aceptic techniques

Question 1

Give two reasons why it would be important to use sterile techniques during this investigation.

Answer 1

To prevent contamination of apparatus with other microorganisms / bacteria;
To prevent personal contact with bacteria;
To prevent release of bacteria into air;

Question 2

The antibiotic reached the bacteria by diffusion. Suggest why an effective antibiotic may produce only a small clear zone.

Answer 2

Diffuses slowly;