Transcription and mRNA processing | Biomolecules | MCAT

Transcription and mRNA processing | Biomolecules | MCAT | Khan Academy

Рет қаралды 1,621,075

8 жыл бұрын

Courses on Khan Academy are always 100% free. Start practicing-and saving your progress-now: www.khanacademy.org/science/ap-biology/gene-expression-and-regulation/transcription-and-rna-processing/v/transcription-and-mrna-processing
Introduction to transcription including the role of RNA polymerase, promoters, terminators, introns and exons.
Watch the next lesson: www.khanacademy.org/test-prep/mcat/biomolecules/dna/v/speed-and-precision-of-dna-replication?YT&Desc&
Missed the previous lesson? www.khanacademy.org/test-prep/mcat/biomolecules/dna/v/leading-and-lagging-strands-in-dna-replication?YT&Desc&
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Пікірлер: 342

@sophies8573 6 жыл бұрын

This video is supposed to be for high school students and I'm a med student learning the exact same material 😂

@leandro6285 6 жыл бұрын

Same haha

@adibsiddiki7409 6 жыл бұрын

Sophie Van der Meer Well done on getting in, both of you. I'm hoping to.

@muaazbutt9342 6 жыл бұрын

And i thought i was alone xD

@RS6y6 5 жыл бұрын

I'm a med student too and I wish that this would be enough for the molecular cellbiology exam but it's not even close :'( Great video btw

@cpard2d2 5 жыл бұрын

I´m in a masters program and we´re learning this too. We go a bit deeper with the promoter sequences, transcription factors and the different polymerases but overall, it´s the same XD.

@numannedimayvaz1106 3 жыл бұрын

this dude is so damn amazing. His courses are free PLUS he hasn't any ads in his videos. Much Respect for this guy!

@mello-by Жыл бұрын

Khan academy is a non profit that you can donate to

@haiyun3251 7 ай бұрын

Lol mines tc has all her vids in yt monetized 😂 doesn't even show up to class, just ask us to watch 15-18 vids per week

@sleepyduck 8 жыл бұрын

the fact that you can digest all categories of subjects and then teach is mind boggling!

@ToksNation 8 жыл бұрын

I know right

@itsamemarioanne 4 жыл бұрын

YYYEEESSS! Sal is a gift for all of us x

@jeromeyklein8838 3 жыл бұрын

Maybe he just reads from a script?

@Luka1180 3 жыл бұрын

@@jeromeyklein8838 Well, he did get a Bachelor of Science from MIT...

@notwork2087 3 жыл бұрын

@@jeromeyklein8838 GFY

@unclelelax8341 5 жыл бұрын

10 mins lecture > 5 hours lecture

@aplus1080 6 ай бұрын

Naw, TikTok brain.

@kyloxd2700 6 жыл бұрын

Anyone else feel the passion in his voice when he talks about these said topics?

@nancygutierrez4856 4 жыл бұрын

I have no idea how you taught me something I've been studying for two weeks in 10 minutes and I understood perfectly. I wish you were my professor! Keep it up for the pre-med students please!!!

@janetchiang5658 8 жыл бұрын

it's so weird how you always upload topics about exactly what i'm learning in class!

@Aschalew5 5 жыл бұрын

advanced biology/ chemistry topics don't change often so it would make sense

@saniwada 5 жыл бұрын

The AP bio and AP chem cuirculum dont really change or varry much school to school

@kennarajora6532 3 жыл бұрын

it makes sense he would change his upload topic schedule to coincide with what kids are learning in class.

@Devilsfannumber30 6 жыл бұрын

if anyone wanted to know: spliceosomes are what cut out sections from the RNA strand to remove the introns and leave the exons

@schmidtythekidd 3 жыл бұрын

Nerd

@demaa.9364 3 жыл бұрын

thank you i needed it for my vocab !!

@KanekiKen-vm7zq 3 жыл бұрын

@@schmidtythekidd i dont think he is a nerd tho, look at his pfp

@akosuafrimpong4465 3 жыл бұрын

@@KanekiKen-vm7zq your comment 😂😂

@smol_chilli_pepper 3 жыл бұрын

I never imagined that one day Khan Academy videos would become so nostalgic to me

@rubyyxlc3936 6 жыл бұрын

I wish I would have found this while I was in microbiology, You explained in ten minutes what I couldn't even get from tutoring.

