A scientist investigated the effect of three different antibiotics on three different types of bacteria, A, B and C. This is the method used. 1. Grow bacteria A on an agar plate. 2. Put three separate paper discs each containing one of the antibiotics (1, 2 and 3) onto the agar plate3. Put the agar plate into an incubator for 48 hours. 4. Repeat steps 1-3 for bacteria B and for bacteria C. Figure 1 shows the scientist’s results – 7024

One thought on “A scientist investigated the effect of three different antibiotics on three different types of bacteria, A, B and C. This is the method used. 1. Grow bacteria A on an agar plate. 2. Put three separate paper discs each containing one of the antibiotics (1, 2 and 3) onto the agar plate3. Put the agar plate into an incubator for 48 hours. 4. Repeat steps 1-3 for bacteria B and for bacteria C. Figure 1 shows the scientist’s results – 7024”

1. Qualitative :
   Antibiotic 3 works best on bacteria A.
   Antibiotic 1 works best on bacteria B.
   Antibiotic 2 works best on bacteria C.
   Antibiotic 1 is least effective on A.
   Antibiotic 3 is least effective on B and C.
   Quantitative:
   1 kills more of B and C than A.
   2 kills more of C than A or B.
   3 kills more of A than B and C.
   2 kills the same amount of A and B.
   2 and 3 kill similar amounts of B.
   C is resistant to 3.
   Only 2 worked well on all the bacteria.

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