AQA 3.13 Amino Acids, Proteins and DNA REVISION

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  • Опубліковано 17 гру 2024

КОМЕНТАРІ • 77

  • @racheldoran9758
    @racheldoran9758 3 роки тому +202

    Timestamps:
    AMINO ACIDS (3.13.1)
    2:28 - Amino Acids Overview
    4:39 - Naming Amino Acids
    7:17 - Zwitterions + Amphoteric Properties
    **
    PROTEINS (3.13.2)
    10:13 - Thin Layer Chromatography
    19:38 - Proteins Overview
    20:56 - Formation of dipeptides + polypeptides
    22:58 - Hydrolysis of a polypeptide (overview)
    24:15 - Primary, Secondary and Tertiary Structure
    28:12 - Hydrogen + Disulphide bonds in proteins
    **
    ENZYMES (3.13.3)
    31:40 - Enzymes overview
    34:06 - Specificity of Active Site + Stereospecificity
    37:25 - (Competitive) Inhibitors
    39:10 - Inhibitor drugs
    **
    DNA (3.13.4)
    42:33 - DNA Overview + Nucleotide Structure
    44:32 - The 4 DNA Nucleotides (structure)
    46:37 - Polynucleotide formation
    49:14 - Double Helix Structure + Base Pairing/H bonding
    **
    ACTION OF ANTICANCER DRUGS (3.13.5)
    55:32 - Cis-platin as an anticancer drug

  • @alandkadr831
    @alandkadr831 3 роки тому +327

    may allah shine his light on you the way you have on me

  • @Wasteman365
    @Wasteman365 2 роки тому +40

    The fact that you into so much detail is insane to me, I have so much respect for you, though I rarely need this much detail. Your videos are extremely useful for those who are self teaching

  • @DanceMomsMad
    @DanceMomsMad Рік тому +25

    Anyone else watching this before tomorrow’s exam? I’ve never understood biochemistry so now I’m watching this in 2x speed because I don’t have much time.

    • @DoubleAAce
      @DoubleAAce Рік тому +7

      Yup except for me this is the only topic i understand fully because i do biology

  • @daalhead1098
    @daalhead1098 2 роки тому +6

    The severe conditions of the protein hydrolysis really makes you wonder in awe at how the enzymes break the proteins in food down in mere hours in room temperature!!!

  • @mnamna9039
    @mnamna9039 3 роки тому +25

    “I don’t have hair myself” 😁

  • @Zen_Zen_Zense
    @Zen_Zen_Zense 2 роки тому +6

    51:00 I just use " Apples grow on Trees and Cars in Garages"

  • @drneutro369
    @drneutro369 9 місяців тому +1

    Sir this video is amazing! My teacher isnt that good, so I'm using these to learn the content, you explain things much better than my teacher

  • @agedhippy2407
    @agedhippy2407 3 роки тому +25

    Awesome! I find this topic tough, I dont know why its in Chemistry, but this video really helped me understand it.

  • @lonelyweeb7959
    @lonelyweeb7959 4 роки тому +6

    Cheers mate so helpful during Clovid isolating

  • @fryhyh
    @fryhyh 6 місяців тому +23

    Holy sweet mother of neptune I am unbelievably cooked tomorrow

    • @AngelIsTakn
      @AngelIsTakn 6 місяців тому +2

      SAME! I havent even memorised the organic route and NMR

    • @bee.mp69
      @bee.mp69 6 місяців тому +1

      i’m crying rn, so cooked

    • @bee.mp69
      @bee.mp69 6 місяців тому +5

      UCAS clearing looking really good rn

    • @teesmilk1264
      @teesmilk1264 3 місяці тому

      what are u doing now lol

  • @Cars.r.us2023
    @Cars.r.us2023 2 роки тому +1

    4:12 carbon is actually the heaviest metal as carbon forms diamond and about 1 gram of diamond weighs about 15g

    • @olliej079
      @olliej079 2 роки тому +22

      carbon is not a metal lol

    • @qasimkhan34
      @qasimkhan34 9 місяців тому

      i smell the tism. how can 1g weigh about 15grams. delete this comment u embarassment

    • @squ1diot
      @squ1diot 7 місяців тому +1

      🤣

  • @nadhaaw4748
    @nadhaaw4748 4 роки тому +4

    Suuuuuper helpful + thorough, thank you!

