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:

Sucrose

A disaccharide sugar composed of glucose and fructose, commonly known as table sugar, used by organisms as a source of energy and carbon.

Humus

The organic component of soil, formed by the decomposition of leaves and other plant material by soil microorganisms.

Silt

Fine granular material often found on riverbeds, composed of rock and mineral particles.

Clay

A fine-grained natural soil material containing clay minerals, used in ceramics and as a building material due to its plasticity when wet.