Photosynthesis - Light Dependent Reactions and the Calvin Cycle

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  • Опубликовано: 1 июл 2024
  • This biology video tutorial provides a basic introduction into photosynthesis - the process by which plants use energy from sunlight to convert Carbon Dioxide and Water into Oxygen gas and sugars such as Glucose. Photosynthesis can be broken into two stages: The light dependent reactions and the light independent reactions also known as the Calvin Cycle or dark reactions. In the light dependent reactions, Water is oxidized into Oxygen gas by Photosystem II which transports the electrons in through the electron transport chain inside the thylakoid membrane eventually producing high energy molecules like ATP and NADPH. ATP is produced by the enzyme ATP Synthase in a process called Chemiosmosis very similar to cellular respiration. The Calvin Cycle takes in CO2, ATP, and NADPH to produce G3P which is later used to make sugars like Glucose and Fructose.
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Комментарии • 301

  • @TheOrganicChemistryTutor
    @TheOrganicChemistryTutor  5 месяцев назад +9

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      @hackr5277 5 месяцев назад

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    • @scaravv1876
      @scaravv1876 Год назад +29

      oh wow, I'm here for biology too! I have an exam in the morning and completely forgot about the Calvin cycle

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      @meimunashuaib7434 Год назад

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      @meimunashuaib7434 Год назад

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  • @saurishs
    @saurishs 3 года назад +297

    I don't think the video said this (at least I didn't catch it), but during the conversion of the 5G3P back into 3RuBP, it requires the usage of 3ATP -> 3ADP to receive the phosphate group - this is what makes the net count 9 ATP and not 6 ATP.

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    • @soulofrei643
      @soulofrei643 3 года назад +13

      trust me this vid is all you need to understand what is going on with photosynthesis when you get there, my teacher couldnt make us understand the same content in 2 separate lectures NJEGNJGNJE

    • @anon8116
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    @Zohan8910 3 года назад +11

    ATP Synthesis is probably one of the coolest things I have ever seen. 11:18 Im in awe, biology is so fascinating...

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      jesus this is 8th grade honors bio? This is in my university basic biochemistry class, which is a 3rd year class lmao

  • @Gracelookism
    @Gracelookism Год назад

    By far the most clear video I’ve ever seen. THANK YOU SO MUCH’ (I’ll be repeating this video at least a million more times until I fully understand it)

  • @hunterlord25
    @hunterlord25 24 дня назад +2

    For anyone stumbling about with this specific part; it's 9 ATP/ADP in the summary due to 6 ATP/ADP forming during reduction and 3 ATP/ADP during regeneration.

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  • @methmemelab8819
    @methmemelab8819 4 года назад +40

    Few days ago I was studying cellular respiration and you uploaded that video and right now I have just completed photosynthesis again you uploaded this video. What is exactly happening? 😂😂

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  • @harriesangelomorales1867
    @harriesangelomorales1867 3 года назад +9

    Please note that on the last part it should be 12 Nadp+ instead of 6. Thanks for the video.

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    @macandcheese4138 Месяц назад +2

    bro, the AP exam is TOMORROW thanks for saving my LIFE

  • @markrabiballino1471
    @markrabiballino1471 7 месяцев назад

    This presentation taught me a lot about photosynthesis. And how it it works.. this has a lot of Knowledge to be learn.

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    @SiyandarhFrost 2 месяца назад

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    @vedasree27 5 месяцев назад +1

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    @-krukru-8289 8 месяцев назад

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    @c0j85 6 месяцев назад

    This was very helpful thank you so much ❤

  • @deszu
    @deszu 7 месяцев назад

    my bs bio teacher drew some sh1t picture on the board about light dependent reactions and no one understood a thing, this vid helps so much

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    @enestinadcruze 2 года назад

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    @imenel5710 Месяц назад +1

    God bless you bro this really helped ❤

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    @sarishakumar8955 Год назад

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    @sakumieika Год назад

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    @PritomAhad 3 года назад

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    @m4xxdmg105 3 года назад +2

    This helped a lot for my finals. Gotta say that plant looking kinda buff.

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    @s.h.1991 3 года назад +1

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  • @lukeewert3005
    @lukeewert3005 2 года назад +3

    In the electron transport chain it takes two H2O to produce 2NADPH, but in the Calvin cycle it requires 12 NADPH. If it takes one water to make one NADPH why doesn't the formula call for 12H2O? What happened to the other 6 H2O?

  • @fathesyed8628
    @fathesyed8628 4 года назад +1

    Watching your videos makes it easier for me to understand what the book is talking about lol

  • @realknight9562
    @realknight9562 3 года назад +1

    Do you have anything on angiosperms or germnosperms? Its getting to that time where I've watched my professor's lectures multiple times, asked friends etc and still don't get it

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    @fortnitedababy 8 месяцев назад

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    @bonnypaulus4820 4 года назад

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    @afjejdjenxndnd 7 месяцев назад

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    wow sir it is amazing

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    @bennettegaper4344 2 месяца назад

    Thank you so much!

  • @Peter-vx5yf
    @Peter-vx5yf 3 года назад

    Thanks, this was incredible usefull. :D

  • @saraahmad728
    @saraahmad728 Год назад +1

    Hey i have a question! You say NADP is reduced into NADP+. Wouldn't that be oxidation since your losing an electron?

  • @sird135
    @sird135 Год назад

    Note that there are other enzymes and other compounds involved in these reactions. However, they aren't that important to help you get the GENERAL grasp of the two reactions.

  • @OutsandingGirl12
    @OutsandingGirl12 4 года назад +2

    More on bio please!

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    @habeneyom5749 4 года назад

    U r the best bro

  • @quincyzhang299
    @quincyzhang299 4 года назад +16

    17:44, 12 NADP+ instead of just 6 molecules of it? Everything should be doubled here.

  • @izraneedstoknow377
    @izraneedstoknow377 6 месяцев назад

    So, 3 molecules of CO2 go in at the same time? Or is it one at a time? My notes say that it’s takes 6 turns of the cycle to make 2 G3P-> 1 glucose molecule.

  • @kaleabmehari2648
    @kaleabmehari2648 6 месяцев назад

    Thank you so much 💯🙏🏽🙏🏽🙏🏽🙏🏽

  • @baekjisoo3483
    @baekjisoo3483 Год назад

    Thanks man. 😀

  • @reachristinebucayon4896
    @reachristinebucayon4896 2 года назад

    Hello, Sir. May I ask if you could provide a transcript for this? Thank you very much!

  • @lilithasotondoshe8226
    @lilithasotondoshe8226 4 года назад +1

    thank you

  • @prathamscodingchannel1678
    @prathamscodingchannel1678 6 месяцев назад

    Nice video, but what happened to the phosphate on carbon-1 when biphosphoglycerate was turned into G3P?
    btw, I'm 13.

  • @MeiziVu
    @MeiziVu 2 года назад

    love you!!

  • @user-cd6ur4gq8y
    @user-cd6ur4gq8y 14 дней назад

    what happened to one of the phosphate group on 1,3-phosphoglycerate, after it got converted into glyceraldehyde 3-phosphate?. It would make more sense if it was the 3-phosphoglycerate that got converted into the glyceraldehyde 3-phosphate but, i am a bit confused. help!