Meselson and Stahl experiment

[@aqueltiempo1669]

I had to vibe to the music in the beginning by going back muliple times.

[@Yankee4ever2]

shit is fire

[@zafaran77]

I'm learning so much but feel like I'm at da club

[@anniemcmahon6778]

I had a test today, and we had to draw the lines in the test tubes, I vaguely remembered what the drawing of the experiment from the revision book looked like and I got it right?? I’ve rly impressed myself today

[@fatimakhan845]

This channel just helped me prepare like a whole unit in about 6 mins and 3 videos

[@mareig1421]

I'm a German student and I understood the experiment only with this video in a foreign language 😅Well done!👍

[@sudhanvams3513]

and your English is good

[@zuzubiee9715]

Hi from India... Namaste from India...

[@sandyaraghu6623]

Tq..u

[@sandyaraghu6623]

For easy teacher..

[@Islamic_insight552]

I'm from Pakistan🤗😂

[@buttercup1627]

The accent tho 😂 Great vid btw. Really cleared it up for me 👍🏻

[@zai7153]

even i was thinking the same, i mean he went from American- British to idk we can't call that indian either.

[@thierrytrevorbusinge8186]

I loved this video; simple,precise and entertaining(the music in the background). since it has one beat all through it isn't distracting

[@glamourguide-n8d]

the forced accent is killing me

[@dianaturalist178]

then read a book

[@lady88569]

@@dianaturalist178 It's not that deep. You don't get the implication cause you're not desi. Move along.

[@rhythmdew8928]

Preach!

[@zai7153]

same 😭😭

[@Zeeshanizhar]

Truth😂💯

[@dr.gowriravichandran5394]

Short nd sweet.. Good one 👍..I subscribed expecting even more good videos

[@pranavivedula]

This was so helpful! You explained this in a much more precise way than my textbook! Thank you so much!

[@zai7153]

Person: Have you got an accent? Yes. The accent 📉.

[@PetGhostAngel]

Here's a step-by-step explanation of the Meselson-Stahl experiment: 1. **Labeling DNA with Heavy Nitrogen (15N):** - E. coli bacteria were grown in a medium containing a heavy isotope of nitrogen, specifically nitrogen-15 (15N). - As a result, the DNA synthesized by the bacteria during this period incorporated the heavy nitrogen into its structure. 2. **Transfer to Light Nitrogen (14N) Medium:** - After several generations of bacterial growth in the presence of heavy nitrogen, the researchers transferred the bacteria to a medium containing the more common, lighter isotope of nitrogen, nitrogen-14 (14N). 3. **DNA Sampling at Different Time Points:** - The researchers took DNA samples from the bacteria at different time points after the switch to the light nitrogen medium. 4. **Centrifugation and Density Gradient Analysis:** - The DNA samples were then subjected to a process called density gradient centrifugation. This technique separates molecules based on their density. - The DNA samples were spun in a centrifuge through a density gradient, which allowed the separation of DNA molecules based on their nitrogen content. 5. **Observation of DNA Bands:** - After centrifugation, the DNA formed bands at different positions in the density gradient tube. - If replication followed the conservative model, the bands would show distinct heavy and light DNA molecules. - If replication followed the semi-conservative model, the bands would show an intermediate position, indicating DNA molecules with a mix of heavy and light nitrogen. 6. **Results Confirming Semi-Conservative Replication:** - The results of the experiment showed an intermediate band after one round of DNA replication, supporting the semi-conservative model. - In subsequent generations, the intermediate band persisted, and new bands corresponding to fully light DNA appeared, confirming the continuous incorporation of light nitrogen into newly synthesized DNA strands. The Meselson-Stahl experiment provided compelling evidence in favor of the semi-conservative model of DNA replication, as opposed to the conservative or dispersive models.

