Microbiology Final Exam 2022 Questions And Answers
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Course
Microbiology
Institution
Microbiology
What type of mutation alters the base, but not the amino acid being coded for?
a. point
b. nonsense
c. missense
d. back
e. silent Correct Ans:- e.
Base pairs in DNA are held together by __________ bonds.
a. sulfhydryl
b. polar covalent
c. nonpolar covalent
d. hydrogen
e. peptide Cor...
microbiology final exam 2022 questions and answers
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Microbiology Final Exam
What type of mutation alters the base, but not the amino acid being coded
for?
a. point
b. nonsense
c. missense
d. back
e. silent Correct Ans:- e.
Base pairs in DNA are held together by __________ bonds.
a. sulfhydryl
b. polar covalent
c. nonpolar covalent
d. hydrogen
e. peptide Correct Ans:- d.
If pathogen A is more resistant to an erythromycin disc on a Kirby-Bauer
plate compared to pathogen B, then pathogen A will have a(n) _____ zone of
inhibition compared to pathogen B.
a. equal
b. larger
c. smaller Correct Ans:- c.
Which is incorrect about purines?
a. are nitrogenous bases
b. always paired with a specific pyrimidine
c. only found in DNA, not in RNA
d. include adenine and guanine
e. found within nucleotides Correct Ans:- c.
In the viable plate count method, a measured sample of a culture is evenly
spread across an agar surface and incubated. Each _____ represents one
_____ from the sample.
a. cell; colony
b. colony; cell
c. cell; cell
d. species; colony
e. generation; cell Correct Ans:- b.
Place the following forms of radiation from the most penetrating to the least
penetrating:
a. gamma, cathode, X rays
b. cathode, gamma, X ray
,c. cathode, X ray, gamma
d. gamma, X rays, cathode
e. X ray, camma, cathode Correct Ans:- d.
Which of the following does not affect microbial nucleic acids?
a. ultraviolet light
b. X rays
c. ethylene dioxide
d. moist heat
e. formaldehyde Correct Ans:- d.
Filtration sterilization:
a. relies on gravity
b. removes toxins
c. uses heat and filtration
d. can remove viruses
e. leaves behind endospores Correct Ans:- d.
Replication of DNA beings at a/n ___________ rich area.
a. cytosine-guanine
b. adenine-cytosine
c. adenine-thymine
d. uracil-adenine
e. guanine-adenine Correct Ans:- c.
A clinical microbiologist makes serial dilutions of several antimicrobials in
broth, and then incubates each drug dilution with a standard amount of a
patient's isolated pathogen. What is this microbiologist setting up?
a. MIC test
b. E-test
c. therapeutic index (TI)
d. antibiogram
e. Kirby Bauer technique Correct Ans:- a.
A microorganism that does not have catalase or superoxide dismutase would
find it difficult to live in an environment with ____
A. carbon dioxide
B. temperatures above 37 degrees C
C. high acidity
D. Oxygen
E. High salt Correct Ans:- D
All of the following could find a location in or on body tissues suitable for
growth except:
a. anaerobes
b. facultative anaerboes
, c. mesophiles
d. psychrophiles
e. capnophiles Correct Ans:- d.
An ideal antimicrobial therapeutic drug exhibits all of the following
characteristics except ____________:
a. non-toxic to host
b. immediately broken down by host
c. easily administered
d. limited capacity to elicit resistance
e. non-allergenic Correct Ans:- b.
Bacteria living in a freshwater stream that are moved to salty seawater
would:
a. be in a hypotonic solution
b. gain water
c. become dehydrated due to the loss of water
d. be in an isotonic solution
e. not lose or gain water Correct Ans:- c.
Each nucleotide is composed of:
a. two phosphates, one nitrogenous base, and one sugar
b. one phosphate, one nitrogenous base, and one sugar
c. two phosphates, one nitrogenous base, and one sugar
d. two phosphates, one nitrogenous base, and two sugars Correct Ans:- b.
Each of the following results in drug resistance except a drug ____________.
a. being inactivated
b. being pumped out of the cell
c. binding site being altered
d. being used as a nutrient by the cell Correct Ans:- d.
Surfactants work by
A. Coating the organism preventing interaction with its environment
B. Blocking transport into the organism
C. Blocking transport out from the organism
D. Disrupting membrane integrity Correct Ans:- d.
Which of the following is not true of conjugation?
A. involves direct contact between cells
B. transfers genes for enzymes and adherence molecules
C. involves the action of bacteriophage
D. transfers genes for drug resistance
E. the donor retains a copy of he transferred genes Correct Ans:- C
Aerobic respiration is an example of _____________?
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