In what stage of aerobic respiration is carbon dioxide produced?
Correct answer: C. Krebs cycle.
- A. Glycolysis.
- B. ETC.
- C. Krebs cycle.
- D. Calvin cycle.
Explanation
Krebs cycle (or citric acid cycle) breaks down the pyruvic acid to carbon dioxide. This produces 2 ATP and 6 NADH for every glucose molecule entering glycolysis. The Krebs cycle takes place in the matrix of the mitochondria. The Krebs cycle produces the CO2 that you breathe out.Glycolysis is the initial stage of glucose metabolism that occurs in the cytoplasm of the cell, and does not produce carbon dioxide.ETC (Electron Transport Chain) is the final stage of aerobic respiration that occurs in the mitochondria, and does not directly produce carbon dioxide.Calvin cycle is a series of biochemical reactions that occur in the chloroplasts of plants during photosynthesis, and is not directly related to the production of carbon dioxide in aerobic respiration
This question appeared on the UHS MDCAT 2008 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
One of the most important molecule found in living organisms is ATP. What is its major function?
In Anaerobic respiration, only _ % of the energy present within the chemical bond of glucose is converted into ATP.
Respiration involves the
Which form of anaerobic respiration occurs in muscle cell of humans and other animals during extreme physical activities?
The molecule formed after first phosphorylation during glycolysis is:
What happens to oxygen in the electron trasfer chain in respiration?