Quinones and related antibiotics are

  1. The immediate source of the flat sour bacteria is usually the

    A. plant equipment
    B. sugar
    C. starch
    D. soil

  2. Quinones and related antibiotics are

    A. tetracyclines
    B. actinorhodin
    C. mitomycin
    D. all of these

  3. Changes in which of the following characterizes mutations?

    A. Phenotype
    B. Genotype
    C. Both (a) and (b)
    D. None of these