Question

Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant mutants and prove that such mutations do not originate as adaptation. These imprints need to be used

• A. Only on plates with streptomycin
• B. On plates with minimal medium
• C. Only on plates without streptomycin
• D. On plates with and without streptomycin

Answer 1

The correct option is A Only on plates with streptomycin

Plates having streptomycin allow to propagate only those bacteria which are resistant to the antibiotic.

So, the correct answer is 'Only on plates with streptomycin'.