding of the key concepts and processes involved in glycolysis and will be particularly useful for students who are studying biochemistry or cell biology.

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#1. What is the first step in the preparatory phase of glycolysis?

Conversion of glucose-6-phosphate to fructose-6-phosphate

Conversion of glucose-6-phosphate to fructose-6-phosphate

Conversion of glucose to glucose-6-phosphate

Conversion of glucose to glucose-6-phosphate

Conversion of pyruvate to phosphoenolpyruvate

Conversion of pyruvate to phosphoenolpyruvate

Conversion of 1,3-bisphosphoglycerate to 3-phosphoglycerate

Conversion of 1,3-bisphosphoglycerate to 3-phosphoglycerate

#2. What is the final product of the preparatory phase of glycolysis?

Fructose-6-phosphate

Fructose-6-phosphate

Pyruvate

Pyruvate

3-Phosphoglycerate

3-Phosphoglycerate

Glucose-6-phosphate

Glucose-6-phosphate

#3. What is the final product of the payoff phase of glycolysis?

Glucose-6-phosphate

Glucose-6-phosphate

Pyruvate

Pyruvate

3-Phosphoglycerate

3-Phosphoglycerate

Fructose-6-phosphate

Fructose-6-phosphate

#4. How many ATP molecules are produced in the payoff phase of glycolysis?

0

0

1

1

2

2

4

4

#5. How many NADH molecules are produced in the payoff phase of glycolysis?

0

0

1

1

2

2

3

3

#6. In which organelle does glycolysis occur?

Mitochondria

Mitochondria

Ribosomes

Ribosomes

Endoplasmic reticulum

Endoplasmic reticulum

Cytosol

Cytosol

#7. How many carbons are in each molecule of glucose?

2

2

3

3

4

4

6

6

#8. Which enzyme converts glucose to glucose-6-phosphate?

Phosphoglycerate kinase

Phosphoglycerate kinase

Hexokinase

Hexokinase

Pyruvate kinase

Pyruvate kinase

Enolase

Enolase

#9. Which enzyme converts glyceraldehyde 3-phosphate to 1,3-bisphosphoglycerate?

Phosphoglycerate kinase

Phosphoglycerate kinase

Hexokinase

Hexokinase

Glyceraldehyde 3-phosphate dehydrogenase

Glyceraldehyde 3-phosphate dehydrogenase

Enolase

Enolase

#10. What is the function of the enzyme hexokinase?

Converts glucose-6-phosphate to fructose-6-phosphate

Converts glucose-6-phosphate to fructose-6-phosphate

Converts fructose-6-phosphate to 2 triose phosphates

Converts fructose-6-phosphate to 2 triose phosphates

Converts 1,3-bisphosphoglycerate to 3-phosphoglycerate

Converts 1,3-bisphosphoglycerate to 3-phosphoglycerate

Converts glucose to glucose-6-phosphate

Converts glucose to glucose-6-phosphate

#11. What is the function of the enzyme phosphohexose isomerase?

Converts 1,3-bisphosphoglycerate to 3-phosphoglycerate

Converts 1,3-bisphosphoglycerate to 3-phosphoglycerate

Converts glucose to glucose-6-phosphate

Converts glucose to glucose-6-phosphate

Converts glucose-6-phosphate to fructose-6-phosphate

Converts glucose-6-phosphate to fructose-6-phosphate

Converts glyceraldehyde 3-phate to 1,3-bisphosphoglycerate

Converts glyceraldehyde 3-phate to 1,3-bisphosphoglycerate

#12. What is the function of the enzyme aldolase?

Converts 2-phosphoglycerate to phosphoenolpyruvate

Converts 2-phosphoglycerate to phosphoenolpyruvate

Converts glyceraldehyde 3-phosphate to 1,3-bisphosphoglycerate

Converts glyceraldehyde 3-phosphate to 1,3-bisphosphoglycerate

Converts fructose-6-phosphate to 2 triose phosphates

Converts fructose-6-phosphate to 2 triose phosphates

Converts 3-phosphoglycerate to 2-phosphoglycerate

Converts 3-phosphoglycerate to 2-phosphoglycerate

#13. What is the function of the enzyme triose phosphate isomerase?

Converts glyceraldehyde 3-phosphate to 1,3-bisphosphoglycerate

Converts glyceraldehyde 3-phosphate to 1,3-bisphosphoglycerate

Converts 2-phosphoglycerate to phosphoenolpyruvate

Converts 2-phosphoglycerate to phosphoenolpyruvate

Converts triose phosphates into their isomers

Converts triose phosphates into their isomers

Converts glucose to glucose-6-phosphate

Converts glucose to glucose-6-phosphate

#14. What is the function of the enzyme phosphoglycerate kinase?

