Question

Using imprints from a culture plate having bacterial colonies, you can select, streptomycin resistant mutants and prove that such mutations do not originate as adaptation. The imprints need to be inoculated on

• A. Plates with and without streptomycin
• B. Plates with minimal medium
• C. Plates with streptomycin
• D. Plates without streptomycin

Answer 1

The correct option is C Plates with streptomycin

Adaptation is a trait of an organism related to a current functional role in its lifecycle. Further, mutations which are heritable change in the nucleotide sequence of DNA while they bring about genotypic change, may not have phenotypic consequences. To prove that resistant mutants are unable to spontaneously show clonal appearance, the imprints need to be inoculated on culture plate with streptomycin.

Thus, the correct answer is option C.