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(a) What did Meselson and Stahl observe when : (i) They cultured E. coli in a medium containing `""^(15)NH_(4)Cl` for a few generations and centrifuged the content (ii) They transferred one such bacterium to the normal medium of `NH_(4)CI` and cultured for 2 generations (iii) What did Meselson and Stahl conclude from this experiment ? Explain with the help of diagram. (iv) Which is the first genetic material ? Give reasons in support of your answer. |
| Answer» Correct Answer - (i), (ii) and (iii) | |