Exam 11: Physical and Chemical Control of Microbes

The minimum sterilizing conditions in a steam autoclave are

Removal of moisture by dehydration is called ______.

Which of the following does not affect microbial nucleic acids?

Which control method would not be a suitable choice for killing Mycobacterium in a capped culture tube?

In lab, inoculating loops are sterilized using ______.

Scrubbing or immersing the skin in chemicals to reduce the numbers of microbes on the skin is ______.

Vials of microorganisms that undergo the freeze-drying process, called _____, will remain preserved and viable for years.

When a control agent targets the metabolic processes of microbial cells, active younger cells typically die more rapidly than older cells.

_____ is a control method that removes microorganisms rather than inhibiting or killing them.

The use of a physical or chemical process to destroy vegetative pathogens on inanimate objects is ______.

Your friend Joe recently visited the doctor for steroid injections into his knee to reduce swelling due to a previous knee injury.Within a couple of days, he had an infection caused by Pseudomonas, a very pathogenic and drug resistant bacterium.Luckily, Joe went to the doctor immediately and received antibiotics.The doctor tells him that the same problem has occurred to many other people across the United States.Predict the most likely cause of this situation.

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

Alcohols

Microbial death occurs when there is

A method for sterilizing milk, called _____ treatment, uses 134°C for 1 to 2 seconds.

Physical agents for controlling microbial growth include all of the following except ______.

Which antimicrobial method does not sterilize?

Placing organisms at 4^oC is ______.

The compound that is an organic base containing chlorine and two phenolic rings, and is used increasingly for wound degerming, neonatal washes, hand scrubbing, and prepping surgical skin sites is ______.

Some microbial control agents are able to _____ cell proteins by breaking bonds that maintain the native state, the three-dimensional configuration of the proteins.