1. The introductory passage describes an exciting new insight into a possible me
ID: 195845 • Letter: 1
Question
1. The introductory passage describes an exciting new insight into a possible mechanism of antibiotic resistance. What are some other mechanisms of antibiotic resistance discussed in the chapter? Select all correct answers. Select all correct answers.
A.The bacteria modify the structure that would otherwise be affected by the drug.
B.The bacteria incorporate the drug into their cell wall.
C.The bacteria are able to modify the drug so it is not harmful to them.
D.The bacteria form biofilms without having explosive cell death.
E.The bacteria are able to metabolize the drug as a nutrient.
F.The bacteria remove the drug from the cell.
2.
Pseudomonas aeruginosa and Vibrio cholerae form biofilms. How do these biofilms compare? Drag the choices below to indicate whether each is a characteristic of P. aeruginosa biofilms, V. cholerae biofilms, or both.
Drag and drop the items into the appropriate bins.
View Available Hint(s)
High cell densities activate genes associated with biofilm formation.
Increased c-di-GMP levels triggers biofilm formation.
Involves quorum sensing.
Most biofilms are found in areas of high nutrient density.
Bin1-P. aeruginosa biofilms Bin 2-V. cholerae biofilms Bin-3 Both types of biofilms
High cell densities activate genes associated with biofilm formation.
Increased c-di-GMP levels triggers biofilm formation.
Involves quorum sensing.
Most biofilms are found in areas of high nutrient density.
Bin1-P. aeruginosa biofilms Bin 2-V. cholerae biofilms Bin-3 Both types of biofilms
Explanation / Answer
Antibiotic resistance in bacteria:
Antibiotics are antimicrobial drugs that kill the disease causing microorganisms.
Antibiotic resistance is the ability of bacteria to resist the effect of drug. It occurs when bacteria changes in some way that reduce the effect of drug. Bacteria continue to survive causing more harm.
Antibiotic resistance is caused by the following:
A) The bacteria modify the structure that would otherwise be affected by the drug.
C) The bacteria are able to modify the drug so it is not harmful to them.
D) The bacteria forms biofilms without having explosive cell death.
F) The bacteria remove the drug from the cell. Example: some bacteria use ATP to power pumps that shoot antibiotics out of the cell.
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