Refer to the Hypothetical Data Set Comparing the Gene Content

question 228

Multiple Choice

Refer to the hypothetical data set comparing the gene content of Salmonella and Shigella, of which all strains are pathogenic, and the pathogenic and nonpathogenic strains of E.coli.(Note: "x" denotes presence of the gene.) Which is the most likely conclusion about gene C?

• A) It may be involved in pathogenicity and was acquired from Salmonella strain 1.
• B) It may be involved in pathogenicity and was acquired from Salmonella strain 2.
• C) It may be involved in pathogenicity and was acquired from Shigella.
• D) It may be involved in pathogenicity, and its origin is unclear.
• E) It is unlikely to be involved in pathogenicity.

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Definitions:

Chlorine

A chemical element with symbol Cl and atomic number 17, known for its powerful disinfectant properties and used in water purification.

Symbol Cu

The chemical symbol for Copper, a reddish-brown metal with high thermal and electrical conductivity.

Copper

A reddish-brown, malleable, ductile metallic element with high electrical and thermal conductivity, used in a variety of alloys and in electrical wiring.

Symbol Co

The symbol Co stands for cobalt, which is a chemical element with atomic number 27, known for its magnetic properties and used in alloys and batteries.