BI 234 CHAPTER 9&10 EXAM QUESTIONS WITH
COMPLETE SOLUTIONS VERIFIED
Sterilization
to kill or remove all microbes so there is nothing viable left
Aseptic
working with microbes without contamination;
Bactericidal
having the ability to kill bacteria; Eg. disinfectants, antiseptics, or antibiotics
Bacteriostatic
having the ability to prevent the growth of bacteria, or to keep them in the stationary
phase of growth
Action of Antimicrobial Agents:
Denaturing proteins
disrupting nucleic acids
cell wall breakdown
disrupting cell membrane
Thermal death point
Lowest temperature that kills all cells in 10 minutes
Decimal reduction time (D value)
Time required to kill 90% of the microbes in a sample
Phenols example
COMPLETE SOLUTIONS VERIFIED
Sterilization
to kill or remove all microbes so there is nothing viable left
Aseptic
working with microbes without contamination;
Bactericidal
having the ability to kill bacteria; Eg. disinfectants, antiseptics, or antibiotics
Bacteriostatic
having the ability to prevent the growth of bacteria, or to keep them in the stationary
phase of growth
Action of Antimicrobial Agents:
Denaturing proteins
disrupting nucleic acids
cell wall breakdown
disrupting cell membrane
Thermal death point
Lowest temperature that kills all cells in 10 minutes
Decimal reduction time (D value)
Time required to kill 90% of the microbes in a sample
Phenols example