@toddsecor288 6 жыл бұрын

This person has helped me better understand chemistry, trigonometry, calculus, and now biology. He is truly amazing. He should be the dean of MIT.

@sarahfalcone8716 5 жыл бұрын

This helped me a lot to understand the processes in the different cells. Thank you a lot!

@cristianalima6623 5 жыл бұрын

I wish everything good for you, you just saved my exam! Thank you!

@silvanaban5797 6 жыл бұрын

Thank you for this. This was extremely helpful!

@astrovation3281 Жыл бұрын

I like how you don't just pass on the material but also pass on the passion

@shinysunglasses3617 5 жыл бұрын

This is amazing! I found it hard to understand in class because of how shallow it was, but with more details it makes perfect sense! Thanks a lot.

@yankeyaya1673 2 жыл бұрын

same, this video is very clear o.O

@cutieinahat4267 7 жыл бұрын

thanks for my marks khan-academy!

@rafiamushal83 4 жыл бұрын

This was so helpful for my university genetics class! thank you!

@sherlonsinclair1156 7 жыл бұрын

Your videos are amazing. Cannot possibly get any simpler. Thank you. You're a life saver.

@Testimonyofabutterfly 2 жыл бұрын

this was super helpful for learning this process! I am in awe of the creator God and his ability to make such a complex and beautiful process within such a small structure!!! Praise Jesus

@deathhog4409 Жыл бұрын

6 years and this still save lives...

@sarahholland5980 3 жыл бұрын

a whole lecture made ultra-clear in 10 minutes. thank you!!!

@anuradhawijethunga5880 2 жыл бұрын

This was really helpful for my last minute exam preparations ❤️❤️❤️ If it wasn't for youtube, I would've failed my uni exams.

@angiemihalas2319 3 жыл бұрын

5:55-6:27 nothing you need to take notes on, but the reminder we all need! biology is amazing.

@clintluna6884 5 жыл бұрын

Love the enthusiasm!! Awesome video! The Audio kept cutting out about every minute or so on my end, not sure if it's just me or anyone else??

@JorgeRamos-xw6dy 4 жыл бұрын

Wonderful! I'm getting my KZfaq degree. I navigate from MIT to Harvard to UC Berkeley etc...all for free lol. I wish this were around when I went to school. Thank you for the wonderful videos.

@dhivyaseker3378 5 жыл бұрын

This video is really helpful The way he teach is very understandable Thank you so much. It helped me a lot.

@m.a.shahid4927 7 жыл бұрын

RIP for Medved's exam, but this video made it much easier. Thanks and keep it up bro!

@tonyi4677 4 жыл бұрын

Thank you so much for the clear and "easy to understand" explanation.

@djennings-DDS 6 жыл бұрын

Great video - thank you. I liked the very clear explanation of Ribosomal RNA (that it doesn't need anything else to code, compared to the DNA where it needs Helicase, RNA Primers, Ligase, etc.) I also really enjoyed learning about the difference between the mRNA in prokaryotes vs. Eukaryotes. It's interesing that the Introns do not have a specific purpose, so the mRNA, is made up of what's left over after the splicing takes place (exons) of that "pre- mRNA". Again - I greatly enjoyed this video, thank you!

@aplus1080 6 ай бұрын

There is no dead weight in nature. I'm curious to see the mystery of introns resolved.

@djennings-DDS 6 ай бұрын

@@aplus1080 I’ve pretty much forgotten everything about RNA and introns

@pentachronic 6 жыл бұрын

This is absolutely fascinating. Thanks for the great videos.

@marygonzalez864 7 жыл бұрын

Does anyone know if there is a way to get a print out of the diagrams and pictures he shows. The way he explains all the processes with those visuals really help!

