MacConkey Agar Is Selective in That It Inhibits Gram-Positive Bacterial

question 22

Multiple Choice

MacConkey agar is selective in that it inhibits Gram-positive bacterial growth and differential in that it distinguishes ________ from other coliforms that are unable to ferment lactose.

• A) Staphylococcus aureus
• B) Salmonella
• C) Shigella dystenteriae
• D) Escherichia coli

---

Definitions:

Gear Lube

A lubricant specifically formulated for gearboxes and transmissions to protect against wear, reduce friction, and ensure smooth gear changes.

Axle Grease

A thick, viscous lubricant applied to the axles of vehicles to reduce friction and wear between moving parts.

Oscillating Bolster

A structural component on rail vehicles or trailers that supports the load and allows for pivoting or oscillation to accommodate uneven terrain.

High Rigidity

A characteristic of materials or structures that resist deformation under load, ensuring stability and durability.