exam 3- practice test 1

Question 1

Enzyme that is responsible for synthesizing RNA

Answer 1

transcriptase

Question 2

DNA directly participates in

Answer 2

replication and transcription

Question 3

Genetic and metabolism are tied together by the fact that:

Answer 3

the genes code for enzymes that catalyze reactions that result in characteristics

Question 4

All of the following bases are found in RNA except:
- adenine
- cytosine
- guanine
- thymine
- uracil

Answer 4

thymine

Question 5

always a change in base sequence and sometimes a change in amino acid sequence

Answer 5

silent mutation

Question 6

The codon, UGA, would function as a stop codon on

Answer 6

mRNA

Question 7

Product of translation

Answer 7

a protein (polypeptide)

Question 8

Which require(s) living donor and recipient cells:

Answer 8

conjugation only

Question 9

Erectile dysfunction can be caused by

Answer 9

cigarette smoke

Question 10

The following use(s) sex pheromones

Answer 10

gram-positive conjugation

Question 11

Which of the following is due to a mistake in packaging of DNA

Answer 11

transduction

Question 12

Chemicals in cigarette smoke that selectively cause cells with a mutation to replicate more than cells without a mutation are called

Answer 12

promoters

Question 13

Restriction enzymes are important because they

Answer 13

generate overlapping sticky ends on DNA

Question 14

A method of one-way gene transfer that requires cell-to-cell contact is

Answer 14

conjugation

Question 15

Which are not methods of sterilization

Answer 15

pasteurization and lyophilization

Question 16

Endospores have resistance to some levels of ionizing radiation because they are

Answer 16

desiccated

Question 17

If you were asked to sterilize a heat-sensitive item (and not cause damage to the item), which of the following would be most suitable

Answer 17

ethylene oxide (carboxide)

Question 18

Membrane filtration:

Answer 18

does not necessarily remove viruses

Question 19

Major targets for disinfectant action include:

Answer 19

cell proteins and cell membranes

Question 20

The most practical and efficient method of physical control is:

Answer 20

heat

Question 21

Which term refers to a chemical that is used at safe levels in accordance with public health requirements:

Answer 21

sanitizer

Question 22

The chemical that is the active ingredient in lysol is:

Answer 22

cresol

Question 23

the difference between an antiseptic and a disinfectant is:

Answer 23

antiseptics are typically used on the skin

Question 24

criteria for usefulness of an antimicrobial agent does NOT include

Answer 24

destruction of normal flora

Question 25

a chemical that is not used much anymore because it is carcinogenic is

Answer 25

formaldehyde

Question 26

the most famous antibiotic, the first one discovered, one that inhibits bacterial cell wall synthesis, is

Answer 26

penicillin

Question 27

an example of a chemically-synthesized chemotherapeutic agent is:

Answer 27

sulfonamide

Question 28

is a chemical agent that is the product of some organism’s metabolism

Answer 28

an antibiotic (by definition)

Question 29

for a non-growing (stationary phase) bacterial culture, which should be most effective as an antimicrobial agent?

Answer 29

polymyxin B

Question 30

what is the drug of choice to treat anthrax

Answer 30

cipro

Question 31

measures to minimize drug resistance include

Answer 31

discriminate use, drug dose high and combination of drugs

Question 32

conceivably, the most common mechanism of microbial resistance is:

Answer 32

alteration of target molecule

Question 33

many cases of the flu on a college campus would be referred to as a(an

Answer 33

epidemic

Question 34

which of the following is a factor in the development of disease?
- number of pathogens
- vector
- ability to flourish outside of the body

Answer 34

all of the above

Question 35

cholera, a very serious disease in many areas of the world, is normally transmitted via the

Answer 35

gastrointestinal tract

Question 36

an example of a disease normally transmitted via the blood is:

Answer 36

hepatitis

Question 37

a disease organism that is present in high numbers in a specific geographical location is referred to as an

Answer 37

endemic

Question 38

which organism requires fimbriae to stick to the lining of the genitourinary tract?
- S. pneumoniae
- HIV
- the bacterium that causes cholera
- E. coli

Answer 38

E.coli

Question 39

what has been shown to remain active and infectious for hours on a toilet set?

Answer 39

herpes virus

Question 40

which of the following diseases requires a tick vector for transmission

Answer 40

rocky mountain spotted fever