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What will be the ratio N15:N15/N14:N14/N14 containing DNA's if Meselson and stahl experiment is continued for four generations in E.coli ?
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What will be the ratio N15:N15/N14:N14/N14 containing DNA's if Meselso...
Continuation of Meselson and Stahl Experiment in E. coli
Meselson and Stahl's experiment demonstrated the semi-conservative replication of DNA. If this experiment is continued for four generations in E. coli, the ratio of N15:N15/N14:N14/N14 containing DNA's would be as follows:

First Generation:
- In the first generation, after one round of replication, the DNA would consist of equal parts of N15/N14 and N14/N14 DNA. The ratio would be 1:1 for N15/N14 and 2:2 for N14/N14 DNA.

Second Generation:
- In the second generation, after another round of replication, the DNA would consist of varying proportions of N15/N14 and N14/N14 DNA. The ratio would be 1:3 for N15/N14 and 2:2:2 for N14/N14 DNA.

Third Generation:
- In the third generation, the DNA would continue to replicate, leading to a further shift in the ratio of N15/N14 and N14/N14 DNA. The ratio would be 1:7 for N15/N14 and 2:2:2:2:2 for N14/N14 DNA.

Fourth Generation:
- By the fourth generation, the DNA would reach a stable ratio. The ratio would be 1:15 for N15/N14 and 2:2:2:2:2:2:2:2:2:2 for N14/N14 DNA.
Continuing the Meselson and Stahl experiment for four generations in E. coli would demonstrate the progression of DNA replication and the eventual stabilization of the ratio of N15/N14 and N14/N14 DNA.
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What will be the ratio N15:N15/N14:N14/N14 containing DNA's if Meselso...
16/2=8/1
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Read the following text and answer the following questions on the basis of the same:In one of his experiments on interference, August Jean Fresnel used a biprism to induce interference between two beams. He split a diverging beam of light into two parts by using the biprism to refract them. This resulted in two split beams which acted as if they were from two coherent sources and which therefore interfered with each other.A Fresnel Biprism is a thin double prism placed base to base and have very small refracting angle ( 0.5°). This is equivalent to a single prism with one of its angle nearly 179° and other two of 0.5° each.In Young’s double Slits experiment, a single source is split in two coherent sources. For the Young’s slits experiment, we must approximate that the slits act as point sources. This however is not the case, since the slits have finite width. In this way, it gives rise to unwanted diffraction effects that causes errors.The Fresnel biprism experiment overcomes this problem.A Fresnel biprism is a variation of Young’s Slits experiment. When monochromatic light through a narrow slit falls on biprism that divides it into two components. One of these component is refracted from upper portion of biprism and the other one refracted through lower portion. Two virtual coherent sources formed from the original source. In this case, two virtual coherent sources are point sources and replace slits in Young’s experiment.Q. Base angles of Fresnel biprism are

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What will be the ratio N15:N15/N14:N14/N14 containing DNA's if Meselson and stahl experiment is continued for four generations in E.coli ?
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