Thus, one thing this experiment may show you is whether there are any obvious differences in the ways that antibacterials affect a Gram positive vs. a Gram negative organism. Antibacterials also include substances like the enzyme lysozyme, made by many eukaryotic cells. Antiseptics are chemical substances that inhibit bacterial growth but are not normally harmful to human tissues. Thus, they are typically used to prevent infection on exposed tissue surfaces.
Disinfectants are substances that also inhibit bacteria growth but are harsh to eukaryotic tissues.
Thus, they are typically used for cleaning non-living things. Antibiotics are substances that are produced by one type of microorganism and inhibit the growth of other microorganisms. In this exercise, you will test seven antibacterials of your choice. Divide and label each plate into four sections. Each will be used for one of the antibacterials or the water control.