Jo Phillips A Level Biology
Jo Phillips A Level Biology
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AS Biology - Transport of carbon dioxide
As Biology - how carbon dioxide is transported around the body from the dissociation of carbonic acid to form hydrogencarbonate ions, and the production of carbaminohaemoglobin. Also explains briefly what the chloride shift is, and how the formation of hydrogen ions causes the dissociation of oxygen from oxyhaemoglobin.
Переглядів: 508

Відео

AS Biology - Bohr Effect
Переглядів 3227 місяців тому
AS Biology, Animal Transport Topic - Bohr Effect. Explanation of the oxygen dissociation curve, why haemoglobin oxygen saturation decreases in the lungs, the idea of cooperative binding and the effect of increasing carbon dioxide concentrations on decreasing haemoglobin's oxygen affinity.
A2 Biology - Crossing over
Переглядів 1,3 тис.2 роки тому
A Level Biology, A2 level. Topic inheritance & Genetics - An explanation of how crossing over can occur during prophase 1 of meiosis and how this produces new allele combinations in the gametes, introducing genetic variation.
AS Biology - Monoclonal Antibodies (The Hybridoma method)
Переглядів 1,2 тис.2 роки тому
AS Biology, Immunity Topic - Description of how monoclonal antibodies (Mabs) are made using the hybridoma method by fusion with myeloma cells to form hybridoma cells. Includes difference between monoclonal and polyclonal antibodies and why it's difficult to produce Mabs.
AS Biology - Phagocytosis
Переглядів 4932 роки тому
AS Biology, Immunity Topic - The process of Phagocytosis by neutrophils. Includes details on opsonins, binding to receptor proteins, formation of phagosome and the digestion by hydrolytic enzymes from the lysosomes. Also looks at the difference in appearance of neutrophils, macrophages and lymphocytes.
AS Biology - Mutation
Переглядів 5432 роки тому
AS Biology, Genetics Topic - Mutation. Explanation of how changes to DNA can affect the primary structure. Includes insertion and deletion mutations and an explanation of frame shift. And the three different substitution mutations - non-sense mutation, mis-sense mutation and silent mutation
AS Biology - Translation
Переглядів 8552 роки тому
AS Biology, Genetics Topic - Translation. Explanation the second part of protein synthesis. Amino acid activation, structure of transfer RNA (tRNA) and how the tRNA bring amino acids to the ribosome to form a polypeptide chain.
AS Biology - Transcription
Переглядів 9822 роки тому
AS Biology, Genetics Topic - Transcription. Explanation the first part of protein synthesis, breaking it down into stages of initiation, elongation and termination.
A2 Biology - Muscle Structure (Actin and Myosin)
Переглядів 2,1 тис.2 роки тому
A2 Biology - Coordination topic. Description of the structure of striated muscle, including the sarcolemma and multinucleate nature. Composition of myofibrils with myosin and actin filaments. Comparison of relaxed and contracted myofibrils, comparing lengths of sarcomere, H-zone, A-Band and I-Band.
A2 Biology - Microarrays
Переглядів 4,8 тис.2 роки тому
A2 Biology - Genetic Technology topic. Description of how microarrays can be used to compare gene expression and is used in genmoe analysis. Covers use of fluorescent tags, hybridisation, use of reverse transcriptase to produce cDNA.
AS Biology - Translocation
Переглядів 1,7 тис.2 роки тому
AS Biology, Plant transport Topic - Translocation. Explanation of sources and sinks and how assimilates move by mass flow through the phloem. Includes details of active loading in the companion cell, using proton pumps and cotransporters.
AS Biology - The genetic code
Переглядів 6 тис.2 роки тому
AS Biology, Genetics Topic - The genetic code. Explanation of how codons of mRNA code for specific amino acids, using a non-overlapping, degenerate code.
AS Biology - DNA replication
Переглядів 3,3 тис.2 роки тому
AS Biology - Cell Division topic. Description of DNA replication, including the role of DNA helicase, DNA polymerase and DNA ligase (to join okasaki fragments).
AS Biology - Nucleic acids (The structure of DNA and RNA)
Переглядів 5372 роки тому
AS Biology - Cell Division topic. Description of the structure of nucleotides, including ATP, base paring rules and formation of nucleic acids.
AS Biology - Genetic technology and transferring genes
Переглядів 1,6 тис.2 роки тому
AS Biology - Genetic Technology topic. Overview of gene transfer and details about obtaining genes. Synthesis using free nucleotides, reverse transcription and use of restriction endonuclease enzymes. Details of using sticky ends to insert DNA into a plasmid and obtain recombinant DNA.
A2 Biology - DNA and evolutionary relationships
Переглядів 1,6 тис.2 роки тому
A2 Biology - DNA and evolutionary relationships
AS Biology - The Cell Cycle and Mitosis
Переглядів 6742 роки тому
AS Biology - The Cell Cycle and Mitosis
AS Biology - The role of mitosis in stem cells and cancer
Переглядів 9262 роки тому
AS Biology - The role of mitosis in stem cells and cancer
AS Biology - Enzyme inhibitors
Переглядів 7 тис.2 роки тому
AS Biology - Enzyme inhibitors
A2 Biology - Inbreeding and hybridisation
Переглядів 6 тис.2 роки тому
A2 Biology - Inbreeding and hybridisation
AS Biology - The Michaelis-Menten Constant (Km)
Переглядів 59 тис.2 роки тому
AS Biology - The Michaelis-Menten Constant (Km)
AS Biology - Chromosome structure
Переглядів 7382 роки тому
AS Biology - Chromosome structure
A2 Biology - Genetic drift
Переглядів 2,1 тис.2 роки тому
A2 Biology - Genetic drift
AS Biology - Evolution topic. Hardy-Weinberg Equilibrium
Переглядів 1 тис.3 роки тому
AS Biology - Evolution topic. Hardy-Weinberg Equilibrium
AS Biology. Factors that affect enzyme activity
Переглядів 6833 роки тому
AS Biology. Factors that affect enzyme activity
AS Biology - Enzyme action
Переглядів 5393 роки тому
AS Biology - Enzyme action
AS Biology - Cells Topic. Osmosis and the effect on animal and plant cells
Переглядів 7633 роки тому
AS Biology - Cells Topic. Osmosis and the effect on animal and plant cells
AS Biology - Active transport, Endocytosis and Exocytosis
Переглядів 1 тис.3 роки тому
AS Biology - Active transport, Endocytosis and Exocytosis
A2 Biology -Types of Natural Selection
Переглядів 2 тис.3 роки тому
A2 Biology -Types of Natural Selection
A2 Biology - Natural Selection (selection pressures)
Переглядів 2,6 тис.3 роки тому
A2 Biology - Natural Selection (selection pressures)

