Krebs / citric acid cycle | Cellular respiration | Biology | Khan Academy

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  • Опубликовано: 10 дек 2009
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    Overview of the Krebs or Citric Acid Cycle
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Комментарии • 2 тыс.

  • @sarasamir2113
    @sarasamir2113 8 лет назад +4038

    Students around the world should just pay their tuition fees to this guy.

  • @annagrins9486
    @annagrins9486 5 лет назад +2047

    good luck on your tests homies

  • @uruguay704
    @uruguay704 9 лет назад +1297

    This guys a genius, i couldn't understand this in 2 weeks of Bio class and he just made it so easy in 17 minutes... Thanks man!

    • @sovereigngeniusmusicmyster2230
      @sovereigngeniusmusicmyster2230 6 лет назад

      pablo nunez why did you send me this i want Mathematics.

    • @lilykatr0354
      @lilykatr0354 5 лет назад +39

      @@armaansamirizvi3354 or he was just confused, like me, a straight A (female) student. My bio teacher is the worst teacher I've ever had, he yells at us and drills us in front of the whole class and all of our quizzes are test grades. If that person had a bad teacher its not entirely their fault for being confused.

    • @mayahall3625
      @mayahall3625 5 лет назад +2

      @@lilykatr0354 same

    • @user-zo7vc8em1t
      @user-zo7vc8em1t 5 лет назад

      oh l understand it within 2 classes!

    • @DivineSeaDragon
      @DivineSeaDragon 4 года назад

      thisbich isn’tspontanious this jacksfilms fan is Tryna flex

  • @HL-iw1du
    @HL-iw1du 7 лет назад +898

    They don't teach you this on the streets.

    • @MadnessYouSay
      @MadnessYouSay 5 лет назад +10

      shocker

    • @khaledaltahhan4092
      @khaledaltahhan4092 5 лет назад +46

      well they won't ask you about this in the streets

    • @aayushbajaj2260
      @aayushbajaj2260 4 года назад +2

      phoebe?

    • @williamho1879
      @williamho1879 4 года назад +1

      yes, watch film on bed is more comfortable

    • @quagapp
      @quagapp 4 года назад +13

      Go up to a beautiful young woman (or man or whatever as the case may be) and ask her to come for a coffee while you explain the latest on the Krebs cycle!

  • @irun_mon
    @irun_mon 8 лет назад +1445

    I know some of those words.

    • @hokkieninhongkong3510
      @hokkieninhongkong3510 7 лет назад +18

      Why do you get so many likes?

    • @LadyAntonette
      @LadyAntonette 7 лет назад +8

      +Masterpiece Kingswood cuz he uses different colours 😊😊😊

    • @b.alyousef1362
      @b.alyousef1362 7 лет назад +9

      he is talking about Irun Mon

    • @LadyAntonette
      @LadyAntonette 7 лет назад +3

      +bader alyousef ohhhhhhhh 🙈

    • @kerrymq5996
      @kerrymq5996 5 лет назад +4

      This full-on made me laugh! Glad I’m not alone, it’s not sinking in yet 🙃

  • @WanderingYankee
    @WanderingYankee 7 лет назад +403

    Maybe we'll put a happy little ADP right over here. Remember, this is your world, you can respirate any way you like.

    • @danawhite8315
      @danawhite8315 6 лет назад +10

      No one comments back ??...well I'm just gonna a leave a simple Bob Ross is love Bob Ross is life here

    • @pomegranatehoneydews
      @pomegranatehoneydews 6 лет назад +1

      bless ur soul young lad

    • @sukieyakie
      @sukieyakie 5 лет назад +2

      i see you're a man of culture

    • @jacob2359
      @jacob2359 5 лет назад +9

      Let's just take that glucose there, wash the pyruvate in enzyme, and beat the devil out of it!

    • @rebeccadavenport6103
      @rebeccadavenport6103 5 лет назад

      hahahaha

  • @anida837
    @anida837 7 лет назад +396

    2:13 = My face tying to follow along to my professor in class

    • @mohammedalzahrani6376
      @mohammedalzahrani6376 7 лет назад +16

      that's quite funny.

    • @sarahdarwiche4965
      @sarahdarwiche4965 6 лет назад +5

      Spencer Lindgren LOL you just made my day

    • @nana____fox
      @nana____fox 5 лет назад

      ohmygod

    • @samuelfauteux6735
      @samuelfauteux6735 5 лет назад +4

      I do not regret the time investment it took me to get this joke. It was a solid L-O-L out of 5

    • @ALMLSAN
      @ALMLSAN 4 года назад +3

      haha prime example of a distraction

  • @antoniolelis5829
    @antoniolelis5829 3 года назад +152

    It's amazing how 11 years later this is still one of the best videos available about the krebs cycle!! Thank you!! Be sure that many brazilians students have been helped in these 17 minutes!!

