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What would be the consequence of a mutation that causes E. coli to produce 2 eth

ID: 47416 • Letter: W

Question

What would be the consequence of a mutation that causes E. coli to produce 2 ethanol molecules and no lactate during fermentation? How would this affect the cell?

Question 4 options:

Fermentation would now require 8 NADH. This is fine because NADH is easily recycled.

Fermentation would now require 4 NADH. This would be detrimental for the cell because glycolysis only produces 2NADH, which would deplete the pool of available NADH; potentially stalling fermentation.

Fermentation would require 6 NADH. This will cause the bacteria to lose have 4 leftover NADH at the end of the fermentation. This is fine because NADH can be oxidized to NAD+ in the nucleus during G2 phase.

Fermentation would now require 4 NADH. This would be beneficial for the cell because NADH can be generated through respiration

A)

Fermentation would now require 8 NADH. This is fine because NADH is easily recycled.

B)

Fermentation would now require 4 NADH. This would be detrimental for the cell because glycolysis only produces 2NADH, which would deplete the pool of available NADH; potentially stalling fermentation.

C)

Fermentation would require 6 NADH. This will cause the bacteria to lose have 4 leftover NADH at the end of the fermentation. This is fine because NADH can be oxidized to NAD+ in the nucleus during G2 phase.

D)

Fermentation would now require 4 NADH. This would be beneficial for the cell because NADH can be generated through respiration

Explanation / Answer

The correct option is (B)

Fermentation would now require 4 NADH. This would be detrimental for the cell because glycolysis only produces 2NADH, which would deplete the pool of available NADH; potentially stalling fermentation.

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