A Microbiologist Is Attempting to Determine the Size of a Microbial

question 47

Multiple Choice

A microbiologist is attempting to determine the size of a microbial population and has employed several methods.She noticed that the direct count she obtained using a counting chamber and microscope was much higher than her estimate from doing a viable plate count.This discrepancy was encountered during multiple trials.What is the most likely reason for the discrepancy?

• A)She counted incorrectly.
• B)She did not correctly do the serial dilutions prior to the viable plate count.
• C)Many of the organisms viewed during the direct count may be dead.
• D)The medium and growth conditions used for the viable count will not support the growth of the organisms.
• E)The organisms were not readily cultured on the viable count,either because many were dead or because the medium and growth conditions used for the viable count will not support the growth of the microorganism.

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Definitions:

Wheel Offset

The distance from the hub mounting surface to the centerline of the wheel, affecting how the wheels and tires are positioned in relation to the vehicle's body.

Centerbore

A large hole in the center of a wheel where it mounts to a hub on the vehicle.

Mounting Surface

The area or interface on which a component, device, or mechanism is installed or secured.

Wheel Depth

Measurement of the distance from the outer wheel surface to the mounting plate, important for fitting wheels to a vehicle correctly.