In anaerobic respiration, only _ % of the energy present within the chemical bond of glucose is converted into ATP.
Correct answer: B. 2%
- A. 5%
- B. 2%
- C. 7%
- D. 10%
Explanation
In anaerobic respiration, the process primarily involves glycolysis followed by fermentation, which yields only a small amount of ATP compared to aerobic respiration. Specifically, about 2% of the energy in glucose is transformed into usable ATP, while the rest is lost as heat. This is significantly lower than aerobic respiration, which can convert around 30-32% of the energy in glucose. The incorrect options (5%, 7%, and 10%) overestimate the efficiency of anaerobic pathways, which are limited by the lack of oxygen and the nature of the fermentation processes involved.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Bioenergetics
Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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.