In what stage of cellular respiration is most of the carbon dioxide produced?

1 Answer
Maxwell · Mandira P.
May 13, 2017

The Krebs Cycle

Explanation:

The Krebs cycle ** or the TCA cycle** produces #"2 "CO_2# for every #"1 molecule of acetyl CoA".#

This occurs in Step 3 and Step 4 of the Krebs cycle.

In Step 3, #color(orange)"isocitrate"# is oxidized to become #color(blue)"alpha-ketoglutarate"# by the rate-limiting enzyme, #color(red)"isocitrate dehydrogenase".#

In Step 4, #color(blue)"alpha-ketoglutarate"# undergoes a redox reaction, oxidizing to become #color(magenta)"succinyl-CoA"#, also releasing #CO_2# in the process.

Each step generates the coenzyme, #"NADH"#, an electron carrier which is going to be important in the next stage of cellular respiration, the electron transport chain.

Related questions
See all questions in Role of ATP
Impact of this question
26926 views around the world
You can reuse this answer
Creative Commons License