Which of the Following Is NOT Correct Regarding the Broad-Spectrum

question 34

Multiple Choice

Which of the following is NOT correct regarding the broad-spectrum antibiotic erythromycin?

• A) It is a polyketide where all R = -CH₃.
• B) It was originally isolated from Streptomyces erythraeus.
• C) It is a polyketide where R = -CH₃ or -CO-NH₂.
• D) All of the above.
• E) None of the above.

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Definitions:

Atrioventricular Node

A part of the cardiac conduction system that controls the heart rate by delaying the transmission of electrical impulses from the atria to the ventricles.

Bundle of His

A collection of heart muscle cells specialized for electrical conduction that transmits the electrical impulses from the AV node to the ventricles of the heart.

Telangiectasis

The dilation of small or terminal blood vessels, causing spider-like or threadlike red lines or patterns on the skin or mucous membranes.

-Ectasis

A suffix indicating dilation or expansion of a hollow organ or vessel.