Nester's Microbiology: A Human Perspective

Denise Anderson, Sarah Salm, Deborah Allen

Chapter 3

Microscopy and Cell Structure - all with Video Answers

Educators

Chapter Questions

Problem 1

Which of the following is most likely to be used in a typical microbiology laboratory?
a) Bright-field microscope
b) Confocal scanning microscope
c) Phase-contrast microscope
d) Scanning electron microscope
e) Transmission electron microscope

Sylvia Puglisi

Sylvia Puglisi

Numerade Educator

Problem 2

When a medical technologist wants to determine if a clinical specimen contains a $M y c o b a c t e r i u m$ species, which should be used?
a) Acid-fast stain
b) Capsule stain
c) Endospore stain
d) Gram stain
e) Simple stain

Sylvia Puglisi

Numerade Educator

Problem 3

Vibrio cholerae causes the disease cholera. Based on the name of the bacterium, what is its shape?
a) Spherical
b) Straight cylinder
c) Curved rod
d) Chains of cocci
e) Chains of rods

Sylvia Puglisi

Numerade Educator

Problem 4

Endotoxin is associated with
a) Gram-positive bacteria.
b) Gram-negative bacteria.
c) the cytoplasmic membrane.
d) endospores.

Sylvia Puglisi

Numerade Educator

Problem 5

The "O157" in the name $E$. coli $\mathrm{O} 157: \mathrm{H} 7$ refers to the type of
O antigen. From this information you know that $E$. coli
a) has a capsule
b) is a rod
c) is a coccus.
d) is Gram-positive
e) is Gram-negative.

Sylvia Puglisi

Numerade Educator

Problem 6

Eliminating which structure is always deadly to cells?
a) Flagella
b) Capsule
c) Cell wall
d) Cytoplasmic membrane
e) Fimbriae

Sylvia Puglisi

Numerade Educator

Problem 7

If you interfered with the ability of a Bacillus species to form endospores, what would be the result? The bacterium would no longer be
a) able to multiply.
b) antibiotic resistant.
c) Gram-positive.
d) Gram-negative.
e) able to withstand boiling water.

Sylvia Puglisi

Numerade Educator

Problem 8

If a virus mimics a ligand that normally participates in receptor-mediated endocytosis, the virus might
a) prevent pinocytosis.
b) be taken up by the cell.
c) damage the cytoplasmic membrane.
d) cause the cell to form pseudopods.
e) damage the receptor.

Sylvia Puglisi

Numerade Educator

Problem 9

The antibiotic erythromycin prevents protein synthesis in bacterial cells. Based on this information, which of the following is the most likely target of the drug?
$1.80 \mathrm{S}$ ribosomes
$2.70 \mathrm{S}$ ribosomes
$3.60 \mathrm{S}$ ribosomal subunit
4. $50 \mathrm{S}$ ribosomal subunit
$5.40 \mathrm{S}$ ribosomal subunit
a) 1,3
b) 1,4
c) 2,3
d) 2,4
e) 2,5

Sylvia Puglisi

Numerade Educator

Problem 10

If a eukaryotic cell were treated with a chemical that destroys tubulin, all of the following would be directly affected except
a) actin.
b) cilia.
c) eukaryotic flagella.
d) microtubules.
e) More than one of these.

Sylvia Puglisi

Numerade Educator