Q 1. Pure cultures can easily be obtained on streak plates, even if the desired bacteria are present in very low concentrations in the initial culture broth. True/ False
Q 2. Which of the following is not a chemical requirement of all bacteria?
Q 3. A culture medium on which only gram-positive organisms grow and a yellow halo surrounds Staphyloccocus aureus colonies is called a(n)?
Q 4. In the figure below, which sections of the graph illustrate a logarithmic change in cell numbers?
Q 5. In the figure below, which section shows a growth phase where the number of cells dying equalsthe number of cells dividing?
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