1
(VERIFIED)
MICROBIOLOGY EXAM3 RIO SALADO| SET OF QUESTIONS
AND ACCURATE ANSWERS ALREADY GRADED A+
GUARANTEED SUCCESS
Which of the following would be used to sterilize glassware that will be used in a microbiology
lab?
Autoclave
Which of the following keeps most potential pathogens from taking up residence in the body?
innate immunity
Which of the following distinguishes physical from chemical defenses?
Physical defenses keep microbes out, and chemical defenses eliminate microbes.
Which of the following would be low in a person undergoing chemotherapy and at risk for
infection?
leukocytes
Antibiotics such as Streptomycin and Erythromycin stop bacterial infections because they
prevent the bacterial cell from doing which of the following?
Assembling polypeptides
Which of the following is a difference between penicillin and a vancomycin?
Penicillin interferes with an enzyme involved in cell wall synthesis, whereas vancomycin does
not
Semisynthetic antibiotics differ from natural antibiotics because of which of the following?
Natural antibiotics are derived from nature
Which of the following is the difference between soaps and quats?
Quats can kill microbes
Why should meat be thawed in the refrigerator?
it will decrease the possibility of bacteria growth as it thaws
Antibiotic "A" and antibiotic "B" are both effective at suppressing an infection in a patient,
however together, they have an even more significant effect. This is due to which of the
following?
Synergistic interactions
, 2
(VERIFIED)
Using a narrow-spectrum antibiotic is better than a broad-spectrum antibiotic because of which
of the following?
Narrow-spectrum antibiotics will have less of a chance of killing normal microbiota
A person is hiking and runs out of drinking water. They find a stream and decide to use the
chlorine tablets they brought to sanitize the water. This would be a good way to make the water
safe to drink because of which of the following?
The chlorine will break up the molecules of the microbes in the water
When a phlebotomist cleans an area of the skin with alcohol before drawing blood on a patient,
their goal is to do which of the following?
Lower the number of bacteria on the skin
Why is washing your hands with (non-antibacterial) soap and water an effective way to reduce
bacteria?
It is degerming your hands
Which of the following would target Mycobacterium tuberculosis?
Isoniazid
Mouthwash, antibacterial soap, and Lysol are all related because of which of the following?
They contain phenolic compounds
Which of the following would be the least selectively toxic treatment for a bacterial infection?
Polymyxin B
Which of the following would be used to control microbial counts in a liquid that could not be
exposed to heat?
Filtration
Which scientist's research showed penicillin was an effective antibiotic in treating infections in
animals?
Chain
what microbes can be pathogenic?
protozoa, fungi, bacteria, helminths, viruses
what are most infections caused by?
bacteria or viruses
is illness the same as disease
no
, 3
(VERIFIED)
what does infection mean?
infection means that. person has been colonized with a microbial population
most bacteria that cause disease in humans are ___
mesophilic
what control microbial growth?
Heat
What is the difference between commercial sterilization and sterilization using a sterilant?
A sterilant would be used on a surface
Polymyxin E is useful against gram-negative bacteria because of which of the following?
It breaks down the outer membrane
Which test can determine if a disinfectant is contaminated?
In-use test
Dry heat and moist heat differ because of which of the following?
Moist heat penetrates cells more effectively
how does heat affect cells?
denaturation of proteins
kill means
complete death of a microbe
bactericidal
indicated that bacterial population is dead
bacteriostatic
this means the population is low and not increasing in size
sterilzation
completely kill everything which is not always necessary
sanitize
reduce the population to food safe levels
cooking food can ____
, 4
(VERIFIED)
kill most bacteria that will cause infection
S. aureus
can replicate and produce toxins that will remain after the food Is heated if the toxin is in/on the
food prior to cooking
Clostridium botulinum
toxin that can be ingested and cause sever disease
remains dormant until activated
toxins will cause paralysis of muscles, including muscles that control breathing
pasteruization
reducing microbial counts in milk because sterilization would denature all proteins in milk,
reducing its nutritional value
required to be refrigerated after and can go bad bc bacteria may be present after the process
freezing
a way of food preservation and can be accompanied by other physical and chemical methods of
control
how does adding salt and sugar help with freezing items
it creates a hypertonic environment that suppresses the growth of organisms that are not
halophiles
nitrites
used as a preservative in deli meats, can be carcinogenic
autoclave
uses steam, pressure, and high temperature to sterilization items
gets to the temperature of 121 C or 250 F
only takes 15 minutes
antiseptic
(VERIFIED)
MICROBIOLOGY EXAM3 RIO SALADO| SET OF QUESTIONS
AND ACCURATE ANSWERS ALREADY GRADED A+
GUARANTEED SUCCESS
Which of the following would be used to sterilize glassware that will be used in a microbiology
lab?
