Micro Chapter 3

Multiple Choice

The standard unit of measure of length used in the metric system is the liter.

• True

• False

Multiple Choice

The objectives of a compound microscope are a part of the illuminator system.

• True

• False

Multiple Choice

RBCs measure 7 micrometers.

• True

• False

Multiple Choice

Refractive index refers to the contrast between the specimen and the slide on which it is mounted.

• True

• False

Multiple Choice

The part of the microscope that controls the amount of light is the...

• Objective

• Ocular

• Condenser

• Stage

Multiple Choice

Transmission and scanning microscopes use a condenser lens to allow the viewing of extremely small microbes.

• True

• False

Multiple Choice

Auramine O is a fluorescent dye used to visualize Mycobacterium tuberculosis.

• True

• False

Multiple Choice

When using a dark field microscope, only direct light rays are permitted to enter the field.

• True

• False

Multiple Choice

Which of the following microscopes forms a halo around the specimens?

• Dark field

• TEM

• SEM

• Phase contrast

Multiple Choice

Laboratory staining methods allow for the visualization of live specimens.

• True

• False

Multiple Choice

Mordant is a chemical additive that may decrease the affinity of dye to a cell structure.

• True

• False

Multiple Choice

Gram-positive microbes will take on a red or pink color.

• True

• False

Multiple Choice

When performing acid-fast staining methods, bacteria that remain red are considered to be acid-fast.

• True

• False

Multiple Choice

Gentian violet can be used as a counterstain for acid-fast staining.

• True

• False

Multiple Choice

Some bacteria can form a protective barrier against harsh conditions known as a ....

• Flagellum

• Cilia

• Plaque

• Spore

Multiple Choice

Woese and Hesse are credited with the discovery of using agar in the lab.

• True

• False

Multiple Choice

Which of the following structures allows the motility of the microbes and requires the use of Mordant to view?

• Cilia

• Capsule

• Flagella

• None of the above

Multiple Choice

Why is capsule difficult to stain?

• Capsules are water soluble

• Capsules become gelatinous in media

• They are not difficult to stain

• None of the above

Multiple Choice

Reducing media is used to support the growth of aerobic microbes.

• True

• False

Multiple Choice

Bacteria with complex nutritional needs are referred to as enriched.

• True

• False

Multiple Choice

Staphylococcus aureus ferments mannitol salt and turns the agar what color?

• Blue

• Red

• Pink

• Yellow

Multiple Choice

Blood agar is a combination of nutrients and the erythrocytes from what animal?

• Cat

• Cow

• Sheep

• Horse

Multiple Choice

Chocolate agar does, in fact, contain chocolate.

• True

• False

Multiple Choice

There are two common serology tests that require Antisera.

• True

• False

Multiple Choice

ELISA is commonly used in labs with computer scanning which allows for quick results.

• True

• False

Multiple Choice

Catalase positive results are marked by the appearance of what?

• CO2

• Steam

• Bubbles

• Salt

Multiple Choice

When performing a coagulase test, if plasma clumps together it is most likely indicative of what microbe?

• E. Coli

• S. aureus

• S. cocci

• None of the above

Multiple Choice

Phage typing is used to identify sources of HAIs.

• True

• False

Multiple Choice

Nucleic acid based comparisons are used for classifying microbes with evolutionary relationships.

• True

• False

Multiple Choice

The hanging drop technique developed by Hesse can test a microbes mobility.

• True

• False

Multiple Choice

RT-LAMP usually provides results in 30 minutes.

• True

• False