quiz 5

Question 1

identify all of the correct statements about plasmids:
A. they are found in all bacteria
B. they are essential for survival
C.they can be passed between organisms
D. they can be passed on to progeny
E. they can be the site of pathogenic genes
F. they can be the site of antibiotic resistance genes

Answer 1

C.they can be passed between organisms
D. they can be passed on to progeny
E. they can be the site of pathogenic genes
F. they can be the site of antibiotic resistance genes

Question 2

The stationary phase of bacterial growth represents…
A. a period during which bacteria are dormant
B. a period during which bacterial cells are preparing for binary fission
C. a period during which the rate of replication equals the rate of death due to nutrient depletion and waste accumulation
D. a period during which bacterial numbers are increasing
E. a period during which bacterial numbers are decreasing

Answer 2

C. a period during which the rate of replication equals the rate of death due to nutrient depletion and waste accumulation

Question 3

Cultures of a bacterial species were incubated out on the incubator shelf, in an anaerobic jar, and in a candle jar. After incubation, there was moderate growth of cultures in the candle and anaerobic jars, but heavy growth of the culture on the incubator shelf. This species is a/an…
A. aerobe
B. anaerobe
C. facultative anaerobe
D. microaerophile
E. capnophile

Answer 3

C. facultative anaerobe

Question 4

Cultures of a bacterial species were incubated on the shelf of a refrigerator, out on a lab bench top, on the shelf of a 37° C incubator, and on the shelf of a 50° C incubator. After incubation, there was no growth at 37° C and 50° C, slight growth out on the bench top, and abundant growth at refrigeration. What term could be used for this species?
A. halophile
B. mesophile
C. anaerobe
D. psychrophile
E. capnophile

Answer 4

D. psychrophile

Question 5

In _____ conditions, the cell wall will help prevent the cell from bursting.
A. hypertonic
B. hypotonic
C. isotonic
D. mesotonic
E. ginantonic

Answer 5

B. hypotonic

Question 6

Reverse transcriptase synthesizes…
A. viral protein from DNA
B. viral protein from RNA
C. viral RNA from DNA
D. viral DNA from RNA
E. None of the choices is correct

Answer 6

D. viral DNA from RNA

Question 7

The correct sequence of events in viral multiplication is…
A. penetration, uncoating, synthesis, adsorption, assembly, release
B. uncoating, penetration, synthesis, assembly, absorption, release
C. adsorption, penetration, uncoating, synthesis, assembly, release
D. assembly, synthesis, uncoating, release, penetration, adsorption
E. adsorption, release, synthesis, uncoating, assembly, penetration

Answer 7

C. adsorption, penetration, uncoating, synthesis, assembly, release

Question 8

Two noncellular agents, smaller than viruses, are the infectious proteins called _____ and the infectious RNA strands called _____.
A. prions; capsomeres
B. virions; prions
C. viroids; phages
D. prions; phages
E. prions; viroids

Answer 8

E. prions; viroids