Question

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. Answer these questions regarding the biofilm.

1) Describe four steps of the life cycle of biofilms.

2) List at least three advantages of biofilms in terms of the residents in biofilms.

Answer 1

1- The four steps of biofilm life cycle are -

A- Attachment - interaction between micro organism and implant

B- Accumulation - interaction between bacterial cells.

C- Maturation - Formation of viable 3D structure or biofilm.

D- Dispersal / Detachment - release from biofilm.

2- Advantages-

A- Micro organisms living in community can share nutrients between each other

B- due to protective role of extracellular matrix , biofilm provide protection to micro organisms.

C- due to living in community , biofilm act as metabolite exchange platform.