КОМЕНТАРІ

  • @SumiyaChowdhury-b8g
    @SumiyaChowdhury-b8g День тому

    Thank You Ma'am. This is really helpful.

  • @maedehmirzaei5737
    @maedehmirzaei5737 2 дні тому

    Thank you, it was really useful ❤️

  • @0chulorngozi851
    @0chulorngozi851 5 днів тому

    Thank you so much❤❤❤❤

  • @pramiti4485
    @pramiti4485 7 днів тому

    lovely explanation thank you very much!

  • @eviebee4
    @eviebee4 7 днів тому

    Thank you so much!

  • @shahuudii99
    @shahuudii99 8 днів тому

    super high yield , thanks!

  • @Sami-qo9bz
    @Sami-qo9bz 9 днів тому

    this was such a good video, i couldnt find one that simplified it enough to make it understandable but still kept the keywords. This was perfectly explained and i get it now. Thank you so so so much!

  • @tamerzaghlol9461
    @tamerzaghlol9461 16 днів тому

    Hello.. Are you going to share a vid about forensic science?

  • @tamerzaghlol9461
    @tamerzaghlol9461 20 днів тому

    I don’t know how to thank you enough!

  • @tamerzaghlol9461
    @tamerzaghlol9461 20 днів тому

    Life saver, Absolutely!

  • @tamerzaghlol9461
    @tamerzaghlol9461 21 день тому

    I appreciate your hard work.. thanks

  • @pluvto4649
    @pluvto4649 23 дні тому

    Wow

  • @cheri-u1j
    @cheri-u1j 27 днів тому

    I went through all my resources and still couldn’t understand the concept.Thanks to you,i understood the entire procedure within 12 minutes.May god bless you❤️!

  • @AkarshanAswath
    @AkarshanAswath 28 днів тому

    Amazing!

  • @smitchandrakar4652
    @smitchandrakar4652 28 днів тому

    Good teacher. Thamks 😊

  • @ObedRuto-mm9wb
    @ObedRuto-mm9wb Місяць тому

    The space in which water pass through in apoplast is called

  • @ayushii454
    @ayushii454 Місяць тому

    ❤❤🙏🏼

  • @AndrewPatterson-s5x
    @AndrewPatterson-s5x Місяць тому

    Brill,

  • @ConceptualMedico
    @ConceptualMedico Місяць тому

    Appreciated your efforts ❤️‍🔥❤️‍🔥

  • @isicheigabby
    @isicheigabby Місяць тому

    lovely and explicit.. thanks

  • @nusaibamahbub1965
    @nusaibamahbub1965 Місяць тому

    Short, simple and clear..all in one thxxx alott

  • @roaahmedsalaheldin
    @roaahmedsalaheldin Місяць тому

    Thank you for your effortttt❤❤❤❤

  • @roaahmedsalaheldin
    @roaahmedsalaheldin Місяць тому

    Thank you sooooooooooooooooooo much ❤❤❤❤

  • @roaahmedsalaheldin
    @roaahmedsalaheldin Місяць тому

    Thank you so much ❤❤

  • @sisterplayz7291
    @sisterplayz7291 Місяць тому

    Mam you r amazing better than the ssc II book b/c you made it clear the 2 pathway of watwr and how does its importance.