@seabass324 4 жыл бұрын

you can always screenshot and crop into word doc instantly :)

@yourfuturedocburenbeiya 4 жыл бұрын

Thank you so much for this video!! You're the best! Your handwriting is nice and the way you explain it is so much more interesting. I always have more appreciation of what we're learning because of the way you teach it in these KA Videos.

@Ash-zb7bu 5 жыл бұрын

thank you, khan academy, once again for saving my biology grade

@user-nt1jg6tg5z 5 жыл бұрын

I'm Korean university student. This explainment helps for Test. Thanks.

@TomDavis95 8 жыл бұрын

Important to note that in eukaryotes the pre-mRNA processing occurs co-transcriptionally and not post-transcriptionally!

@kuensedn1529 5 жыл бұрын

2 yrs later i watch this once again! :))

@mansiraja2623 6 жыл бұрын

Givee meee your handwriting 😻😻😻 and you actually have the capability of pinnng whatever you teach into my head!!

@fmsenga 6 жыл бұрын

Thank you for this tutorial...harpers is quite tedious to understand...this helps a lot

@jideo4701 7 жыл бұрын

Thank you so much! I'm gonna shed a tear.

@agnestee4261 4 жыл бұрын

Thank you! That was super helpful and easy to digest!

@chelsieb.593 2 жыл бұрын

i don't know how many times throughout my biology career, I've had to rewatch this video

@mrburns805 6 жыл бұрын

This dude seriously has a video for everything

@fasihakhan5319 7 жыл бұрын

you make mt life easy, stay blessed

@trensza 7 жыл бұрын

Nice. This makes so much sense now

@owenbartrop8963 2 жыл бұрын

Trust Khan Academy to provide more information than my government :D Thank you Sal, you're a real legend.

@spxtfxre1 5 жыл бұрын

Mr. Khan, you seem like an awesome human being to me. I really wish you could coach me in person. I got only 16 days left before my 12th grade final examinations start. Thanks a lot for doing what you're doing. That's really great work. Keep it up. I will donate when I am able to. ❤❤

@Malak.A.Mudallah Жыл бұрын

Me too as a fresh 12th grade student

@dotted_stains2792 4 ай бұрын

His cousins actually prefer him in videos than him in person, maybe it's the system that allows him to be as good as a teacher he is today :)

@shotgunner07gaming 3 жыл бұрын

This recap is just what i needed!

@bonedoggle 4 жыл бұрын

i learn more from sal than i do from my own professors

@saiamitchaddha5525 4 жыл бұрын

God Is Great, May God Bless them all and you all and your families

@Goldielopss 8 жыл бұрын

I needed this exact video a year ago :'C

@lawsonrodeehk1060 7 жыл бұрын

This guy is awesome...

@tomkrys3331 4 жыл бұрын

You should always remember that Biology is amazing. Yeah man it really is!!

@alltup8347 3 жыл бұрын

I’m literally watching this before my exam please wish me luck

@Star-pj8fz 3 жыл бұрын

what did you get?

@alltup8347 3 жыл бұрын

@@Star-pj8fz 34/50

@Star-pj8fz 3 жыл бұрын

I got a 75%. I hate biology 😂

@demetrakaskiri6987 6 жыл бұрын

thanks for helping on my Biology test!

@tulliachampney4713 2 жыл бұрын

love that my professor for my 400 level biochem class assigned us to watch this video

@benward5041 3 жыл бұрын

sal always makes me feel safe lol

@memomemo7643 4 жыл бұрын

Thank you soo much that was an 1.30 h lecture of nonsense that u just turned into the most interesting and understandable information in 10.24 mins

@ilove0918 2 жыл бұрын

you should upload more of DNA/RNA in depth processes!!

@princetandukar9290 3 жыл бұрын

Khan academy: You should be in AWE with this!!! *Me: YAWNs Biology: *am I a joke to you?

@claire7643 7 жыл бұрын

Sal Khan came to my school a few years ago... it was cool. Except I'm dumb and can't understand anything.

@FreeWaves9 Жыл бұрын

This man is single-handedly carrying the US education system

@why6207 5 жыл бұрын

You are the best teacher I have ever seen

@michael_alan 2 жыл бұрын

You are very clear in your teaching Many thanks!

