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Bio 250 Final Exam Questions and Answers
(100% Correct Answers) Already Graded
A+
which of the following is used to sterilize items that should not, or
cannot, be exposed to heat or water? Ans: ethylene oxide
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A scientist develops a new medication that is a protein
compound and that must be administered by injection. Which of
the following would be the most effective and safest means of
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preparing a sterile solution of the new medication? Ans: filtration
Why are endospores used to measure the effectiveness of
autoclave sterilization? Ans: endospores are very hard to destroy
which of the following is an example of pasteurization? Ans: heat
is used to kill potential pathogens in apple juice
which is CORRECT regarding the rate of microbial death? Ans:
cells in a culture die at a constant rate?
which of the following factors will influence the action of
antimicrobial agents? Ans: - the number of microorganisms
-the type of microorganisms present
, 2
- temperature and ph
- mode and dosage of the agent
which of the following is NOT a target of drugs that inhibit protein
synthesis? Ans: interference with alanine - alanine bridges in
tetrapeptide
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an antibiotic is Ans: a naturally occurring compound that kills
microbes or inhibits their growth
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An antimicrobial that inhibits cell wall synthesis will result in which
of the following? Ans: cells become more susceptible to osmotic
pressure
which of the following is NOT an approach to combat drug-
resistant bacteria? Ans: flood a patients system with healthy
bacteria to quickly remove access to nutrients and starve the
pathogen
the mechanism of action of the antibiotic rifampin (used to treat
tuberculosis infections) is Ans: inhibition of nucleic acid synthesis
the mechanism of action of the antimicrobial amphotericin B id
Ans: disruption of the cytoplasmic membrane
, 3
which of the following statements about drug resistance is
INCORRECT? Ans: it is not found in gram-positive bacteria
drug-resistant populations of microbes arise when Ans: exposure
to drugs selectively kills sensitive cells, allowing overgrowth of
resistant cells
a compound is extracted from a microbial culture and is modified
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in the laboratory for use as an oral medication. This product would
be a Ans: semisynthetic antimicrobial
Which group of synthetic antimicrobials act as anti-metabolic
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drugs because they are structural analogs of para-aminobenzoic
acid (PABA)? Ans: sulfonamides
which group of antimicrobials prevent the formation of a peptide
bond in protein synthesis? Ans: chloramphenicol
microbes known as resident microbiota are Ans: microorganisms
that remain with the person throughout most of their life
Biological transmission differs from mechanical transmission in that
biological transmission Ans: involves reproduction of a pathogen
in an arthropod vector prior to transmission
the incidence (new cases) of scarlet fever in the year 2000 in the
United States was 12.43/100,000 cases. This means Ans: there were
Bio 250 Final Exam Questions and Answers
(100% Correct Answers) Already Graded
A+
which of the following is used to sterilize items that should not, or
cannot, be exposed to heat or water? Ans: ethylene oxide
© 2025 Assignment Expert
A scientist develops a new medication that is a protein
compound and that must be administered by injection. Which of
the following would be the most effective and safest means of
Guru01 - Stuvia
preparing a sterile solution of the new medication? Ans: filtration
Why are endospores used to measure the effectiveness of
autoclave sterilization? Ans: endospores are very hard to destroy
which of the following is an example of pasteurization? Ans: heat
is used to kill potential pathogens in apple juice
which is CORRECT regarding the rate of microbial death? Ans:
cells in a culture die at a constant rate?
which of the following factors will influence the action of
antimicrobial agents? Ans: - the number of microorganisms
-the type of microorganisms present
, 2
- temperature and ph
- mode and dosage of the agent
which of the following is NOT a target of drugs that inhibit protein
synthesis? Ans: interference with alanine - alanine bridges in
tetrapeptide
© 2025 Assignment Expert
an antibiotic is Ans: a naturally occurring compound that kills
microbes or inhibits their growth
Guru01 - Stuvia
An antimicrobial that inhibits cell wall synthesis will result in which
of the following? Ans: cells become more susceptible to osmotic
pressure
which of the following is NOT an approach to combat drug-
resistant bacteria? Ans: flood a patients system with healthy
bacteria to quickly remove access to nutrients and starve the
pathogen
the mechanism of action of the antibiotic rifampin (used to treat
tuberculosis infections) is Ans: inhibition of nucleic acid synthesis
the mechanism of action of the antimicrobial amphotericin B id
Ans: disruption of the cytoplasmic membrane
, 3
which of the following statements about drug resistance is
INCORRECT? Ans: it is not found in gram-positive bacteria
drug-resistant populations of microbes arise when Ans: exposure
to drugs selectively kills sensitive cells, allowing overgrowth of
resistant cells
a compound is extracted from a microbial culture and is modified
© 2025 Assignment Expert
in the laboratory for use as an oral medication. This product would
be a Ans: semisynthetic antimicrobial
Which group of synthetic antimicrobials act as anti-metabolic
Guru01 - Stuvia
drugs because they are structural analogs of para-aminobenzoic
acid (PABA)? Ans: sulfonamides
which group of antimicrobials prevent the formation of a peptide
bond in protein synthesis? Ans: chloramphenicol
microbes known as resident microbiota are Ans: microorganisms
that remain with the person throughout most of their life
Biological transmission differs from mechanical transmission in that
biological transmission Ans: involves reproduction of a pathogen
in an arthropod vector prior to transmission
the incidence (new cases) of scarlet fever in the year 2000 in the
United States was 12.43/100,000 cases. This means Ans: there were
