You Have Performed the Following Mating Experiment Using Hfr and F-Strains

question 78

Multiple Choice

You have performed the following mating experiment using Hfr and F-strains of Escherichia coli: Hfr (thr⁺ leu⁺ gal⁺ strˢ) × F⁻ (thr⁻ leu⁻ gal⁻ strʳ) . Which of the following selective media would you use to score recombinant colonies?

• A) minimal medium
• B) minimal medium + streptomycin
• C) minimal medium + threonine
• D) minimal medium + streptomycin + threonine

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Definitions:

Heart Rate

The number of heartbeats per unit of time, usually measured in beats per minute (bpm), indicative of cardiovascular health and physical condition.

Parasympathetic Nerve

A part of the autonomic nervous system that conserves energy as it slows the heart rate, increases intestinal and gland activity.

Sympathetic Nerve

A part of the autonomic nervous system that generally stimulates the body's fight or flight response.

Capillaries

The smallest blood vessels in the body, responsible for the exchange of water, oxygen, carbon dioxide, and other nutrients and waste substances between blood and tissues.