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100 thoughts on “Transcription and mRNA processing | Biomolecules | MCAT | Khan Academy

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

  2. 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!

  3. 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

  4. Are the m RNA being formed are also hydrogen bonded to The template DNA ? and does termination remove the bonding cuz the picture gives a different view

  5. I came here for the snRNA and the spliceosome (U , 12456) and he says hes not going into details… is there a particular video

  6. I don't know much about DNA and RNA but I'm only learning this for my crush because he was confused about his essay. Love goes a long way. Good thing I'm a quick learner. Thanks for this video.

  7. 5:28
    The RNA being transcripted has the same sequence as the coding strand (with the Uracil replacing Thymine), BUT they don't have "the same information".
    If the coding strand were being transcribed here, it'll give a different RNA sequence, therefore a different order of codons, which eventually gives different amino acids (different protein). So yeah, not the same information =)

  8. Hi.
     i can a little bit speak Englisch . And very good german but you dont speak german i think. i write to you that you say me if you know it, with help which program i can create biology Pictures like in genetik? i mean Polymerases, Enzme, Proteine, and so on.

    I wanna to know the name of this programm with help you create the video also. Please send me the download link.

  9. thanksssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss

  10. hi. just a question because i got confused. I am currently reading Harper's Medical Biochemistry. i usually watch your videos when i can't understand the book. According to Harper, the strand that is transcribed or copied into and RNA molecule is referred to as the template strand, and the other DNA strand, the non coding strand, is frequently referred to as the coding strand. I think you interchanged the terms in your video. Can you please clarify these things. Thank you so much!

  11. 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?

  12. So so frustrating!!!! Different people are telling me different things!!!! Is it helicase or rna polymerase that separates the dna strands?!?!?!?!?!?!??

  13. Do you ever just study cellular biology and think about how little we actually know about this shit…

    like when you said, "the RNA complex changes" to let go of the strand, i thought, wow…
    things don't just change but hes right cause that's what is taught because that's just how we perceive what is occurring under a microscope

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

  15. not in depth enough, even though content is good and nicely explained (well just saw that it is for highschool, so nvm, for that this should suffice)
    [in my opionen]

  16. 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!

  17. Introns are believed to be regulation regions for transcription and genome evolution. Calling them nonsense is something not done anymore. Many things in molecular biology change every 6 months.

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

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

  20. Can someone please explain to me how mRNA synthesis can begin on 3' end of antisense/template strand if all of the promoting sequences (CAT & TATA) are toward the 5' end of the molecule?

    Is RNA polymerase reading both strands of the DNA molecule and only transcribing from the template strand?

    thanks in advance!

  21. 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.

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

  23. i dont know why we cut out the introns just because we dont know what they do yet?? what if they did something really important and we have just been cutting them out all the time??

  24. 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.

  25. Thanks.what is the primary,secondary,tertiary and quaternary structure of DNA??and how hydrogen bonds contributed in stability of DNA?l want answers please

  26. Question about the 'unzipping' part of transcription:

    My biology teacher told me that DNA helicase does this,

    however my Chemistry teacher told me that RNA polymerase does this and helicase is only involved in replication.

    Who is correct? :'( they're both great teachers.

    EDIT: after a lot of googling it seems pretty much 50/50 to either helicase or polymerase – if anyone knows which one it actually is please let me know how you know lol and why lots of people are mistaken.

    Any info would be really appreciated!

  27. Gona kill my bio final. Thanks for the videos bro they've helped me so much. Very confident I'm going to get the A I need in this course!

  28. The verb 'splice' means 'to join together'. Unfortunately it has been used in the wrong context here, you don't 'splice out' the introns but 'splice together' the exons.

  29. 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)

  30. 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. ❤❤

  31. 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??

  32. 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

  33. 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!!!

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