  • @justinmanzo3945
    @justinmanzo3945 Місяць тому

    thank you very helpful, can you do this to save a variety of corn? keep growing inbreed lines while also growing the f1 hybrid, then inbreed the new f1 line ?

  • @Cottonballoon
    @Cottonballoon Місяць тому

    Thank you this helped a lot 😊

  • @mychemicalreaction00
    @mychemicalreaction00 Місяць тому

    BEST EXPLANATION SO FARRR

  • @LpoKF
    @LpoKF 2 місяці тому

    I've watched dozens of videos but all of them pale in comparison to yours Thank you 💛✨️

  • @june_main
    @june_main 2 місяці тому

    i know im late but i love your way of explaining. thank you!!

  • @KiranChoudhry-b2y
    @KiranChoudhry-b2y 2 місяці тому

    Please more topic for related to mdcat

  • @Zurum006
    @Zurum006 2 місяці тому

    Good job ❤

  • @SofiasBio
    @SofiasBio 3 місяці тому

    Haha short and sweet. I LOVED that you explained dominant vs recessive genes in terms of the functional vs non-functional enzymes they encode. This was never clear to me in my high school biology classes and it didn't seem obvious to my professors either "what makes a gene dominant or recessive?". Of course, other mechanisms could be involved but I'm glad you indeed kept it short and simple. Thanks!

  • @NuzatSundke
    @NuzatSundke 4 місяці тому

    Hello ma'am, Thank you for this great video and being so kind to the students by explaining everything so beautifully. QUERY- At 5.45, you said that water enters the root through diffusion. This has confused me as in the texts we follow, it says that water enters the root through osmosis. Request you to please clear this doubt. Thank you.

  • @sajidabenmbarek
    @sajidabenmbarek 4 місяці тому

    it is a shame this isn't what comes up first when looking for A Level B biology stuff because this channel is so underrated compared to other bio a level channels, especially for visual learners, the fact you draw everything out instead of using static images really really helps, thank you so much.

  • @shagunlalotra7246
    @shagunlalotra7246 4 місяці тому

    You are a great teacher 🫶🏼🫶🏼

  • @msyubibi
    @msyubibi 4 місяці тому

    u are a life saver

  • @HedyieMashhadi
    @HedyieMashhadi 4 місяці тому

    educative and informative love it ❤

  • @phaethon6145
    @phaethon6145 4 місяці тому

    Omg I can’t tell how much this helped! Thank you!!

  • @bonniexwony
    @bonniexwony 4 місяці тому

    amazing video, thank you ! I have a question though, how can abscisic acid can open and close the stomata ? like its the same chemical but has 2 different effects. do we simply choose which one would occur based on the information given ? (Ex if hot and dry climate then say it closes etc)

  • @panko456
    @panko456 4 місяці тому

    This deserves more likes and views, thank you so much.

  • @detoxsoulrrific593
    @detoxsoulrrific593 4 місяці тому

    Best explanation EVER!

  • @studentonelinda
    @studentonelinda 4 місяці тому

    thank you so much this was explained really well

  • @Fatima_567
    @Fatima_567 5 місяців тому

    thank youuuuu

  • @Joklam-vs4gj
    @Joklam-vs4gj 5 місяців тому

    What does km stand for

    • @th33_makamae
      @th33_makamae 5 місяців тому

      It stands for Michaelis-mentem

  • @Joklam-vs4gj
    @Joklam-vs4gj 5 місяців тому

    What does km stand for

    • @th33_makamae
      @th33_makamae 5 місяців тому

      It stands for Michaelis-mentem. You aren't required to know that though

    • @arsenic4920
      @arsenic4920 4 місяці тому

      kilometer

  • @chrys9244
    @chrys9244 5 місяців тому

    I'm so grateful for this video, I just wished I'd have found your channel before - my exam is tomorrow 😅

  • @qasimali7898
    @qasimali7898 5 місяців тому

    Is this the complete chapter I feel like 2 videos are two less

  • @AmusedAirboat-mc4xm
    @AmusedAirboat-mc4xm 5 місяців тому

    You are a life saver 💗

  • @shn_500
    @shn_500 5 місяців тому

    thank u soooooooooooo much for the explanation it was soooooooooo good!!!!!!!!