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When does S. pneumoniae becomes competent for transformation?(a) Lag phase(b) Log phase(c) Exponential phase(d) Stationery phaseI had been asked this question during an online exam.The query is from Genetic Recombination topic in section Genetic Recombination of Drug Biotechnology

Answer»

Correct answer is (c) EXPONENTIAL phase

Best explanation: For transformation to OCCUR every cell has to be competent. Competency is dependent on several conditions. BACTERIA need to be on certain stage of growth such as S pneumoniae will be competent only on the exponential phase. When the population will be REACHING 107 to 108 CELLS per ml.



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