Exam 9: Controlling Microbial Growth in the Environment

What is the in- use test, and why is it more useful than other methods of evaluating disinfectants?

All of the following are components of an autoclave EXCEPT:

UV light of any wavelength creates pyrimidine dimers in DNA molecules.

All of the following sterilize EXCEPT:

Although they are excellent antimicrobial agents, must be used with care because they are often highly explosive.

Describe the cellular structures or processes that can be targets of antimicrobial agents.

Sterilization procedures generally focus on the inactivation or elimination of bacterial .

Antimicrobial agents usually work best at high temperatures and pH levels.

Ultraviolet light penetrates materials (better than/worse than) gamma rays.

Some viruses are inactivated by the same chemical or physical agents that damage cell membranes.

A chemical agent that kills pathogenic microbes in general is a(n)

Elements such as iodine, chlorine, and bromine are examples of _ , which are the basis for many effective antimicrobial agents.

Betadine is an example of which of the following?

Antimicrobial chemicals produced naturally by microorganisms are called .

Which of the following is an example of degerming?

A(n) is an iodine- containing organic compound found in such antiseptics as Betadine.

Which of the following would NOT be bacteriostatic?

Boiling water rapidly kills all of the following EXCEPT:

Some antimicrobial agents that work by removal of microbes are just as effective as the agents that kill or inhibit these microbes. Explain why this is so, and give some examples of these types of agents.

Which of the following is used to sterilize items that should not, or cannot, be exposed to heat or water?