Why does the lack of oxygen stop the Krebs cycle in aerobic respiration?
May.04, 2010 in
Aerobic Respiration
Why does the lack of oxygen stop the Krebs cycle in aerobic respirat?on.
a.The krebs cycle needs oxygen as an electron acceptor
b. the electron transport chain shuts down so no NAD+ can be generated
May 4th, 2010 at 1:28 am
Well I mean, you could just say, “Because it’s aerobic respiration.” Ha. But it’s B. NAD+ is the electron acceptor in TCA Cycle (Krebs) and without oxygen, the CO2 cannot be formed to take away the Carbons.
May 4th, 2010 at 1:40 am
The wording of this question is trying to mislead you. The lack of oxygen does indeed halt the kreb cycle but not directly.
The lack of the terminal electron acceptor (oxygen) in the electron transport chain leads to the inability for NADH to be deprotonated to NAD+. The eventual lack of NAD+ ceases the Krebs Cycle.