Ch. 7 - Controlling Microbial Growth

Chemotherapy is a treatment with chemicals.

• True

• False

The thermal death point is the lowest temperature required to kill a liquid culture of a certain species of bacteria in 10 minutes.

• True

• False

Tags

NGSS.HS-PS3-4

The suffix -cide means “to survive.”

• True

• False

The pH of the medium has no effect on the activity of the disinfectant being applied.

• True

• False

Asepsis is the absence of pathogens on an object or area.

• True

• False

_______________ are chemicals produced by bacteria and fungi that inhibit or kill other microbes.

• plasmas

• disinfectants

• antiseptics

• antibiotics

Antimicrobial agents that kill microorganisms would be classified as ______________.

• microbistatic

• microbicidal

To sterilize the field in a BSL-1 introductory microbiology lab, we use ethanol to wipe down surfaces. What concentration of ethanol is the most effective bactericide?

• 50 %

• 70 %

• 95 %

• 100 %

Tags

NGSS.HS-PS1-5

When all forms of microbial life have been removed or destroyed, it is ______

• disinfected

• sterilized

• neutralized

• pasteurized

Milk and other beverages undergo a mild heating process to destroy a particular spoilage or disease-causing organism. this is known as

• sterilization

• pasteurization

• decontamination

• degerming