MICROBIOLOGY A SYSTEMS APPROACH
COMPREHENSIVE EXAMINATION TEST
2026 FULL QUESTIONS AND CORRECT
ANSWERS
◉Some microbial control agents are able to _____ cell proteins by
breaking bonds that maintain the native state, the three-dimensional
configuration of the proteins.
A. denature
B. bind
C. dissolve
D. mutate. Answer: A. denature
◉Agents that can denature microbial proteins include all of the
following except
A. moist heat.
B. alcohol.
C. acids.
D. metallic ions.
,E. X rays.. Answer: E. X rays.
◉Which of the following does not affect microbial nucleic acids?
A. moist heat
B. ultraviolet light
C. X rays
D. ethylene dioxide
E. formaldehyde. Answer: A. moist heat
◉Physical agents for controlling microbial growth include all of the
following except
A. ultraviolet radiation.
B. boiling water.
C. HEPA filters.
D. pasteurization.
E. hydrogen peroxide.. Answer: E. hydrogen peroxide.
◉Sterilization is achieved by
A. flash pasteurization.
, B. hot water.
C. boiling water.
D. steam autoclave.
E. All of the choices are correct.. Answer: D. steam autoclave.
◉Dry heat
A. is less efficient than moist heat.
B. cannot sterilize.
C. includes tyndallization.
D. is used in devices called autoclaves.
E. will sterilize at 121° C for 15 minutes.. Answer: A. is less efficient
than moist heat.
◉The minimum sterilizing conditions in a steam autoclave are
A. 121°C at 15 psi for 15 minutes.
B. 63°C for 30 minutes.
C. 160°C for 2 hours.
D. 71.6°C for 15 seconds.
E. 100°C for 30 minutes.. Answer: A. 121°C at 15 psi for 15 minutes.
COMPREHENSIVE EXAMINATION TEST
2026 FULL QUESTIONS AND CORRECT
ANSWERS
◉Some microbial control agents are able to _____ cell proteins by
breaking bonds that maintain the native state, the three-dimensional
configuration of the proteins.
A. denature
B. bind
C. dissolve
D. mutate. Answer: A. denature
◉Agents that can denature microbial proteins include all of the
following except
A. moist heat.
B. alcohol.
C. acids.
D. metallic ions.
,E. X rays.. Answer: E. X rays.
◉Which of the following does not affect microbial nucleic acids?
A. moist heat
B. ultraviolet light
C. X rays
D. ethylene dioxide
E. formaldehyde. Answer: A. moist heat
◉Physical agents for controlling microbial growth include all of the
following except
A. ultraviolet radiation.
B. boiling water.
C. HEPA filters.
D. pasteurization.
E. hydrogen peroxide.. Answer: E. hydrogen peroxide.
◉Sterilization is achieved by
A. flash pasteurization.
, B. hot water.
C. boiling water.
D. steam autoclave.
E. All of the choices are correct.. Answer: D. steam autoclave.
◉Dry heat
A. is less efficient than moist heat.
B. cannot sterilize.
C. includes tyndallization.
D. is used in devices called autoclaves.
E. will sterilize at 121° C for 15 minutes.. Answer: A. is less efficient
than moist heat.
◉The minimum sterilizing conditions in a steam autoclave are
A. 121°C at 15 psi for 15 minutes.
B. 63°C for 30 minutes.
C. 160°C for 2 hours.
D. 71.6°C for 15 seconds.
E. 100°C for 30 minutes.. Answer: A. 121°C at 15 psi for 15 minutes.
