Bisc 261 Test with Questions Solved with
100% Correct Answers
Sanitization - Answer The process of reducing the microbial population on an object
or environment to levels considered safe by public health authorities
Antiseptics - Answer Chemical agents applied to living tissue that prevents infection by
killing or inhibiting pathogen growth
Decimal reduction time - Answer The time required to kill 90% of microorganisms in a
sample under some specific conditions
Selective toxicity - Answer A chemical agent that kills or inhibits microbial growth
but has no or little damage to the infected host
Therapeutic index - Answer The ratio of the toxic dose to the therapeutic dose
Toxic dose - Answer The drug concentration at which the chemical agent becomes too
toxic for the infected host
Therapeutic dose - Answer The drug concentration required to effectively treat
a bacterial infection
Narrow-spectrum drugs - Answer Drugs that are effective against a limited variety of
pathogens
Broad-spectrum drugs - Answer Drugs that attract many different kinds of bacteria
100% Correct Answers
Sanitization - Answer The process of reducing the microbial population on an object
or environment to levels considered safe by public health authorities
Antiseptics - Answer Chemical agents applied to living tissue that prevents infection by
killing or inhibiting pathogen growth
Decimal reduction time - Answer The time required to kill 90% of microorganisms in a
sample under some specific conditions
Selective toxicity - Answer A chemical agent that kills or inhibits microbial growth
but has no or little damage to the infected host
Therapeutic index - Answer The ratio of the toxic dose to the therapeutic dose
Toxic dose - Answer The drug concentration at which the chemical agent becomes too
toxic for the infected host
Therapeutic dose - Answer The drug concentration required to effectively treat
a bacterial infection
Narrow-spectrum drugs - Answer Drugs that are effective against a limited variety of
pathogens
Broad-spectrum drugs - Answer Drugs that attract many different kinds of bacteria
