1. What are biofilms? a. Thin layers of bacteria that are identically replicated

Question

1. What are biofilms?

a. Thin layers of bacteria that are identically replicated.

b. complex arrangements of bacteria that appear to "sense" other cells and regulate their genes for a common purpose

c. complex arrangements of bacteria that appear to sense other cells and regulate their genes to gain a competitive advantage

d. deposits of waste material left behind from the decay of complex arrangements of bacter

2. Acyl homoserine lactones that are secreted by prokaryotes into the medium to regulate the transcription of genes in other cells are called

a. attenuators

b. inhibitors

c. autoinducers.

d. operators.

3. If glucose is scarce, but lactose is available, the lac operon will act to increase the levels of these proteins.

a. galactosidepermease and allolactose

b. inducer and galactosidetransacetylase

c. -galactosidase and galactosidepermease

d. -galactosidase and inducer

Explanation / Answer

1) d- biofilms are deposits of waste material left behind from the decay of complex arrangements of bactera.

2) Acyl homoserine lactones that are secreted by prokaryotes into the medium to regulate the transcription of genes in other cells are called - autoinducers.

3)  If glucose is scarce, but lactose is available, the lac operon will act to increase the levels of these proteins - -galactosidase and inducer

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