A Microbiologist Suspects a Strain of Staphylococcus Aureus Is Resistant

question 61

Multiple Choice

A microbiologist suspects a strain of Staphylococcus aureus is resistant to methicillin.What would be the best approach to test this suspicion?

• A)Perform a Gram stain.
• B)Sequence the chromosome looking for resistance genes.
• C)Calculate the doubling time for the bacteria.
• D)Inject the bacteria into a host animal and look for disease symptoms.
• E)Add methicillin to the growth plates.

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Definitions:

Selectively Permeable

A characteristic of cell membranes that allows certain molecules or ions to pass through it by means of active or passive transport, while blocking others.

Transport Proteins

Proteins that span the cellular membrane and regulate the movement of substances across it, essential for cellular function and homeostasis.

Cytoplasm

The jelly-like substance within a cell that contains the organelles and is enclosed by the cell membrane.

Biofilm

Community of microorganisms living within a shared mass of secreted slime.