Which of the Following Techniques Exemplifies Phenotypic Rescue in a Host

question 67

Multiple Choice

Which of the following techniques exemplifies phenotypic rescue in a host cell?

• A)Introducing a genomic library from a cell that produces a particular gene product into a mutant host cell auxotroph that cannot synthesize the product.
• B)Introducing a genomic library from a mutant cell auxotroph for a particular gene product into a host cell that can synthesize that product constitutively.
• C)Removing genes that encode a particular gene product from a cell that expresses that product constitutively before creating a genomic library.
• D)Replacing a mutant gene with a functional gene in a DNA library from an auxotrophic mutant cell prior to introducing the library into a related host cell.

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Definitions:

Amphetamines

A class of stimulant drugs that can increase energy and concentration while decreasing appetite and fatigue.

Epinephrine

A hormone and neurotransmitter also known as adrenaline, involved in regulating heart rate, blood vessel and air passage diameters.

Chemically Similar

Substances that share similar chemical structures or properties.

Crystalline Form

The solid state of a substance in which the atoms or molecules are arranged in a highly ordered, repeating pattern.