AS Biology - DNA semi-conservative replication (OCR A Chapter 3.9)

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  • Опубліковано 14 лис 2024

КОМЕНТАРІ • 53

  • @pizzaraccoon8202
    @pizzaraccoon8202 5 років тому +65

    I told all my friends who take biology about your videos, they’re so so helpful

    • @BioRach
      @BioRach  5 років тому +7

      Aww thank you, that's very kind of you! I hope your friends find the videos helpful too :D

    • @pizzaraccoon8202
      @pizzaraccoon8202 5 років тому +6

      BioRach no problem! Thank you and they did, we’ve got a mini biorach fan club within school now hahaha

    • @BioRach
      @BioRach  5 років тому +5

      omg haha thanks for the support! XD

  • @alex-p5
    @alex-p5 Рік тому +1

    These videos are amazing. There is no over-complication whatsoever and the diagrams you draw, along with the explanations you provide are concise and effective. Thanks!!!!

  • @rhea567
    @rhea567 4 роки тому +16

    thank you xx love the step by step written diagrams-much easier to follow than powerpoint slides!!

    • @BioRach
      @BioRach  4 роки тому

      Haha glad to hear that! Thanks for watching :D

  • @mints7649
    @mints7649 5 років тому +29

    Very helpful, straight to the point and diagrams make it easier to understand.

    • @BioRach
      @BioRach  5 років тому

      Haha glad to hear that! Thanks for watching :)

  • @ok-hd4ir
    @ok-hd4ir 2 роки тому +2

    On the 2nd point you didn't mention that hydrogen bonds are reformed between the complementary base pairs: Adenine (Purine) + Thymine (Pyramidine) and Guanine (Purine) + Cytosine (Pyramidine) are lined up via hydrogen bonds then adjacent nucleotides join by Phosphodiester bonds via DNA polymerase.

  • @janelle5568
    @janelle5568 4 роки тому +4

    Been trying to find a video explaining this for ages! This was super helpful! Thank you x

  • @ShimmerRain6
    @ShimmerRain6 8 місяців тому +1

    I am using OCR, Do I need to know about DNA ligase?

  • @rainbow.snipper4985
    @rainbow.snipper4985 3 роки тому +2

    Great video, very clear and easy to understand, thank you!

  • @Kevin-pt7bz
    @Kevin-pt7bz 4 роки тому +4

    This is a really good explanation and actually helped correct a misinterpretation I had so thanks a lot!
    However I think you should've included the leading and lagging strand for DNA polymerase, unless it isn't needed?

    • @BioRach
      @BioRach  4 роки тому +2

      Haha glad you found it helpful! :D I'm interested to know (if you don't mind sharing), what the misinterpretation you had is about?
      And yes, the spec doesn't include the Okazaki fragments so I didn't talk about it. But it's good to know it so well done :)

  • @mansisingh9924
    @mansisingh9924 4 роки тому +3

    Great video! But there is a mistake at the end: the very last molecule will be a light one, n14, and that was the evidence of semi conservative replication not n15

    • @sewa900
      @sewa900 4 роки тому

      yes i agree it should be a mix of n14/n15 and n14 not n15

  • @themoralshow902
    @themoralshow902 3 роки тому +2

    Thank you❤️
    From 🇱🇰🇱🇰🇱🇰

  • @AnchalD
    @AnchalD 3 роки тому +1

    great video...but what about the dna ligase

  • @momonaali9486
    @momonaali9486 3 роки тому +1

    I love you for this omfg you just made my life so much easier

  • @mwansachikonde4193
    @mwansachikonde4193 4 роки тому +2

    Where do the free nucleotides in step 2 come from??

