Meselson and Stahl Experiment Animation

Meselson and Stahl Experiment Animation - This animation video explains about the Meselson and Stahl Experiment. Find the lecture summary here- In 1953 James Watson and Francis Crick tomorrow of the structure of DNA printable features of which are still accepted today they have a consistent two strands that are complimentary and the sequences to each other as cytosine base once try and always pairs with a guanine base on the other hand adenine base and once try and always pairs with a thymine base on the other the complementary nature of the two strands suggested to the scientists are for DNA replication proposed that the old strand service templates to make new complementary strands that are resulting WSE's with each containing one and one old's grand there are other models to consider as well resemble the old DNA molecule could be preserved and an entire wing DNA molecule can be produced from it you result of the application will be to molecules with old and new DNA interspersed needs to add from your knowledge of DNA replication which one of these models is correct click on the correct model from your knowledge of DNA replication drag the correct names to the three models of DNA replication Watson and Crick proposed a model of semiconservative replication at the time no evidence existed to prove that this model was correct to solve this problem the scientists met in Brussels and infrequent stall designed an experiment to test Watson and Crick's model of replication the key to the masses install experiment was devising a strategy to distinguish between all versus newly synthesised DNA distinguish the two by labelling them with isotopes they grew Escherichia coli bacteria in the presence of either a heavy isotope of hydrogen in 15 over the ordinary light isotope 1014 generations the DNA of the bacteria containing either the heavy or old alike form of nitrogen but not both in this example the nitrogen atoms in a thymine base are labelled with either a heavy older white forms of nitrogen the scientists took samples of each bacterial culture they process the bacteria to release the DNA into solution equal volumes of the DNA solutions were mixed together and the solution was concentrated solution of the salt cesium chloride the density of the cesium chloride was 1.71 g/cm³ the same density as DNA that was placed after a centrifuge capable of high-speed centrifugation 140,000 times the force of gravity for 20 hours at this high-speed cesium ions have a tendency to settlement for the bottom of the tube forming a higher density solution at the bottom compared to the top other substances such as the DNA to the position within the tube that matches their own density watchband of DNA contains the heavy isotope in 15 of nitrogen click on the correct by and with the technique of separating heavy versus White DNA established the scientists tested the hypothesis of semiconservative replication the first group, why for 14 generations in a medium within 15 uniform of ammonium chloride as the sole nitrogen source growing bacteria for many generations ensured that all the DNA would be labelled with heavy nitrogen at this time the isolated the first bacterial sample prepared the DNA as the cesium chloride or centrifugation at the same time some of the bacteria were transferred to and 14 light medium and allowed to continue to grow from this point onward replicated DNA will be made with the likes form of nitrogen may call their first self generations are well after the transfer to light medium samples taken every 20 minutes which is the generation time for E. coli cells growing at the optimal temperature the DNA from the samples was prepared for high-speed centrifugation vessel is in install for the following results in generation zero all of the DNA was in the heavy for after one generation the DNA was neither healthy nor light by an intermediate density after two generations have of the DNA was white and half was in immediate and traditional generations of the DNA was alike form unless any intermediate form generation zero through to provide enough information to determine which model of DNA replication is correct click on the correct model with these hypothetical data suggest about DNA replication click on the appropriate model to add the appropriate density profiles to the generations on the left, we have examined whether they would look like for all three types of replication kid, I'd must also install is wielded a match with semiconservative replication.
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[@kirankoul1607]

Thanks a lot man . What an incredibly lucid explanation. I would like to genuinely appreciate you for giving us an insight of what this fascinating experiment is all about . Continue making such vedios that will change the understanding of molecular biology in a completely transformative way . One of the best explanations ever.

[@somyamehrotra5183]

Such a lovely animation please upload all video for this chapter and other also like cell cell junction , techniques , molecular biology , biochemistry , cell biology , plant physiology , genetics , immunology , developmental biology

[@vishaks1988]

Nice explanation ❤

[@michellehussain2367]

Keep the good workk .. Animation videos are mandatoryy

[@gdz15]

Thanks, You help me a lot

[@Heavenisours]

LOL my mother lang is german and i understood this Clip more than the german ones Crazy ! Thanks !

[@RayRay-yt5pe]

Yeah crazy.... Lol!

[@haribabug3144]

Nice and Neat clear explanation. Best work.

[@prajwals6645]

Thank you so much

[@soniaraj5999]

Did someone noticed the subtitles.... Lol😂😂But anyways this explanation is quite explainable 😌😌🤗🤗very nice content 😄

[@isabelrodriguez-tp2rg]

Great video but where is Rosalind Franklin's credit?! Cant forget her contributions!

[@sanamnawaz6443]

Excellent sir

[@kaviyanjalib145]

Thank you for an wonderful animation, it help me to understand good

[@kiranbedge4739]

Nice explanation 💝

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[@cook.king0844]

Thanks😁

[@revathysivdas2771]

Super

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this johnson so OP

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[@shiv_452]

❤️

[@rithanyas9402]

Bum... 🙂 😁

[@jaketheripper4567]

Why would anyone want to learn this? This is so stupid. This is because my name is Geoffrey Wong and I have a shit personality. However, my friend, Jake, likes grapes. Dune (2021) is a phenomenal movie, as the name suggests. Herman broke his leg.