Microbiology Practice Exam #4 – EXAM 3

DNA replication is

DNA directly participates in

The Genetic Code is a series of

Genetics and metabolism are tied together by the fact that

Which of the following is a product of translation?

a. A new strand of DNA
b. rRNA
c. tRNA
d. mRNA
e. none of the above

Genetic change in bacteria can be brought about by

a. Mutation.
b. Conjugation.
c. Transduction.
d. Transformation.
e. All of the above.

A mutation is

The most common mutation is probably a

Which might result due to laboratory exposure to ultraviolet radiation?

Caffeine

The type of RNA that delivers amino acids to the ribosome is

Chemicals in cigarette smoke that ultimately lead to cancer are called

Which method of one-way-gene-transfer requires that the donor cell to be alive?

Which type of one-way-gene-transfer makes use of pheromones?

Which method of one-way-gene-transfer takes advantage of a mistake in phage DNA packaging?

Conjugation in bacteria

Genetic modification procedures can be used to

a. Clone genes for pest resistance.
b. Produce human growth hormone.
c. Clone genes for toxic waste clean up.
d. All of the above.
e. None of the above.

Restriction endonucleases are important because they

Which of the following are methods of sterilization?

a. Autoclave, oven, pasteurization, boiling water
b. Incineration, boiling water, oven, ionizing radiation
c. Oven, ionizing radiation, incineration, membrane filtration
d. Membrane filtration, oven, boiling water, autoclave
e. Ultraviolet radiation, ionizing radiation, oven, boiling water

Pasteurization is designed to kill the organism that causes

Which method of physical control results in production of free radicals from water?

A useful method or compound for sterilizing foods is

Which physical method of control has no effect on endospores?

Which of the following is a sterilization agent?

a. Ethyl alcohol
b. Ethylene oxide (carboxide)
c. Hydrogen peroxide
d. Phenol
e. Bleach

The major targets for disinfectant action are

An agent used to reduce the number of bacteria on a bed pan would most accurately be called a(an)

Which of the following would not be used as an antiseptic?

a. Iodine
b. Ethyl alcohol
c. Bactine
d. Ethylene oxide
e. Hydrogen peroxide

Which of the following is true with respect to Variables of Disinfection?

a. In general, the lower the concentration, the more effective.
b. The higher the temperature, the more effective.
c. The shorter the time, the more effective.
d. pH will not have an effect on disinfection.
e. All of the above are true.

The difference between an antiseptic and a disinfectant is

Criteria for usefulness of an antimicrobial agent does NOT include

a. Destruction of normal flora.
b. Low in toxicity to host.
c. Destroying or inhibiting disease organism.
d. Host should not become allergic.
e. Disease organism should not become resistant.

Antibiotics are

The first antibiotic isolated, penicillin, works by

A nosocomial infection

Endotoxin

When disease symptoms develop rapidly, typically with a high fever, the person has

E. coli and Neisseria gonorrhoeae (the organism that causes gonorrhea) use what to stick to the lining of the genitourinary tract?

The flu pandemic of 1918-19 was deadlier than most yearly flu outbreaks. This is referred to as a difference in

Which of the following is NOT a factor in the development of disease?

a. Portal of entrance
b. Virulence
c. Contamination
d. Vector
e. Number of pathogens

The bubonic plague bacterium is constantly in the San Francisco Bay area. This is an example of a(an)

The antibiotic of choice to treat anthrax is