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Biofilm Formation in Bacterial Organisms

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Biofilm Formation in Bacterial Organisms

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Questions and Answers

Bacterial organisms form a biofilm to

mate with other bacterial organisms of the same or different species

find a food source when nutrients are scarce

attach to a surface in an area where food is plentiful (correct)

claim territory and fight off competing organisms of a different species

When a microorganism is found in an environment below its minimum growth temperature,

growth stops because the cell membrane melts

the cell dies

growth slows but does not stop

growth slows or stops because enzymatic processes become sluggish (correct)

Which of the following statements regarding examples of chemotrophy is FALSE?

NAD plays an important role in chemotrophic metabolism

Glucose is reduced compound that freely donates electrons to NAD, a more oxidized compound

Glucose is an important chemotrophic carbon source

Glucose is an oxidized compound that freely donates electrons to NAD, a more reduced compound (correct)

Which of the following is NOT used for attachment in biofilm formation?

lipopolysaccharides Signup and view all the answers

A facultative organism might prefer aerobic respiration over fermentation when carbohydrates become scarce because it gets

more energy from aerobic respiration Signup and view all the answers

What type of disease transmission would be associated with pathogens that can form endospores?

Both direct and indirect Signup and view all the answers

Which of the following is NOT required for microorganisms to grow and divide?

Conjugation Signup and view all the answers

Which of the following is NOT necessary for endospore formation?

Exopolysaccharide formation Signup and view all the answers

Which of the following is true about MacConkey medium?

The plate is both selective and differential Signup and view all the answers

In the figure below, in which phase(s) do(es) the number of bacteria change exponentially?

2 and 4 Signup and view all the answers