[Campbell Biology P.638] What does Figure 27.23 indicate about the effectiveness of malacidi... | Practice Question

What does Figure 27.23 indicate about the effectiveness of malacidin against MRSA?

  • A: Malacidin rapidly increases MRSA abundance.
  • B: Malacidin has no significant effect on MRSA abundance.
  • C: Malacidin rapidly reduces MRSA abundance to near zero within 24 hours.
  • D: Malacidin's effectiveness is similar to the control group over 72 hours.

Explanation

Figure 27.23 clearly shows that the "Treatment with malacidin" line blue drops from an initial log scale abundance of approximately 2.5 to 0 within 24 hours, indicating a rapid and complete clearance of MRSA. The control group red line shows an increase in MRSA abundance.