Unit VI Quiz Flashcards Preview

BIO 119-352 > Unit VI Quiz > Flashcards

Flashcards in Unit VI Quiz Deck (20):
1

Types of radiation that can be sporadical

xray
gamma ray
ultraviolet radiation

2

When would you use an oven for microbial control?

to sterilize glassware, powders, or oils

3

Which antimicrobial agent is the best hope for combating the avian flu virus

tamiflu (oseltamivir)

4

What method of handling microbes prevents infection of tissues

aseptic technique

5

What affects how successful disinfection of an object will be?

pH
concentration of agent and time applied
type of microbe present
presence of organic matter

6

T or F: the presence of blood, saliva, and feces can inhibit an agent from killing a culture of bacteria

true

7

____ are beneficial microbes that compete with pathogens for resources

probiotics

8

Pathogen A is more resistant to an tetracycline disc on a Kirby-Bauer diffusion susceptibility plate compared to Pathogen B. Pathogen A will have a(n) ___ zone of inhibition compared to Pathogen B.

smaller

9

Electrons are ejected from atoms in cells when organisms are exposed to

gamma and X rays

10

Heavy metal that is toxic to humans in minute doses

mercury

11

Gas used to clean anthrax from the US Senate offices in 2001.

chlorine dioxide

12

Kills microbes by producing toxic free radicals

hydrogen peroxide

13

gaseous chemosterilant used in a chemiclave

ethylene oxide

14

used to disinfect drains, cesspools, and animal quarters

phenolics

15

Antimicrobial agent that inhibits DNA hyrase

fluoroquinolone

16

The lowest temperature required to kill a suspension of bacteria in 10 minutes

the thermal death point

17

which is effective against spores

formaldehyde

18

drug resistance is

an adaptive response where the population contains higher numbers of microbes that are not killed by the drug

19

Which molecule looks like a substrate and sits in the active site of an enzyme

structural analog

20

Which about microbial drug resistance is correct?

a prescription of two drugs can show synergism in their effect against microbes