Viruses Are Isolated from Wild-Type E

question 9

Multiple Choice

Viruses are isolated from wild-type E.coli cells that have been infected with wild-type bacteriophage λ.These viruses are used to infect a Gal⁻ strain of E.coli.A few bacterial colonies that can grow on galactose are obtained, while no bacteria that can grow on galactose are obtained from cells that were not infected.What has happened?

• A)A λ gal⁺ phage was generated.
• B)Reversion mutations have occurred.
• C)The bacteria underwent conjugation with a Gal⁺ strain.
• D)The bacteria underwent transformation with a wild-type E.coli strain.

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Definitions:

Fossa

A depression or hollow, often found in bones or in the body, serving various purposes like accommodating muscles or organs.

Sinus

A cavity within a bone or other tissue, most commonly found in the nose and respiratory system.

Chondrocostal

Pertaining to the cartilage connected to the ribs, often used in the context of the chest structure and related conditions.

Chondral

Pertaining to or involving cartilage, often used in the context of joint diseases and conditions.