MCB2004 Microbiology: Angela Muchovej Exam 4 Test Questions and Actual Detailed Answers Edition.

The destruction of pathogenic nonsporulating microbes or their toxins, usually on inanimate surfaces is called: - Answer disinfection Forms of radiant energy consisting of short-wave electromagnetic or high-speed electrons that cause dislodgment of electrons on target molecules and create ions are called: - Answer ionizing radiation Heat treatment of perishable fluids to destroy heat-sensitive vegetative cells, followed by rapid chilling to inhibit growth of survivors and germination of spores is: - Answer pasteurization The process of heating under steam pressure, in order to kill microorganisms: - Answer autoclaving Drugs that are selective and limited in their effects are called: - Answer narrow spectrum A group of related chemicals, called halogens, with antimicrobial application often used in disinfectants and antiseptics do not include which of the following? - Answer lead The thermal death time is the lowest temperature required to kill all cells of a culture in a given quantity of broth culture upon a 10-minute exposure - Answer False The area that shows no bacterial growth around an antimicrobial agent in the disk-diffusion test: - Answer zone of inhibition The action of two or more drugs or microbes that results in a heightened response or greater activity is: - Answer synergism A chemotherapeutic agent manufactured entirely through chemical processes in the laboratory is: - Answer synthetic Microorganisms that colonize the surface of the human body without normally causing disease: - Answer resident microbiota