NY Regents Life Science Biology Practice Questions - Regents Examination In Life Science Biology Exam

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A change in a DNA sequence causes one amino acid in a membrane receptor to be replaced. Which result would most directly show a structure-and-function relationship?

The cell divides more slowly because the receptor is a carbohydrate The receptor changes shape and no longer binds its signal molecule effectively The nucleus moves out of the cell because DNA is now outside the chromosome The organism immediately produces a new species with the changed receptor

Correct Answer:

The receptor changes shape and no longer binds its signal molecule effectively

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