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Cellular and Molecular Biology

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Enzymes: Feedback Inhibition

CELLS-K@VB22

A cell expressing a feedback inhibition pathway that controls the levels of sugar hydrolysis is studied in a lab. Cells are placed in a sugar solution that can then be stained to detect sugar levels.

The normal cells in the solution show a level of sugars equivalent to a unit of 10.

A compound is added to a second sugar solution with the cells. This compound binds covalently to the allosteric site of an enzyme involved in the pathway and now the level of sugars are equivalent to a unit of 0.1.

Which of the options below BEST explain what happened in this experiment?

A

The enzyme with the allosteric site is responsible for the sugar hydrolase activity.

B

The compound in the second solution is deactivating the sugar hydrolases.

C

The compound in the second solution is degrading the sugars in the solution.