Exam 18: Control of Microbial Growth with Disinfectants and Antiseptics

Answer true or false to the reason given in the following statement: The death of a microbe such as a bacterium can be hard to identify,because it is difficult to detect DNA synthesis.

A bacteriostatic agent is one that

Answer true or false to the reason given in the following statement: Surfactants are very effective for disrupting the plasma membrane of cells because surfactant molecules are oxidants.

Answer true or false to the reason given in the following statement: Ionizing radiation useful because it sterilizes without using heat or chemicals.

Which of the following is a mismatched pair?

Answer true or false to the reason given in the following statement: Hydrogen peroxide is not useful for the treatment of open wounds because the enzyme,lysozyme,which is released from damaged tissues,quickly neutralizes it.

Answer true or false to the reason given in the following statement: As the plasma membrane is responsible for enclosing the cytoplasm its loss or damage produces death.

Answer true or false to the reason given in the following statement: Because the phospholipid bilayer of plasma membranes is nonpolar,they have hydrophobic and hydrophilic regions.

Answer true or false to the reason given in the following statement: The flash method of pasteurization is preferable because it is more effective against Staphylococcus and Streptococcus.

Which of the following is not susceptible to the effects of surfactants?

Answer true or false to the reason given in the following statement: The environment in which the microbes to be treated exist is important,because many pathogens will be associated with organic materials such as blood and saliva.

Which of the following is a mismatched pair?

Identify and describe five factors that affect the death of microbes by antimicrobial agents.

Which of the following is not used as an antiseptic for skin?

The microbial death rate associated with antimicrobial agents is

Which of the following statements is true?

Which of the following is used to destroy endospores in a liquid medium that will subsequently be used to culture bacteria?

Degerming is best described as

Which of the following is a mismatched pair?

Answer true or false to the reason given in the following statement: Oxidative reagents are very effective against infections of deep tissues,because they release hydroxyl radicals which kill anaerobic organisms.