MCB 100 EXAM 4 iClicker Study Questions and Correct Answers
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Course
MCB 100
Institution
MCB 100
When microbial control methods are used, microbes are destroyed at a constant rate; there is no instantaneous death of all the microbes present. That microbial death rate is influenced by all of the following factors EXCEPT __________. the toxins and metabolites produced by the bacteria
Determine ...
MCB 100 EXAM 4 iClicker Study
Questions and Correct Answers
When microbial control methods are used, microbes are destroyed at a constant rate;
there is no instantaneous death of all the microbes present. That microbial death rate is
influenced by all of the following factors EXCEPT __________. ✅the toxins and
metabolites produced by the bacteria
Determine which of the following statements is true or false and then select the correct
answer sequence
-the term antimicrobial agents includes antibiotics, fungicidal and anti-parasitic agents
-Bacteriostatic agents inhibit bacterial growth, but do not necessarily kill the organisms
against which they are directed
-agents that inhibit bacterial cell wall biosynthesis can be bactericidal
-Antiseptics are sufficiently nontoxic that they can be applied to skin ✅true, true, true,
true
Moist hear kills microbes faster than dry heating because: ✅Moist heat kills microbes
by denaturing protein and nucleic acid structures and disrupting cell membranes, which
takes less time to kill cells than removing water by dry heat and killing cells through
oxidation reactions
An autoclave is able to achieve temperatures higher than that of boiling water ____
✅by increasing the pressure
Which of the following statements about pasteurization is not true? ✅Pasteurization is
a method of sterilization that kills microbes present in food
Beta-lactam-containing antibiotics ✅are modified by most of their gene resistence
For each of the following antibiotic response plots, match the appropriate description
✅A=1
B=2
C=3
Which TWO of the following choices best explain why the gut pathogen Clostridium
difficile is a problem in hospitals with patients taking antibiotics, when if the bacteria are
only a little resistant to antibiotics ✅-the C. difficile bacteria can persist and overgrow in
the gut once most of the resident bacteria are gone die to antibiotic treatment
-
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