Which of the Following is an Example of a Biofilm

Question

Which of the following is an example of a biofilm?
A) transient skin microbes
B) dental plaque
C) marine diatoms
D) a planktonic microcolony

Accepted Answer

Dental plaque is an example of a biofilm, as it is a community of microorganisms that adhere to a surface and produce extracellular polymeric substances to form a complex structure. Transient skin microbes and a planktonic microcolony do not form biofilms, and marine diatoms are not considered microbial biofilms, despite living in communities.