Converts glucose to glucose-6-phosphate

Converts glucose to glucose-6-phosphate

Converts 3-phosphoglycerate to 2-phosphoglycerate

Converts 3-phosphoglycerate to 2-phosphoglycerate

Converts 1,3-bisphosphoglycerate to 3-phosphoglycerate

Converts 1,3-bisphosphoglycerate to 3-phosphoglycerate

Converts phosphoenolpyruvate to pyruvate

Converts phosphoenolpyruvate to pyruvate

#15. What is the function of the enzyme phosphoglycerate mutase?

Converts 2-phosphoglycerate to phosphoenolpyruvate

Converts 2-phosphoglycerate to phosphoenolpyruvate

Converts 3-phosphoglycerate to 2-phosphoglycerate

Converts 3-phosphoglycerate to 2-phosphoglycerate

Converts 1,3-bisphosphoglycerate to 3-phosphoglycerate

Converts 1,3-bisphosphoglycerate to 3-phosphoglycerate

Converts fructose-6-phosphate to 2 triose phosphates

Converts fructose-6-phosphate to 2 triose phosphates

#16. What is the function of the enzyme enolase?

Converts triose phosphates into their isomers

Converts triose phosphates into their isomers

Converts 2-phosphoglycerate to phosphoenolpyruvate

Converts 2-phosphoglycerate to phosphoenolpyruvate

Converts 1,3-bisphosphoglycerate to 3-phosphoglycerate

Converts 1,3-bisphosphoglycerate to 3-phosphoglycerate

Converts pyruvate to acetyl CoA

Converts pyruvate to acetyl CoA

#17. What is the function of the enzyme pyruvate kinase?

Converts glucose to glucose-6-phosphate

Converts glucose to glucose-6-phosphate

Converts 3-phosphoglycerate to 2-phosphoglycerate

Converts 3-phosphoglycerate to 2-phosphoglycerate

Converts phosphoenolpyruvate to pyruvate

Converts phosphoenolpyruvate to pyruvate

Converts glyceraldehyde 3-phosphate to 1,3-bisphosphoglycerate

Converts glyceraldehyde 3-phosphate to 1,3-bisphosphoglycerate

#18. What is the role of NAD+ in glycolysis?

Acts as a substrate for the enzyme hexokinase

Acts as a substrate for the enzyme hexokinase

Acts as a cofactor for the enzyme enolase

Acts as a cofactor for the enzyme enolase

Accepts electrons from glyceraldehyde 3-phosphate to form NADH

Accepts electrons from glyceraldehyde 3-phosphate to form NADH

Donates electrons to the electron transport chain

Donates electrons to the electron transport chain

#19. How many carbon molecules are in each molecule of pyruvate?

2

2

3

3

4

4

5

5

#20. How many ATP molecules are consumed in the preparatory phase of glycolysis?

0

0

1

1

2

2

4

4

#21. How many ATP molecules are consumed overall in the glycolysis process?

0

0

1

1

2

2

4

4

#22. In what conditions is the pyruvate converted into lactate instead of entering the citric acid cycle?

Lack of oxygen

Lack of oxygen

High levels of NADH

High levels of NADH

Low levels of glucose

Low levels of glucose

All of the above

All of the above

#23. What is the process of conversion of pyruvate to lactate called ?

Lactate fermentation

Lactate fermentation

alcoholic fermentation

alcoholic fermentation

Aerobic respiration

Aerobic respiration

Oxidative phosphorylation

Oxidative phosphorylation

#24. What happens to pyruvate when oxygen is present ?

converted to lactate

converted to lactate

converted to acetyl-CoA

converted to acetyl-CoA

converted to glucose

converted to glucose

converted to water

converted to water

#25. How many CO2 molecules are produced during one complete round of glycolysis?

0

0

1

1

2

2

4

4

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In conclusion, glycolysis is an essential metabolic pathway that is critical for the production of energy in all living organisms. The MCQs provided in this blog post have been designed to test your understanding of the key concepts and enzymes involved in the process of glycolysis. These questions cover a wide range of topics and will help you to assess your knowledge of the preparatory phase, the payoff phase, enzymes, reactions, and the role of cofactors.

Whether you are a student, researcher or simply someone interested in the topic, these MCQs will provide you with an engaging and informative way to learn about glycolysis. While studying these MCQs, you will learn about the different steps involved in glycolysis, the enzymes that catalyze these reactions, and the role of cofactors like NAD⁺ and ADP in the process. This knowledge will help you to develop a deeper understanding of the metabolism of cells and the importance of glycolysis in the production of energy.

We hope that you have found this blog post to be informative and engaging. We encourage you to take these MCQs and test your understanding of the topic. and in case you have any doubts or difficulties, you can always refer to the related textbook or consult with experts.