Which one of the following is most resistant to chemical biocides?

Which one of the following is most resistant to chemical biocides? 

A) gram-negative bacteria
B) gram-positive bacteria
C) mycobacteria
D) protozoan cysts
E) viruses with lipid envelopes


Answer: a

Bone and tendons for transplant are decontaminated by

Bone and tendons for transplant are decontaminated by 

A) ethylene oxide.
B) glutaraldehyde.
C) peroxygens.
D) plasma sterilization.
E) supercritical fluids.


Answer: e

If you were preparing nutrient agar at home and did not have an autoclave, what could you use to sterilize the nutrient agar?

If you were preparing nutrient agar at home and did not have an autoclave, what could you use to sterilize the nutrient agar?

A) bleach
B) boiling for one hour
C) hydrogen peroxide
D) oven at 121°C for one hour
E) pressure cooker at 121°C for 15 minutes


Answer: e

The preservation of beef jerky from microbial growth relies on which method of microbial control?

The preservation of beef jerky from microbial growth relies on which method of microbial control?

A) filtration
B) lyophilization
C) desiccation
D) ionizing radiation
E) supercritical CO2


Answer: c