[@Teddy_bear796]

Thank you so much for this video ma’am. It really helped me to understand the concept

[@khusboothapa1991]

Subscribed for the simplicity

[@sandyaraghu6623]

Yeah ..when I searched for the missed connecting links ..I got through this vdo..thank u..dear

[@fn5182]

Best teacher ever love from kazikistan

[@092vanlalawmpuia7]

What accent was that 🤣 i fuckin love it

[@YourWorstNightmare01]

Worst accent 😂

[@malli9995]

That background music erritating Mee soo much.... 😕😕

[@atiranjanameshram5611]

Thank-you so much sir God bless you

[@miqdadkhorakiwala4662]

What’s with that semi conservative accent?😂

[@s_manahil]

ahahaha😂😂

[@AnkitRaj-pr2ml]

hahahaha...its more like "see my conservative" ...lol..but thats the ryt way to pronounce it

[@P0P0_xyz288]

Very thoroughly explained, liked it!

[@emperoroftheuniversefrieza98]

Can someone help me at 2:18 I am confused at the one forming on time of 20mins

[@zoyausmani3213]

The Ecoli cultured in N15 was transferred into the Ecoli cultured in N14 And in the first generation we get to see the hybrid N14N15 and later in the second generation we get to see 2 density gradient band one is the hybrid N 14 and 15 and other is the N14

[@dualltalks]

Thanks from India🇮🇳🇮🇳

[@Swapnamoh]

What an amazing explanation 👍👍🤗

[@patrickrowan2184]

If some N14/N14 can also be made in the second medium, why can 2 N15s not find each other here similarly?

[@NandiniR-ib2jg]

Anyone in 2024😊

[@SohomDutta]

Yeah

[@Lavgeous]

Yup

[@Desichan_toon]

Hey! Are you from India🇮🇳

[@Sharin_2007]

Here from 2025

[@esmfamil5086]

AAMC should hire him to make a video for every question lol.

[@tarunvalavan1956]

Nice video simple but perfect...👌👌

[@balkarap5326]

Clear & simple, thx!

[@fakesharma6023]

From India Namastey......

[@animationsource3446]

Very easy to understand

[@justbedramatic]

I still don't get it 😭

[@studywithnidhibharatwanshi8873]

Its been 7 months did you get it now ?

[@dayanadjadhav8197]

Sir i am a 2021 bach student so I want to neet 2021 exam date so plz I will request you give me updateds

[@toptrendingvideos1199]

Please also upload a video on beadle and tatum

[@arslanxhan4610]

best teacher ever love from pakistan

[@thanksyoutube5551]

Thank you for this information 🌼

[@hariunique391]

Then after 2nd gen, only light band replicates

[@alishashashasha6909]

This was a very each to understand video!!

[@saptarshirouth7650]

you have to describe it vastly

[@abdurrahmanofficial7034]

Nice lectures

[@Sims_beat]

Lovely and very informative 👍🏻

[@neamhmcshane]

I need song name rn

[@sm.creation7029]

Please try to off the background music, it distrubs in hearing 🙏🙏🙏

[@AnjanaDebbarma-ox5el]

Thankyou so much sir ❤

[@bindusheena7482]

This one reeeaaaallllyyyyyy helped me

[@sachitsharma1661]

I love mathematics , [ 2^(n+1) ] - 2=Number of Strand of heavy isotope , n=number of divisions 🔥🔥

[@shashwatkharod3988]

Thanks! Really helpful

[@jawaidbhatti3254]

Very quick and complete thanks

[@swapnapais8379]

Short simple but very useful.. thanks..

[@mdkausar5887]

Very well Explained.

[@Chalcydony]

Well explained 👏👏

[@980Daisy4]

🙂 Quite easy! Perfect understanding.💎

[@carloslozanoalcolea5588]

great video

[@BiniamBeyene-nk5sr]

Thanx

[@kacycarson2785]

Music went crazy

[@sureshparit1729]

Nice👍

[@anugrahrai1318]

thanks

[@anasfamily1631]

Well explained

[@sebastianjm5965]

very informative. :-)

[@paramitadas1756]

thank you

[@gunjanpharasi]

Thank you, it helped indeed..

