Question

1 What is a dichotomous key (strategy) and how is it used to identify microorganisms

2 Why is the Gram stain

often used as the first step to identify an unknown (what information is derived from the Gram stain resu)?

3What bacterial aerotolerances produce a positive catalase resu.

4 How is catalase detected in the catalase test? (state the reagent used to detect catalase AND what observation indicates a positive resu

Science