Chapter 9 Worksheets

Question 1

Gamma rays, X-rays, and electron bean

Answer 1

Ionizing radiation

Question 2

Non-penetrating radiation

Answer 2

Non-ionizing radiation

Question 3

Can be used to separate mixtures of
microorganism

Answer 3

Filtration

Question 4

Moist heat techniques that do not lead to sterilization

Answer 4

Pasteurization, Boiling

Question 5

Type of radiation that is effective in
sterilizing transparent fluids and gases

Answer 5

Non-ionizing radiation

Question 6

Ignites microbes to ashes and gas

Answer 6

Dry Heat

Question 7

Leads the formation of pyrimidine
dimers (thyme dimers)

Answer 7

Non-ionizing radiation

Question 8

Dislodges electrons from atoms

Answer 8

Ionizing radiation

Question 9

Bacterial DNA repair mechanisms
counter acts this type of radiation

Answer 9

Non-ionizing radiation

Question 10

Uses mild heat to reduced microbial
populations in heat sensitive food

Answer 10

Pasteurization

Question 11

Can be used to sterilize air and heat
sensitive fluids (vaccines, antibiotics, liquid
vitamins, enzymes, and culture media)

Answer 11

Filtration

Question 12

Hypertonic solutions cause
dehydration of microbial cells

Answer 12

Osmotic Pressure

Question 13

Examples include flame of Bunsen
Burner, ovens, and incinerators

Answer 13

Dry Heat

Question 14

Ultraviolet Light Rays

Answer 14

Non-ionizing radiation

Question 15

Moist heat techniques that allow
destruction of all organisms

Answer 15

Ultra-High-Temperature Sterilization, Autoclaving

Question 16

Lead to decreased microbial
metabolism, growth, and reproduction

Answer 16

Refrigeration, Freezing, Lyophilization, Osmotic Pressure

Question 17

Compare to dry heat this type of
heat is more effective

Answer 17

Moist Heat

Question 18

Denatures proteins and destroy
membranes

Answer 18

Pasteurization, Autoclaving, Boiling, Ultra-High-Temperature Sterilization, Hot Air, Moist Heat

Question 19

Destroy DNA

Answer 19

Ionizing radiation

Question 20

Used for long storage of bacterial
cultures

Answer 20

Freezing, Lyophilization

Question 21

Sterilization of dairy products

Answer 21

Ultra-High-Temperature Sterilization

Question 22

Sterilization of powders, oils and
metals

Answer 22

Hot Air

Question 23

Common household H2O2 disinfectant and sterilizing agent used on surfaces of inanimate objects such as a contact lenses.

Answer 23

Oxidizing Agents, Hydrogen peroxide

Question 24

Used to sterilized instruments and
equipment sensitive to heat.

Answer 24

Ethylene Oxide

Question 25

This chemical does not make a good antiseptic for open wounds because damaged human cells release catalase, which neutralizes it.

Answer 25

Hydrogen peroxide

Question 26

This chemical evaporates much more slowly than chloride at high temperatures

Answer 26

Halogen- Bromine

Question 27

Is a halogen that serves as an effective disinfectant in hot tubs, cooling

Answer 27

Halogen- Bromine

Question 28

Example include soaps and detergents.

Answer 28

Surfactants

Question 29

Natural oils, such as pine and clove oils used as antiseptics

Answer 29

Phenol

Question 30

This chemical is capable of sterilization after long periods of exposure.

Answer 30

Aldehyde- Glutaraldehyde

Question 31

This chemical is a bactericidal fungicidal and virucidal against enveloped viruses but does not achieved sterilization.

Answer 31

Alcohol

Question 32

This chemical is an antiseptic used to prepare skin for surgery and injections and to treat burns.

Answer 32

Halogen- Iodophor- Betadine

Question 33

Alone or as tinctures, 70% solutions better protein coagulation than 100%

Answer 33

Alcohol

Question 34

This product is incorporated into numerous products like, garbage bags, diapers, and cutting boards.

Answer 34

Bisphenolics- Triclosan

Question 35

This chemical reduces the surfaces tension of solvents such as water by decreasing the attraction among molecules.

Answer 35

Surfactants

Question 36

Antibacterial agent used in drinking water and toothpastes.

Answer 36

Halogen- Fluorine

Question 37

Examples such peracetic acid to sterilize invasive equipment, Ozone used with chlorination.

Answer 37

Oxidizing Agents

Question 38

General disinfectant e.g. carbolic acid, Lysol.

Answer 38

Phenol

Question 39

NASA used this chemical agent to sterilize spacecraft.

Answer 39

Ethylene Oxide

Question 40

Copper, zinc, or mercury are used to control mildew in some paint.

Answer 40

Heavy metals

Question 41

Used as a preservative for organs, tissues, biopsy, specimens.

Answer 41

Aldehyde- Formalin