Test 3

1.

1 point

A lipid "membrane" that was once part of the now dead host cell is present in which of the following?

enveloped viruses

prions

naked viruses

viroids

2.

1 point

Which of the following chemical methods of control is mismatched?

surfactants – cepacol

phenol – triclosan

alcohols – isopropanol

halogen – iodine

heavy metals – sodium hypochlorite

3.

1 point

A cell is infected with a virus carrying an oncogene sequence in its genome. What may occur if the oncogene is expressed in the infected cell?

lysogeny

latency

neoplasia

lysis

4.

1 point

Populations of pathogens may develop drug resistance due to

chromosomal mutations

acquisition of R plasmids

both are correct

5.

1 point

Which of the following is a factor that affects how well an antimicrobial method works?

nature of site to be treated

susceptibility of specific microbe

temperature

pH

all of these

6.

1 point

Eukaryotic sexual reproduction requires the process known as

budding

mitosis

binary fission

meiosis

7.

1 point

Put the following stages of a lytic replication cycle in order from first to last:

I. Synthesis II. Assembly III. Attachment IV. Release V. Entry

III, II, V, I, IV

I, III, V, II, IV

III, V, I, II, IV

V, III, II, IV, I

8.

1 point

Each of the following is the target of antimicrobial agents except

cell walls

DNA

ribosomes

cytoplasm

cell membranes

9.

1 point

Pleomorphic bacteria

reproduce by snapping division

have a slightly curved rod shape

vary in size and shape

are roughly spherical

10.

1 point

A large number of Gram-negative human pathogens are members of the

gammaproteobacteria

deltaproteobacteria

alphaproteobacteria

betaproteobacteria

11.

1 point

Which of the following laboratory procedures is used for culturing animal viruses?

cell cultures and embryonated eggs

cell cultures

broth cultures

embryonated eggs

12.

1 point

Which of the following is incorrectly matched?

bacterial endospores – extremely resistant to antimicrobial agents

enveloped viruses – extremely susceptible to antimicrobial agents

microbial death rate – calculated as 90% killed within certain period of time

Biosafety Level 1 – use of HEPA filters

13.

1 point

Fungi are extremely beneficial to life on Earth because

they decompose dead organisms particularly plants

about 90% of vascular plants form mycorrhizae with fungi to help their roots absorbed dissolved minerals

humans use unicellular yeasts to make bread and alcoholic beverages

they produce many antibiotics

all of these are correct

14.

1 point

Each of these is a way of testing the effectiveness of a particular drug against a specific microbe except

Minimum Inhibitory Concentration Test

TI (Therapeutic Index)

Minimum Bactericidal Concentration Test

E-Test

Kirby Bauer Diffusion Susceptibility Test

15.

1 point

Which of the following is primarily responsible for the shape of a virus

type of nucleic acid

spikes

envelope

capsid

16.

1 point

Bacteria described as "Low G + C"

Gram stain pink and are cocci

are Gram-negative Cyanobacteria

include filamentous Actinomycetes

have DNA composed of more than 50% AT pairs

17.

1 point

Which of the following terms associated with routes of drug administration is mismatched?

IV route – direct delivery to blood

IM route – highest blood levels

oral route – low blood levels

18.

1 point

Biological vectors are insects or arachnids that bite you for a meal of blood as part of their life cycle. Which of the following is NOT a biological vector?

house fly

ticks

mosquitoes

flea

19.

1 point

Mycoplasmas are pleomorphic and stain like Gram-negative bacteria (i.e. pink) because they

are low G + C content Gram-positive bacteria

have sterols in their cytoplasmic membranes

produce endospores

have no cell walls

20.

1 point

Who proposed the concept of chemotherapy, that compounds might selectively kill pathogens without harming people, i.e. selective toxicity?

Joseph Lister

Gerhard Domagk

Alexander Fleming

Paul Ehrlich

21.

1 point

When conditions become inhospitable, members of the genera Clostridium and Bacillus produce an internal durable, dormant form by the process of

budding

conjugation

sporulation

binary fission

22.

1 point

Which of the following DNA viruses is mismatched with a disease it causes?

Papillomaviridae – cervical cancer

Poxviridae – smallpox

Hepadnaviridae – conjunctivitis

Herpesviridae – Chicken Pox

23.

1 point

Physical agents for controlling microbial growth include all the following except

UV radiation

sodium hypochlorite

HEPA filter

boiling water

24.

1 point

Antimicrobials effective against a wide variety of microbial types are termed

broad-spectrum drugs

antibiotics

synthetic drugs

semisynthetic drugs

narrow-spectrum drugs