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To study the effect of an antibiotic on three strains of bacteria (A, B, C), agar plates were set up as shown - HSC - SSCE Biology - Question 27 - 2004 - Paper 1
Question 27
To study the effect of an antibiotic on three strains of bacteria (A, B, C), agar plates were set up as shown. Agar plate 1 | Agar plate 2 | Agar plate 3 Surface c... show full transcript
Worked Solution & Example Answer:To study the effect of an antibiotic on three strains of bacteria (A, B, C), agar plates were set up as shown - HSC - SSCE Biology - Question 27 - 2004 - Paper 1
Step 1
Write a conclusion to the experiment.
Answer
The results indicate that the antibiotic X was effective against bacterium A, as evidenced by the clear zone around the disc on agar plate 1. In contrast, there was little to no effect on bacterium B as shown on agar plate 2, and no inhibition observed for bacterium C on agar plate 3. This suggests that bacterium A is susceptible to the antibiotic, while bacteria B and C are resistant.
Step 2
Identify ONE safe work practice used to minimise risks associated with handling or identifying microbes.
Answer
One safe work practice is to wear appropriate personal protective equipment (PPE), such as gloves and a lab coat, to prevent direct contact with the bacteria and reduce the risk of contamination or infection.