[@somayamahmoud5752]

Thank you.

[@rudolfgyorkei9558]

Thank You Mr.

[@emxcly2328]

Thank youuu :)

[@tha_so_ni51]

I was struggling to understand this!!!!!! Thaaaaaankssss♥️♥️♥️♥️

[@sanjayprakash4962]

Indians reporting,!!!🦁

[@a.mplays275]

Could visualize better by your animation thank u very much..

[@farhanarshad195]

This guy is an indian and trying to speak in foreign accent

[@abdoulazizdabo9064]

And what’s wrong with that.

[@ambivert098]

Thank you .finally I got it😄

[@vedikatalele8367]

It helped.thanks

[@korosuke_robot]

neet aspirant?

[@711CokeSlurpies]

Wassup MCAT FL1 homies. I love you.

[@shayeestanihal8500]

Very nice

[@shareeffwity9583]

Why there is music in the background!? It is so bad man I couldn't concentrate at all wtf

[@santramariya849]

are u that weak lmao

[@shareeffwity9583]

@@santramariya849 Yeah actually if there is a bad annoying music that means I am weak .. I feel sorry for you thinking that it is a sign of weakness . I wish I was strong like you WTF man don’t make me hurt your worthless feeling , what a shame .

[@santramariya849]

@@shareeffwity9583 i was rude cuz u were rude thats all im sorry

[@ayzarizi]

Thank u bro u saved me

[@nehabookiology1415]

Tysm

[@Mani-cn9vw]

👍👍👍👍

[@hbd6390]

Hum aapke school mai admission lelege baat to ek hi hai

[@Eric-ed1zl]

This guy sais strand like owen whilson sais wow.

[@kamatchidevendiran486]

Nice

[@MayankSingh-uj6hi]

best videos

[@riyapaswan3884]

I don't understood.. make it more clear next time

[@krishnadaskuduvakkode6603]

Cos you are dumb

[@harishchandranair9765]

@@krishnadaskuduvakkode6603 😂😂😂😂😂

[@izzamaryam3940]

Woww it's very easyy

[@ramansidhu5233]

Short and gud

[@sonitclef8675]

STWAANDD! LMFAO

[@n1nah]

J Summers i’m dead

[@amenaali7193]

😭

[@sonitclef8675]

@@amenaali7193 dont laugh at this insensitive shit bag

[@cmgs7]

yall lmfaooo

[@reggaerhia4153]

this was good but her voice, the lisp..

[@FoootbolFrenzyvision]

🎉

[@anuahuja1930]

👌👍

[@aarohityagi4630]

Bad background sound

[@Kavitakukreti230]

The accent is cringing me fr

[@emperor8716]

this terrible accent is killing me. 0:45 "PAWent strand" 😭

[@Rush-i3k]

My life was a lie ..I thought it's semi conservative...but it's semeeeiiiiii conservative

[@vishalnayak3992]

Nice video but I think your voice is very weird like seriously..

[@napoleoncontreras4184]

U talk soo sloooow

[@SlayTYT]

I don’t understand this at all😀

[@laurax9245]

Slayyyyy

[@thajunnisakt5684]

Background music was irritating and the accent used was difficult to understand

[@YourWorstNightmare01]

Bhai bohot gandi accent hai

[@jatinthakur7887]

main bhi yehi likhne vala tha...........itna fake accent kisi ka nhi dekha maine

[@YourWorstNightmare01]

@@jatinthakur7887 sahi mei😂

[@anjaliihere_]

😂😂

[@Tyler-iw4kw]

ITS STRAND S T R A N D STRAND OK

[@Jay_H0931]

stwand

[@lucagomarteli7391]

This video did not help me, thanks though!

[@madisonjohnson8431]

This makes absolutely no sense :(

[@rashidaislam7180]

Well explained but the accent, sounds annoying....

[@UserNn_20]

What the hell is this accent