Carbon dioxide is first released during aerobic respiration in the
Correct answer: B. oxidative decarboxylation of pyruvate
- A. glycolysis of glucose
- B. oxidative decarboxylation of pyruvate
- C. electron transport chain
- D. phosphorylation of ADP
Explanation
Glycolysis only splits glucose into pyruvate without releasing any CO2; the first decarboxylation happens when pyruvate is converted to acetyl CoA. The Krebs cycle then releases the remaining four CO2 molecules per glucose.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
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
In respiration, the coenzymes NAD and FAD function as carriers of
The hydrolysis of the terminal phosphate bond of one molecule of ATP to give ADP releases approximately
One molecule of ATP is composed of
Which stage of aerobic respiration produces the largest number of ATP molecules per glucose?
The reactions of the Krebs cycle take place in the
The anaerobic respiration of yeast is economically useful because the carbon dioxide it releases