Glycolysis completes with the net gain of:
Correct answer: A. 2 ATP
- A. 2 ATP
- B. 3 ATP
- C. 4 ATP
- D. 32 ATP
Explanation
Glycolysis is the process of breaking down one molecule of glucose into two molecules of pyruvate. During this process, 4 ATP molecules are produced in total; however, 2 ATP molecules are consumed in the initial steps. Therefore, the net gain of ATP from glycolysis is 2 ATP. Option A is correct.Options B and C are incorrect as they do not account for the consumption of 2 ATP during the process. Option D is incorrect because it refers to the ATP yield from the complete oxidation of glucose during cellular respiration, including the Krebs cycle and oxidative phosphorylation, not just glycolysis.
This question appeared on the ETEA MDCAT 2012 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Cellular Respiration
Cellular respiration releases energy from glucose through glycolysis, the link reaction, the Krebs cycle and the electron transport chain, producing ATP. The pathway differs in oxygen availability: aerobic respiration uses oxygen and yields more ATP, while anaerobic respiration produces much less ATP and forms lactic acid in muscles or ethanol and carbon dioxide in yeast.
Practise Bioenergetics
1,378 free Bioenergetics MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Cellular Respiration questions
The process responsible for energy production in animals is:
Each molecule of NADH2 entering the electron transport chain produces:
What happens to oxygen in the electron transport chain?
The conversion of excess glucose into fat is known as:
The number of ATP formed directly by a single Krebs cycle is:
Redox action takes place during the process of: