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BIO 250 FINAL EXAM 2026 100% PASS
ASSURED EXAMINATION SOLUTIONS
which of the following is used to sterilize
items that should not, or cannot, be exposed
to heat or water? - correct answer- ethylene
oxide
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 preparing a sterile solution
of the new medication? - correct answer-
filtration
Why are endospores used to measure the
effectiveness of autoclave sterilization? -
correct answer- endospores are very hard to
destroy
which of the following is an example of
pasteurization? - correct answer- heat is used
to kill potential pathogens in apple juice
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which is CORRECT regarding the rate of
microbial death? - correct answer- cells in a
culture die at a constant rate?
which of the following factors will influence
the action of antimicrobial agents? - correct
answer- - the number of microorganisms
-the type of microorganisms present
- temperature and ph
- mode and dosage of the agent
which of the following is NOT a target of
drugs that inhibit protein synthesis? -
correct answer- interference with alanine -
alanine bridges in tetrapeptide
an antibiotic is - correct answer- a naturally
occurring compound that kills microbes or
inhibits their growth
An antimicrobial that inhibits cell wall
synthesis will result in which of the
following? - correct answer- cells become more
susceptible to osmotic pressure
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which of the following is NOT an approach to
combat drug-resistant bacteria? - correct
answer- 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 - correct answer- inhibition of
nucleic acid synthesis
the mechanism of action of the antimicrobial
amphotericin B id - correct answer- disruption
of the cytoplasmic membrane
which of the following statements about drug
resistance is INCORRECT? - correct answer- it
is not found in gram-positive bacteria
drug-resistant populations of microbes arise
when - correct answer- exposure to drugs
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selectively kills sensitive cells, allowing
overgrowth of resistant cells
a compound is extracted from a microbial
culture and is modified in the laboratory for
use as an oral medication. This product would
be a - correct answer- semisynthetic
antimicrobial
Which group of synthetic antimicrobials act as
anti-metabolic drugs because they are
structural analogs of para-aminobenzoic acid
(PABA)? - correct answer- sulfonamides
which group of antimicrobials prevent the
formation of a peptide bond in protein
synthesis? - correct answer- chloramphenicol
microbes known as resident microbiota are -
correct answer- microorganisms that remain
with the person throughout most of their life
BIO 250 FINAL EXAM 2026 100% PASS
ASSURED EXAMINATION SOLUTIONS
which of the following is used to sterilize
items that should not, or cannot, be exposed
to heat or water? - correct answer- ethylene
oxide
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 preparing a sterile solution
of the new medication? - correct answer-
filtration
Why are endospores used to measure the
effectiveness of autoclave sterilization? -
correct answer- endospores are very hard to
destroy
which of the following is an example of
pasteurization? - correct answer- heat is used
to kill potential pathogens in apple juice
,2 | Page
which is CORRECT regarding the rate of
microbial death? - correct answer- cells in a
culture die at a constant rate?
which of the following factors will influence
the action of antimicrobial agents? - correct
answer- - the number of microorganisms
-the type of microorganisms present
- temperature and ph
- mode and dosage of the agent
which of the following is NOT a target of
drugs that inhibit protein synthesis? -
correct answer- interference with alanine -
alanine bridges in tetrapeptide
an antibiotic is - correct answer- a naturally
occurring compound that kills microbes or
inhibits their growth
An antimicrobial that inhibits cell wall
synthesis will result in which of the
following? - correct answer- cells become more
susceptible to osmotic pressure
,3 | Page
which of the following is NOT an approach to
combat drug-resistant bacteria? - correct
answer- 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 - correct answer- inhibition of
nucleic acid synthesis
the mechanism of action of the antimicrobial
amphotericin B id - correct answer- disruption
of the cytoplasmic membrane
which of the following statements about drug
resistance is INCORRECT? - correct answer- it
is not found in gram-positive bacteria
drug-resistant populations of microbes arise
when - correct answer- exposure to drugs
, 4 | Page
selectively kills sensitive cells, allowing
overgrowth of resistant cells
a compound is extracted from a microbial
culture and is modified in the laboratory for
use as an oral medication. This product would
be a - correct answer- semisynthetic
antimicrobial
Which group of synthetic antimicrobials act as
anti-metabolic drugs because they are
structural analogs of para-aminobenzoic acid
(PABA)? - correct answer- sulfonamides
which group of antimicrobials prevent the
formation of a peptide bond in protein
synthesis? - correct answer- chloramphenicol
microbes known as resident microbiota are -
correct answer- microorganisms that remain
with the person throughout most of their life