Autoclave
Which of the following keeps most potential pathogens from taking up residence in the body?
innate immunity
Which of the following distinguishes physical from chemical defenses?
Physical defenses keep microbes out, and chemical defenses eliminate microbes.
Which of the following would be low in a person undergoing chemotherapy and at risk for
infection?
leukocytes
Antibiotics such as Streptomycin and Erythromycin stop bacterial infections because they
prevent the bacterial cell from doing which of the following?
Assembling polypeptides
Which of the following is a difference between penicillin and a vancomycin?
Penicillin interferes with an enzyme involved in cell wall synthesis, whereas vancomycin does
not
Semisynthetic antibiotics differ from natural antibiotics because of which of the following?
Natural antibiotics are derived from nature
Which of the following is the difference between soaps and quats?
Quats can kill microbes
Why should meat be thawed in the refrigerator?
it will decrease the possibility of bacteria growth as it thaws
Antibiotic "A" and antibiotic "B" are both effective at suppressing an infection in a patient,
however together, they have an even more significant effect. This is due to which of the
following?
Synergistic interactions
, 2
(VERIFIED)
Using a narrow-spectrum antibiotic is better than a broad-spectrum antibiotic because of which
of the following?
Narrow-spectrum antibiotics will have less of a chance of killing normal microbiota
A person is hiking and runs out of drinking water. They find a stream and decide to use the
chlorine tablets they brought to sanitize the water. This would be a good way to make the water
safe to drink because of which of the following?
The chlorine will break up the molecules of the microbes in the water
When a phlebotomist cleans an area of the skin with alcohol before drawing blood on a patient,
their goal is to do which of the following?
Lower the number of bacteria on the skin
Why is washing your hands with (non-antibacterial) soap and water an effective way to reduce
bacteria?
It is degerming your hands
Which of the following would target Mycobacterium tuberculosis?
Isoniazid
Mouthwash, antibacterial soap, and Lysol are all related because of which of the following?
They contain phenolic compounds
Which of the following would be the least selectively toxic treatment for a bacterial infection?
Polymyxin B
Which of the following would be used to control microbial counts in a liquid that could not be
exposed to heat?
Filtration
Which scientist's research showed penicillin was an effective antibiotic in treating infections in
animals?
Chain
what microbes can be pathogenic?
protozoa, fungi, bacteria, helminths, viruses
what are most infections caused by?
bacteria or viruses
is illness the same as disease
no
, 3
(VERIFIED)
what does infection mean?
infection means that. person has been colonized with a microbial population
most bacteria that cause disease in humans are ___
mesophilic
what control microbial growth?
Heat
What is the difference between commercial sterilization and sterilization using a sterilant?
A sterilant would be used on a surface
Polymyxin E is useful against gram-negative bacteria because of which of the following?
It breaks down the outer membrane
Which test can determine if a disinfectant is contaminated?
In-use test
Dry heat and moist heat differ because of which of the following?
Moist heat penetrates cells more effectively
how does heat affect cells?
denaturation of proteins
kill means
complete death of a microbe
bactericidal
indicated that bacterial population is dead
bacteriostatic
this means the population is low and not increasing in size
sterilzation
completely kill everything which is not always necessary
sanitize
reduce the population to food safe levels
cooking food can ____
, 4
(VERIFIED)
kill most bacteria that will cause infection
S. aureus
can replicate and produce toxins that will remain after the food Is heated if the toxin is in/on the
food prior to cooking
Clostridium botulinum
toxin that can be ingested and cause sever disease
remains dormant until activated
toxins will cause paralysis of muscles, including muscles that control breathing
pasteruization
reducing microbial counts in milk because sterilization would denature all proteins in milk,
reducing its nutritional value
required to be refrigerated after and can go bad bc bacteria may be present after the process
freezing
a way of food preservation and can be accompanied by other physical and chemical methods of
control
how does adding salt and sugar help with freezing items
it creates a hypertonic environment that suppresses the growth of organisms that are not
halophiles
nitrites
used as a preservative in deli meats, can be carcinogenic
autoclave
uses steam, pressure, and high temperature to sterilization items
gets to the temperature of 121 C or 250 F
only takes 15 minutes
antiseptic
