Module 1: Introduction to Biofilms
Intermediate Level Quiz
Multiple choice. Please select the "best" answer to the following questions.
Question 1. Microbial biofilms attached in flowing systems can be "beneficial" by:
Feedback
A)
reducing metal sulfides.
B)
removing organic compounds from the bulk fluid.
C)
becoming detached and transported through heating and ventilation systems.
D)
A and B above.
E)
A, B, and C above.
Question 2. Antimicrobial resistance in biofilms is higher than for the same bacterial cells in aqueous suspension because of:
Feedback
A)
higher substrate concentration gradients in the biofilm.
B)
rapid penetration of antimicrobials through biofilm.
C)
inadequate stress response in biofilm cells.
D)
lower accumulation of persister cells in the biofilm mode.
Question 3. Biofilms can be detrimental to human health and in engineered water systems because:
Feedback
A)
conversion of carbon to cell biomass can cause plugging in drinking water filtration systems.
B)
biofilms growing on surgical implants can cause serious infections.
C)
they can contribute to corrosion in industrial water systems.
D)
biofilms can cause respiratory infection if transported through ventilation systems and inhaled.
E)
all of the above.
F)
none of the above.
Question 4. The amount, spatial distributions, and morphology of a biofilm on a surface in a flowing aqueous system:
Feedback
A)
has little effect on the performance of industrial equipment.
B)
is influenced by substrate concentration and hydrodynamics.
C)
is highly variable and the cause-and-effect mechanisms well understood.
D)
has little medical significance.