  • @g4m3rsye11
    @g4m3rsye11 4 роки тому +19

    An excellent video

  • @leniw8121
    @leniw8121 3 роки тому +5

    does the hydrolysis of a protein need to be refluxed for 24 hours (as it says on the powerpoint) or 48 hours (like you say)

  • @HAHAHA-rq7nq
    @HAHAHA-rq7nq 2 роки тому +4

    Hiii, I am a bit confused so if you could please clarify this I would be greatful (OFFICIAL A-LEVEL CHEM IN 3 DAYS!!) You said at 35:18 that only one enantiomer of the SUBSTRATE can fit into the active site of the enzyme. Wouldn't it be that only one enantiomer of the ENZYME can fit into the substrate? Because saying that the substrate has an enantiomer is assuming that the substrate is also chiral, and surely not all substrates are chiral? Please clarify this ASAP thank youu!!

    • @Zen_Zen_Zense
      @Zen_Zen_Zense 2 роки тому +1

      nope, i dont think he made a mistake, search stereospecific enzymes and youll get a better understanding - goodluck for the exams on Monday, lets hope its easier then paper1!
      Edit:
      "Enzymes | A-level Chemistry | OCR, AQA, Edexcel"
      ua-cam.com/video/0I8aPGKxwAU/v-deo.html -> go to 2:42, he explains it

    • @realshyt4real
      @realshyt4real 2 роки тому +3

      An enzyme is usually specific to the molecule it is breaking down (at least for A Level), so literally no other molecule will fit into that specific enzyme, hence the "lock and key" description.
      So in the case that an enzyme 'lock' has a specific substrate 'key' that is chiral and has enantiomers, that enzyme is only fitted to break down one of those enantiomers, hence is stereospecific.
      Just think of it like enzymes are really picky, and will only break down one specific molecule, and not even their enantiomer will do. Either way the enzymes discussed in proteins tend to be for chiral molecules, so they are stereospecific and only allow one enantiomer to be catalysed by it.
      I hope this helps, currently revising for Paper 2 and 3 as well this week, my bad if I got something wrong with what I said but I'm pretty sure that's what's happening here. Wishing you and me both the best of luck in the next 2 papers, we got this.

  • @jaskamalsingh7839
    @jaskamalsingh7839 6 місяців тому +28

    beyond cooked

    • @noone2407
      @noone2407 6 місяців тому

      Soooo cooked

  • @ai54a
    @ai54a 4 роки тому +6

    Do you reflux the hydrolysis of proteins for 24 hrs or 48 hrs?

    • @miinziiiiiii
      @miinziiiiiii 3 роки тому +6

      Googled it and it’s 24 hours according to chemguide

    • @benobrien2030
      @benobrien2030 2 роки тому +4

      may depend on the exam board you have but for AQA the answer they expect is 24 hours

  • @mnamna9039
    @mnamna9039 3 роки тому +4

    This is so helpful thank you Sir🙏

  • @sbraypaynt
    @sbraypaynt 3 роки тому +2

    10:15 might be my lack of knowledge
    But I think that’s a typo at the bottom right?
    The Hydroxy will become deprotenated in high pH not the Amino group
    Otherwise you’d have Nitrogen with one Hydrogen bonded to it right?

    • @Wasteman365
      @Wasteman365 2 роки тому

      No, it's comparing to the zwitterion. The zwitterion has NH3+ and the one at high pH has NH2. The hydroxy is already deprotonated as a zwitterion

  • @numbernine5894
    @numbernine5894 6 місяців тому +17

    2024 gang?

  • @katheriner6456
    @katheriner6456 6 місяців тому +15

    ANYONE FOR 2024 PAPER 2 ?

  • @jayrddd
    @jayrddd 6 місяців тому +1

    @51:00 NickEh30 reference?

  • @nelliebell5455
    @nelliebell5455 4 роки тому +4

    Thank you! Very helpful :)

  • @moa7651
    @moa7651 2 роки тому +1

    Is this for AS too?

  • @zarakhan-gv7uv
    @zarakhan-gv7uv 4 роки тому

    Thank you so much!

  • @isabellecrabbe9992
    @isabellecrabbe9992 9 місяців тому

    thank you!!!

  • @aishworyaparajuli3949
    @aishworyaparajuli3949 4 роки тому

    Thank you!

  • @Paintex600
    @Paintex600 2 роки тому

    Why DNA containing 6000 nucleotides on transcription and translation to protein contain 1000 amino acids?

    • @charliemcgee7587
      @charliemcgee7587 Рік тому

      Every three nucleotides codes for 1 amino acid. That would mean 2000 amino acids. However after transcription of DNA the mRNA has some sections of bases removed by enzymes. These removed nucleotides are called introns and they dont code for an amino acid

  • @asta_6832
    @asta_6832 6 місяців тому +4

    I’m cooked

  • @winniethepooh8766
    @winniethepooh8766 Рік тому +4

    31:10 this guy violates himself in every video.

  • @katheriner6456
    @katheriner6456 6 місяців тому +5

    A LEVEL BIOLOGY GANGGGGGGGGGGG ASSESMLE