Q. Which of the following define Biofilms?
Answer: accumulations of microorganisms at surfaces such as those of a rock, a tooth or an oil droplet
Notes: A biofilm comprises any syntrophic consortium of microorganisms in which cells stick to each other and often also to a surface. These adherent cells become embedded within a slimy extracellular matrix that is composed of extracellular polymeric substances. Microorganisms that form biofilms include bacteria, fungi and protists. One common example of a biofilm dental plaque, a slimy buildup of bacteria that forms on the surfaces of teeth.

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