in the meselson and stahl model, which of the following would rule out a dispersive replication model? 1. in the first generation, you see a single band of intermediate density 2. in the third generation, the dna is composed of mixed dna molecules, some of them intermediate density, most of them light 3. in the second generation, you have 1 band of intermediate density 4. in the first generation, you see 2 bands, a light one and a heavy one 5. both 2 and 4



Answer :

In the Meselson and Stahl model, the result that would rule out a dispersive replication model is:  2. in the third generation, the DNA is composed of mixed DNA molecules, some of them intermediate density, most of them light.

Dispersive model of of DNA replication suggests that replication will result in only intermediate DNA molecules after every cycle. This is a hybrid DNA with both old as well as new strand.

DNA is the genetic material in most of the living organisms. It is a double-stranded molecule with helical shape that have anti-parallel complementary strands. These strands are joined together by the hydrogen bonds between the nitrogenous bases.

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