Microbial Communities

Question 1

Symbiosis

Answer 1

e. g. bioluminexcent V. fischeri and Bobtail Squid

- Selective colonisation

Question 2

Parisitism

Answer 2

Relationship where one organism benefits and the other suffers

Question 3

Mutualism

Answer 3

Mutually beneficial relationship between organisms

Question 4

Commensalism

Answer 4

One organism benefits, the other neither benefits nor suffers

Question 5

Biofilms

Answer 5

1. Attachment - suppression of motility factors, induction of adhesion factors
2. Growth - intercellular interaction, quorum sensing
   Biofilm maturation - induced extracellular polysaccharides (matrix) synthesis, phenotypic diversity
3. Detachment - Quorum sensing, induction of disassembly factors

Question 6

Quorum Sensing

Answer 6

AHL = Acyl-homoserine lactone