Microbiology Exam 3 - Rio Salado Exam With The Correct Answers Only.pdf

Microbiology Exam 3 - Rio Salado Exam With vv vv vv vv vv vv vv




The Correct Answers Only vv vv vv vv




Which method can be used for long-term storage? - CORRECT ANSWER✔✔lyophilization
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Which of the following is an antiseptic that may be inactivated by some skin bacteria? - CORRECT ANSWER✔
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✔Hydrogen peroxide vv




What is the premise behind pasteurization? - CORRECT ANSWER✔✔It makes products safer to consume.
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Which of the following would be used to sterilize glassware that will be used in a microbiology lab? - CORRECT
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ANSWER✔✔Autoclave
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Antibiotics such as Streptomycin and Erythromycin stop bacterial infections because they prevent the
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bacterial cell from doing which of the following? - CORRECT ANSWER✔✔Assembling polypeptides
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Which of the following is a difference between penicillin and a vancomycin? - CORRECT ANSWER✔✔
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Penicillin interferes with an enzyme involved in cell wall synthesis, whereas vancomycin does not
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Semisynthetic antibiotics differ from natural antibiotics because of which of the following? - CORRECT
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ANSWER✔✔Natural antibiotics are derived from nature
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Which of the following is the difference between soaps and quats? - CORRECT ANSWER✔✔Quats can kill
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microbes
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,Why should meat be thawed in the refrigerator? - CORRECT ANSWER✔✔it will decrease the possibility of
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bacteria growth as it thaws
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Antibiotic "A" and antibiotic "B" are both effective at suppressing an infection in a patient, however together,
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they have an even more significant effect. This is due to which of the following? - CORRECT ANSWER✔✔
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Synergistic interactions vv




What is the difference between commercial sterilization and sterilization using a sterilant? - CORRECT
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ANSWER✔✔A sterilant would be used on a surface
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Polymyxin E is useful against gram-negative bacteria because of which of the following? - CORRECT ANSWER
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✔✔It breaks down the outer membrane vv vv vv vv vv




Which test can determine if a disinfectant is contaminated? - CORRECT ANSWER✔✔In-use test
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Dry heat and moist heat differ because of which of the following? - CORRECT ANSWER✔✔Moist heat
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penetrates cells more effectively
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Using a narrow-spectrum antibiotic is better than a broad-spectrum antibiotic because of which of the
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following? - CORRECT ANSWER✔✔Narrow-spectrum antibiotics will have less of a chance of killing normal
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microbiota
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A person is hiking and runs out of drinking water. They find a stream and decide to use the chlorine tablets
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they brought to sanitize the water. This would be a good way to make the water safe to drink because of
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which of the following? - CORRECT ANSWER✔✔The chlorine will break up the molecules of the microbes in
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the water
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When a phlebotomist cleans an area of the skin with alcohol before drawing blood on a patient, their goal is to
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do which of the following? - CORRECT ANSWER✔✔Lower the number of bacteria on the skin
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,Why is washing your hands with (non-antibacterial) soap and water an effective way to reduce bacteria? -
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CORRECT ANSWER✔✔It is degerming your hands
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Which of the following would target Mycobacterium tuberculosis? - CORRECT ANSWER✔✔Isoniazid
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Mouthwash, antibacterial soap, and Lysol are all related because of which of the following? - CORRECT
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ANSWER✔✔They contain phenolic compounds
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Which of the following would be the least selectively toxic treatment for a bacterial infection? - CORRECT
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ANSWER✔✔Polymyxin B
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Which of the following would be used to control microbial counts in a liquid that could not be exposed to
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heat? - CORRECT ANSWER✔✔Filtration
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If a person has athlete's foot, the cream they use to treat it will suppress the mold enough for the immune
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defenses to rid the skin of the infection because of which of the following? - CORRECT ANSWER✔✔The
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cream is fungistatic
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Why can quinolones target bacterial replication? - CORRECT ANSWER✔✔Bacteria have different enzymes
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Which scientist's research showed penicillin was an effective antibiotic in treating infections in animals? -
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CORRECT ANSWER✔✔Chain
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what microbes can be pathogenic? - CORRECT ANSWER✔✔protozoa, fungi, bacteria, helminths, viruses
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what are most infections caused by? - CORRECT ANSWER✔✔bacteria or viruses
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, is illness the same as disease - CORRECT ANSWER✔✔no
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what does infection mean? - CORRECT ANSWER✔✔infection means that. person has been colonized with a
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microbial population
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most bacteria that cause disease in humans are ___ - CORRECT ANSWER✔✔mesophilic
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what control microbial growth? - CORRECT ANSWER✔✔heat
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how does heat affect cells? - CORRECT ANSWER✔✔denaturation of proteins
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the intensity depending on time, temp, and moisture
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kill means - CORRECT ANSWER✔✔complete death of a microbe
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bactericidal - CORRECT ANSWER✔✔indicated that bacterial population is dead
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bacteriostatic - CORRECT ANSWER✔✔this means the population is low and not increasing in sizevv vv vv vv vv vv vv vv vv vv vv vv vv




sterilzation - CORRECT ANSWER✔✔completely kill everything which is not always neccessary
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sanitize - CORRECT ANSWER✔✔reduce the population to food safe levels
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cooking food can ____ - CORRECT ANSWER✔✔kill most bacteria that will cause infection
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