Question

answer all please

21) Indicate whether nutrient broth is a selective or differential media by marking the appropriate box(es). If the medium is both selective and differential, mark both. If the medium is neither selective nor differential, check the "neither" box selective O differential O neither 22) Indicate whether phenol red dextrose agar is a selective or differential media by marking the appropriate box(es). If the medium is both selective and differential, mark both. If the medium is neither selective nor differential, check the "neither" box: selective differential neither 23) Indicate whether starch agar is a selective or differential media by marking the appropriate box(es). If the medium is both selective and differential, mark both. If the medium is neither selective nor differential, check the "neither" box: selective differential Oneither 24) Indicate whether triple sugar iron agar is a selective or differential media by marking the appropriate box(es). If the medium is both selective and differential, mark both. If the medium is neither selective nor differential, check the "neither" box: selective differential neither

Answer 1

21. The selective media is rthe media which allows the growth of particular microorganisms and inhibits the growth of other microorganisms. The differential media takes the advantage of the biochemical activity of the bacteria and leads to a visible change when particular bacterial strain is present. Nutrient broth is neither selective nor differential. It allows th gowth of any mircroorgansim.

The answer is C.