MICRO TEST 4 ( CHAPTER 9 CONTROLLING MICROBIAL GROWTH IN THE ENVIRONMENT)

Question 1

eliminates all organisms and their spores or endospores.

Answer 1

Sterilization

Question 2

substances or processes that kill microorganisms on laboratory surfaces

Answer 2

Disinfectants

Question 3

disinfecting of cafeteria plates

Answer 3

Sanitization

Question 4

The microbial death rate is used to measure

Answer 4

All of these

Question 5

Which of the following statements is true concerning the selection of an antimicrobial agent?

Answer 5

All of these.

Question 6

The spores of which organism are used as a biological indicator of sterlization?

Answer 6

Bacillus stearothermophilus

Question 7

A company that manufactures an antimicrobial cleaner for kitchen counters claims that its product is. effective when used in a 50% water solution. By what means might scientists best verify this statement?

Answer 7

In -use test

Question 8

Which of the following items functions most like an autoclave?

Answer 8

A pressure cooker

Question 9

The preservation of beef jerky from microbial gross relies on which method of microbial contor

Answer 9

Desiccation

Question 10

Which of the following types of radiation is more widely used as an antimicrobial technique?

Answer 10

Electron beams

Question 11

Which of the following substances would most effectively inhibit anaerobes?

Answer 11

Hydrogen peroxide

Question 12

Which of the following adjectives best describes a surgical procedure that is free of microbial contaminants?

Answer 12

Aseptic

Question 13

Biosafety Level 3 includes _

Answer 13

Double sets of entry doors

Question 14

A sample of E, coli has been subjected to heat for a specified time, and 90% of the cells have been destroyed. Which of the following terms best describes this event?

Answer 14

Decimal reduction time

Question 15

Which of the following substances is least toxic to humans?

Answer 15

Hydrogen peroxide

Question 16

Which of the following chemicals is active against bacterial endospores?

Answer 16

Ethylene oxide

Question 17

Which of the following disinfectants acts against cell membranes?

Answer 17

Phenol

Question 18

Which of the following disinfectants contains alcohol?

Answer 18

A tincture of bromide

Question 19

Which antimicrobial chemical has been used to sterilize spacecraft?

Answer 19

4. Ethylene oxide

Question 20

Which class of surfactants is most soluble in water?

Answer 20

Quaternary ammonium compounds