Question
15 Physical agents for controlling microbial growth indude all the following except A) ultraviolet radiation. B) boiling water C HEPA filters D) pasteurization E hydrogen peroxde. 16. Which of the following microbial forms have the highest resistance to physical and chemical controls? A) naked viruses B) protozoan cysts O fungal spores D) bacterial endospores E yeast 17. The process that destroys or removes all microorganisms and microbial forms induding bacterial endospores is A) disinfection. B) sterilization C antisepsis D) sanitization. E degermation. 18. Broad-spectrum antibiotics inhibit the growth of most intestinal bacteria. Consequently assuming that nothing is done to counter the reduction of intestinal bacteria, a hospital patient who is receiving broad-spectrum antibiotics is most likely to become A) unable to fix carbon dioxide B) antibiotic resistant C unable to fix nitrogen D) unable to synthesize peptidoglycan. E) deficient in certain vitamins and nutrients.
Explanation / Answer
15: hydrogen peroxide.
this is a chemical method of sterilization and microbial control.
16: bacterial endospores
The primary function of most endospores is to ensure the survival of a bacterium through periods of environmental stress
17: sterilization
18: deficiency of certain vitamins and minerals
intestinal bacteria produce certain vitamin and its complexes, introduction of broad spectrum antibiotics inhibits the growth of these bacteria.