You mix Met⁺ Pro⁻ Lys⁻,Met⁻,Pro⁻ Lys⁺ and Met⁻ Pro⁺ Lys⁻ auxotrophic strains of E.coli.After incubation time has passed,you place 10²⁰ cells per plate on agar to detect potential prototrophic colonies.How many plates need to be screened if gene transfer takes place only through random mutation?

Question

Quizplus · Accepted Answer

The correct answer is A because the probability of a random mutation is very low, so only a few plates need to be screened to detect potential prototrophic colonies.

You Mix Met⁺ Pro⁻ Lys⁻,Met⁻,Pro⁻ Lys⁺ and Met⁻ Pro⁺ Lys⁻