    • @kelisa4894
      @kelisa4894 4 роки тому +2

      not in the OCR spec but they're just floating around

    • @user-qt5dq8mg6w
      @user-qt5dq8mg6w 4 роки тому +1

      floating around in nucleoplasm

  • @logeeshan5
    @logeeshan5 3 роки тому +1

    Thank you so much
    Everything is crystal clear now
    I got the picture
    Really appreciate it
    Good tutoring

    • @logeeshan5
      @logeeshan5 3 роки тому

      It's so nice of you to share your knowledge

  • @natashajoyy4223
    @natashajoyy4223 4 роки тому +1

    So clear and helpful! Thank you

    • @BioRach
      @BioRach  4 роки тому

      Glad you found it helpful, thanks for watching! :)

  • @skyhiis
    @skyhiis 3 роки тому +1

    i love your videos so much! they are so helpful ☺️

  • @PeonyRosey
    @PeonyRosey 2 роки тому

    Very well explained with diagrams. Thank you so much! I just subscribed

  • @maazahmed9077
    @maazahmed9077 3 роки тому

    Hey what about the other type of DNA replicatoin the one with ligase and primer, when is that used?

  • @jadedarby2460
    @jadedarby2460 5 років тому +2

    very well explained!!

    • @BioRach
      @BioRach  5 років тому

      Glad you found it helpful :D thanks for watching!

  • @abdullahpatel5517
    @abdullahpatel5517 2 роки тому

    which video do you explain dna and its properties: double helix, backbone, anti parallel etc??

    • @BioRach
      @BioRach  Рік тому

      I've made a video recently on this topic - check the Ch.3 playlist :)

  • @tee9771
    @tee9771 3 роки тому

    Please do a video on 3.8

  • @alexg9544
    @alexg9544 Рік тому

    That wa so helpful. Thank you!

  • @betul-ev2fu
    @betul-ev2fu 4 роки тому +1

    *ur a lifesaveeeerr, thx*

  • @suryakollapudi8470
    @suryakollapudi8470 5 років тому +3

    You're amazing

    • @BioRach
      @BioRach  5 років тому

      haha glad you find it helpful :D Thanks for watching!

  • @lewisgibson4478
    @lewisgibson4478 3 роки тому

    Thank you

  • @waifunglam4116
    @waifunglam4116 4 роки тому +1

    Shd not it be parental dna r made up of heavier N-15?
    Thx so much for yrself clean explaination. U r such a good teacher

    • @BioRach
      @BioRach  4 роки тому +2

      No, our DNA is N-14, regardless of the gender. We as scientists can engineer DNA to have N-15 only for experiments to learn more about DNA, most notably the experiment which discovers the semi-conservative mechanism.
      Hope this clears things up, and thanks for watching!

  • @smallcatbigmeow
    @smallcatbigmeow 5 років тому +1

    This helped sooooooo much thx!!

    • @BioRach
      @BioRach  5 років тому

      Glad to hear that it helped :) Thanks for watching!

  • @drake-om7ir
    @drake-om7ir 3 роки тому

    hello Rebeccas biology class

  • @rimshasarwer1087
    @rimshasarwer1087 3 роки тому

    You are superb

  • @salehkhalid2155
    @salehkhalid2155 4 роки тому

    i love ur voice its so cute for some reason

  • @adityaiyer801
    @adityaiyer801 3 роки тому

    what about Okazaki fragments?

    • @BioRach
      @BioRach  3 роки тому

      Not in spec but definitely interesting to learn about them :)

    • @adityaiyer801
      @adityaiyer801 3 роки тому +1

      @@BioRach Wait they're not in the spec? I'm surprised the textbook has it!

    • @BioRach
      @BioRach  3 роки тому +2

      @@adityaiyer801 It's in a purple box, which tends to give interesting content for those who'd like to know more! It's also definitely worth understanding though, since it's a natural thing to consider when you learn that the DNA polymerase only works in one direction...!

  • @clamchowder7609
    @clamchowder7609 4 роки тому

    Doing math bio chem physics and biology is killing me😂 it tko hard to revise

  • @georgekimuli872
    @georgekimuli872 Рік тому

    🧐