Bacteria Transformed with Plasmids Are Plated on Growth Medium Containing

question 88

Multiple Choice

Bacteria transformed with plasmids are plated on growth medium containing ampicillin and X-gal. White colonies on the plate contain bacteria with a ____ plasmid, meaning the lacZ⁺gene is ____.

• A) recombinant; deleted from the plasmid
• B) nonrecombinant; intact
• C) recombinant; intact
• D) nonrecombinant; disrupted by the inserted DNA fragment
• E) recombinant; disrupted by the inserted DNA fragment

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Definitions:

Histones

Proteins around which DNA winds, playing a crucial role in chromosome structure and gene regulation.

DNA Methylation

A biochemical process involving the addition of a methyl group to the DNA molecule, influencing gene expression without changing the DNA sequence.

Homologous Chromosomes

Pairs of chromosomes that have the same structure and gene sequence, one inherited from each parent.

Genetic Variation

The diversity of genetic characteristics within a species or population, which is a result of mutations, genetic recombination, and other processes.