The bacterium Bacillus quizzical grows on glucose at the same rate whether O 2 i

Question

The bacterium Bacillus quizzical grows on glucose at the same rate whether O2 is present or not. But when O2 is available, the bacterium uses up much less glucose per unit time.

When O2 is present. B. quizzical probably uses _________ to derive energy from glucose. I thought it was oxidative phosphorylation but it was wrong.

glycolysis

TCA cycle (aka Krebs cycle, citric acid cycle)

electron transport

oxidative phosphorylation

all of these

The bacterium Bacillus quizzical grows on glucose at the same rate whether O2 is present or not. But when O2 is available, the bacterium uses up much less glucose per unit time.

When O2 is present. B. quizzical probably uses _________ to derive energy from glucose. I thought it was oxidative phosphorylation but it was wrong.

Explanation / Answer

In the presence of oxygen bacillus quizzical uses electron transport to derive energy because in the presence of oxygen all the reductant (NADH , FADH) oxidised to fulfill the energy demand very fast, whereas to derive energy from glycolysis or kreb's cycle it becomes quite slow.

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