What would happen to respiration if oxygen were to become limiting? The Kreb’s C

Question

What would happen to respiration if oxygen were to become limiting?

The Kreb’s Cycle is started and produces more ATP.

Glycolysis stops and only electron transport/oxidative phosphorylation occurs to keep things going.

Glycolysis produces small amounts of ATP for a short period of time in the absence of oxygen

Nothing. Respiration cannot occur without oxygen present

The Kreb’s Cycle is started and produces more ATP.

Glycolysis stops and only electron transport/oxidative phosphorylation occurs to keep things going.

Glycolysis produces small amounts of ATP for a short period of time in the absence of oxygen

Nothing. Respiration cannot occur without oxygen present

Explanation / Answer

Ans-d Nothing.Respiration cannot occur without oxygen.

Aerobic respiration requires oxygen because oxygen is the final electron acceptor of the electron transport chain in the mitochondria. If there is no oxygen to accept electrons, then the electron transport chain stops working and the high energy molecules NADH+H and FADH2 cannot be converted back into NAD and FAD. Without these molecules, the glucose biochemical pathway stops. These molecules become the limiting reagents needed for glucose break down to continue, and when they run out, the pathway stops.

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