28. Which of the following is NOT a characteristic of biofilms that makes it res

Question

28. Which of the following is NOT a characteristic of biofilms that makes it resistant to disinfectants?

a. presence of an extracellular matrix

b. stress-induced physiology of surface cells

c. stress-induced physiology of cells deep in the biofilm

d. metabolic collaboration between multiple species

COMPLETION: Fill in the blank with the correct word.

________ is the process by which all living cells, spores, and viruses are destroyed on an object.

. ________ is the process of heating foods to a moderately high temperature long enough to kill most heat-resistant, non-spore-forming pathogens known.

The presence of ________ in the bacterial cell wall is one of the mechanisms of antibiotic selective toxicity.

Explanation / Answer

Answer:

(28) b

Surface cells in biofilms enjoy the essential nutrients and the cells are in all phases of growth. So, these cells are not exposed to physiological stress. In comparison, the bacteria inside the biofilm lack nutrients are are basically in dormant phase and under stress. So, stress induced physiology of the surface cells is not a characteristic of biofilm which makes it resistant to disinfectants.

Completion: Fill in the blanks

"Sterilization" is the process by which all living cells, spores, and viruses are destroyed on an object.

"Pateurization" is the process of heating foods to a moderately high temperature long enough to kill most heat-resistant, non-spore-forming pathogens known.

The presence of "peptidoglycan" in the bacterial cell wall is one of the mechanisms of antibiotic selective toxicity.

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.