@adrienne2838 Жыл бұрын

i rememver watching this in high school and now im in my gap years. and im. still watching this

@tamimurrahman6464 7 жыл бұрын

thank you very much.it helped me a lot for my exam today

@alandriaglenn3145 2 жыл бұрын

I am so grateful for your videos! Thank you!

@deboisdead Жыл бұрын

honestly as a hon bio student you save my life thank you

@abdidahirmohamud7353 7 жыл бұрын

thanks for the video. it really helped me a lot understanding that

@fersiva1 6 жыл бұрын

Hi Mr Khan, thanks for the explanantion but can you explain on the process on how the cap and tail is added and their purpose in conversion of pre mRNA to mRNA?

@averagestudent5222 9 ай бұрын

With all these videos I don't think its necessary to go to school anymore

@saamerrsamer2895 6 жыл бұрын

Really thank you you helped me alot❤

@sherm7107 3 жыл бұрын

Gene editing eugenics, using aborted baby cells and tissues also, GMO nanotech particles

@vbtherapy3309 6 жыл бұрын

so beautiful. great diagrams

@samstokes3968 6 жыл бұрын

Dude thank you!!!! Very helpful!

@rakeshbhaskar629 5 жыл бұрын

Thanks a lot that a amazing explain..

@evanli9757 7 жыл бұрын

did you pre-draw all those shapes of ribosomes, DNA, and others?!?!?!?! that's insane

@thelastcipher9135 8 жыл бұрын

what playlist is this? thanks :)

@11194358 2 жыл бұрын

''someone like me is going to give you these nice clean narrative'' is funny haha

@sciencenerd7639 Жыл бұрын

turns out helicases are involved in transcription after all still a great video, keep up the good work Khan Academy, thanks!

@user-mv9lc6uf4t Жыл бұрын

Thanks for the great explanation 🌹

@ElloBoppit 3 жыл бұрын

It is mentioned in this video that the RNA Polymerase is more than enough to open the DNA and begin transcription. However, in my Kaplan biochem 2020 MCAT prep booklet it says that RNA Pol II is preceded by helicases & topoisomerases to address unwinding/supercoiling. So both work?

@allysonperez5241 8 ай бұрын

I love how you get excited about the material. Makes us students much more engaged and excited too. Endless thank yous Sal!!

@omarsalama1375 2 жыл бұрын

Allah who made this incredible staff..

@mdijkman9386 3 жыл бұрын

Since this video has been uploaded one thing has been discovered. In termination, right after the hairpin is formed a bunch of Adenine's are present in the DNA, this makes it so that A lot Uracil's are transcribed. The bond between A en U (also T) is quite weak, with only 2 hydrogen bonds formed. So the pre-mRNA falls off.

@praukefetry7507 5 жыл бұрын

I am in goddam awe every time!!!

@momin665 2 жыл бұрын

Amazing sir and made my day God bless you

@charlotte-xd4mq 2 жыл бұрын

THIS is what's helping me to keep up with my bio class 😂

@mihirmakwana9012 3 жыл бұрын

M in 1st year medicine and m watching this coz it's very helpful 🤪😅🔥

@tutik234 6 ай бұрын

This video is very well done. Thank you I understood everything. I'm 14 and you explained it very well. ❤

@leifthurmond9864 Жыл бұрын

You’re amazing thank you teaching us all😁

@Jojo-kl6tx 5 жыл бұрын

Awesome video, in general awesome videos. I study Applied Biology and it's great to have your videos and from there read further into the subject. Thanks a lot! (also, this is great for getting an overview since I have no idea how to get all the biology stuff in my head I need to know in three days)

@ahmedabdulrhman1358 5 жыл бұрын

realllllllllllllllllllllllllllllllllllllllllly huge thanks, you are great and amazing teacher

@moustafazain3833 6 жыл бұрын

that is amazing ty very much

@icaass2727 7 жыл бұрын

thanks for the video, such a very good video :)) but just realized that all cromosome or nucleus or enzyme or even protein picture we see in our textbooks or internet just an animation, so it's must be very very complicated in the real life. yet that's all are fascinating things to know about