Biofilms Quiz

Free living bacterial cells are said to be.....

• Planktonic

• Ascribed

• Sessile

• Liberated

Biofilm formation begins with .....

• Cells maturing

• Free-floating cells attaching to a surface

• Extracellular polymeric substances

• A sugary matrix

.....is the ability of organisms to degrade hazardous waste

• Reproduction

• Biofilm

• Microbial

• Bioremediation

Which structure is not a component of all cells?

• cell wall
• cell membrane
• genetic material
• ribosomes

Which stain is used to distinguish between differences between the cell walls of medically important bacteria?

• simple stain
• acridine orange stain
• gram stain
• negative stain

What is responsible for the accumulation of biofilm on the surface of teeth?

• Plants

• Fungi

• Viruses

• Bacteria

What is quorum sensing?

• communication between bacteria of the same species

• communication that informs bacteria of how many they are of their species and/or how many there are of other bacterial species

• communication that allows a species of bacteria to launch a particular behavior together

• All of the above

What role do biofilms NOT play?

please choose the incorrect statement:

• A biofilm can play a role in preventing phagocytosis

• A biofilm helps prevent bacteria from attaching to any one specific surface

• Biofilms can make many antibiotics less effective

• Biofilms protects bacteria from chemical disinfectants

Which of the following statements about biofilms is/are true

• In a single species biofilm, the interior environment is uniform throughout.

• The environment of the biofilm matrix is not conducive to gene transfer

• In biofilms there is often metabolic cooperation

• Biofilms can often continue to grow at low nutrient concentrations.

Pathogen would most accurately be described as

• parasite
• commensal 
• saprobe
• symbiont