NEET Biology 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 streptomycinCorrect
(B)On plates with minimal medium
(C)Only on plates without streptomycin
(D)On plates with and without streptomycin

Answer: (A)

Solution

In the replica-plating technique, imprints of the master colonies are pressed onto plates containing streptomycin so that only the pre-existing resistant colonies grow and can be identified by their position; those same colonies can then be recovered from the original (unexposed) master plate, proving that resistance

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Question ID VK-119806