Questions: Which of the following are examples of biofilms? Check All That Apply Dental plaque Scum accumulating in toilet bowls Slipperiness on rocks in stream beds Capsule formation around Streptococcus pneumoniae Furry grayish-white growth on old bread or fruit

Which of the following are examples of biofilms? Check All That Apply Dental plaque Scum accumulating in toilet bowls Slipperiness on rocks in stream beds Capsule formation around Streptococcus pneumoniae Furry grayish-white growth on old bread or fruit
Transcript text: Which of the following are examples of biofilms? Check All That Apply Dental plaque Scum accumulating in toilet bowls Slipperiness on rocks in stream beds Capsule formation around Streptococcus pneumoniae Furry grayish-white growth on old bread or fruit
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Solution

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The examples of biofilms are:

  • Dental plaque
  • Scum accumulating in toilet bowls
  • Slipperiness on rocks in stream beds

Explanation:

  1. Dental plaque: This is a well-known example of a biofilm. It is a sticky, colorless or pale yellow film that forms on your teeth. It contains bacteria that can lead to tooth decay and gum disease.

  2. Scum accumulating in toilet bowls: This is another example of a biofilm. It consists of bacteria and other microorganisms that adhere to surfaces in moist environments, forming a slimy layer.

  3. Slipperiness on rocks in stream beds: This slipperiness is due to biofilms formed by algae, bacteria, and other microorganisms that attach to the surfaces of rocks in aquatic environments.

The other options are not examples of biofilms:

  • Capsule formation around Streptococcus pneumoniae: This refers to a protective layer around individual bacterial cells, not a biofilm.
  • Furry grayish-white growth on old bread or fruit: This is typically mold, which is a type of fungus, not a biofilm.

In summary, the correct examples of biofilms are dental plaque, scum accumulating in toilet bowls, and slipperiness on rocks in stream beds.

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