In Bacteria,a Particular Gene Codes for a Protein That Helps

question 13

Multiple Choice

In bacteria,a particular gene codes for a protein that helps the bacteria break down and use lactose as a food source.If no lactose is present,

• A)the gene will be broken down so no enzyme is made.
• B)the gene will mutate to produce another,more useful,enzyme.
• C)the promoter for this gene will be blocked so RNA polymerase can't bind.
• D)the promoter for this gene will be enhanced so RNA polymerase binds more readily.

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Definitions:

Bacteria

Microorganisms that are often single-celled, which can be found in various environments, and can have beneficial or harmful effects on other organisms.

Protobionts

Hypothetical precursors to living cells, consisting of self-organized spheres of organic molecules, instrumental in the origin of life.

Heterotrophs

Organisms that obtain their energy by consuming other organisms, unable to produce food internally.

Organic Molecules

Chemical compounds containing carbon that are found in living organisms, including carbohydrates, proteins, lipids, and nucleic acids.