    • @sarangave
      @sarangave 8 месяцев назад

      still does!! 🧚🏻‍♂️

    • @B2L2007
      @B2L2007 3 месяца назад +1

      @@sarangave HERE 2024

  • @CHAOS80120
    @CHAOS80120 8 лет назад +271

    He's better than any of my teachers.

  • @gypsygrlisu29
    @gypsygrlisu29 8 лет назад +192

    It took my professor two hours to explain what you just explained in five minutes. Thank You

    • @gypsygrlisu29
      @gypsygrlisu29 7 лет назад +34

      I wasn't talking about the entire video. Just the part I needed.

    • @kshitizsinha9170
      @kshitizsinha9170 7 лет назад

      lmao

    • @chayanka_kaushik
      @chayanka_kaushik 6 лет назад +1

      17mins*

    • @bruhe8895
      @bruhe8895 4 года назад +5

      I think they just take a long time to explain it just to get it stuck in your head, but that doesn't work on me tho

  • @aprilcamillo2024
    @aprilcamillo2024 8 лет назад +470

    I. LOVE. YOU. Really. These are THE BEST teaching videos ever. I'm in grad school & killing myself over trying to read textbook & follow powerpoint based lectures. OMG. Your channel is a lifesaver! I'm telling all of my classmates about it!!!!!! I would seriously have your child.

    • @dexistence19
      @dexistence19 8 лет назад +19

      +April Camillo Lmao best comment ever. But I definitely agree, these videos are unbelievably helpful.

    • @ypogoogi3278
      @ypogoogi3278 8 лет назад +9

      ur learning this in grad school or just reviewing it cause if ur just learning than i definitely shouldn't be learning this :(

    • @josuealberto9096
      @josuealberto9096 7 лет назад +32

      "I would seriously have your child"--real Freak! lmao!

    • @aprilcamillo2024
      @aprilcamillo2024 7 лет назад +1

      Ypogo Ogi I am having to relearn! I am too old for it!

    • @cindycorrales9838
      @cindycorrales9838 7 лет назад +6

      I totally agree!! I've been reading my PowerPoint repeatedly and nothing was clicking. Watched this once and BOOM! I get it now.

  • @stuartlenk9436
    @stuartlenk9436 3 года назад +182

    Watched this video in high school for biology and now I’m back years later watching it again for college bio 😂

    • @eriasaine4911
      @eriasaine4911 2 года назад +3

      Do you want to tell me you forgot it already? Hope that won't happen to me!😄😄

    • @ayanmahapatra6262
      @ayanmahapatra6262 2 года назад

      What degree you're pursuing currently?

    • @neginmoosavi3618
      @neginmoosavi3618 2 года назад

      :))) good luck

    • @3o737
      @3o737 2 года назад

      @@eriasaine4911 Trust me you're going to forget it too 😬 Unless you revise it everyday of course

    • @CupcakeRain
      @CupcakeRain 2 года назад +1

      @@eriasaine4911 i forget it like every other month lol

  • @richardortiz9561
    @richardortiz9561 8 лет назад +168

    The guy who is narrating must be a fucking genius!! He knows so much on so many diverse topics: bio, chem, physics, calculus... What degree(s) does this guy have?! What is his actual career? He must be some elite doctor or professor or something right?!

    • @aminrosli9744
      @aminrosli9744 8 лет назад +1

      Richard Ortiz if u want hear his voice skip to 2:00

    • @dexistence19
      @dexistence19 8 лет назад +43

      +Amin Rosli What are you on about? He's talking the whole video... Plus, your reply was completely unrelated to Richard's comment...

    • @midgetking101
      @midgetking101 8 лет назад +21

      +Richard Ortiz His videos are relatively shallow. They only cover the trivialities, namely in his biology and chemistry videos. Additionally, some of the organic chem videos and biology videos are done by other narrators, people who are more specialized in their field. That doesn't mean he is unaware of the minutiae of each field, it just doesn't seem that way from his videos.

    • @superboidavid5166
      @superboidavid5166 7 лет назад +4

      this is true. Personally, this guy's videos help me on an introductory level to the topic rather than an actual learning and processing video. Still helps out sooo much though

    • @jamminout7671
      @jamminout7671 7 лет назад

      Richard Ortiz I mean to be frank this stuff is just basic curriculum you could have done in high school but just simplified for us because he is a teacher

  • @juliagonzalez8290
    @juliagonzalez8290 Год назад +42

    This is why I love Khan Academy, these videos have helped me since I was learning geometry in middle school. Now taking my first Bio class as a freshman in college and I can always depend on these videos to clear up my confusion.

  • @chevonnefx
    @chevonnefx 6 лет назад +8

    For someone who learns kinetically and visually, your videos really help. Understood this in 17 mins whereas I was KILLING myself trying to learn it before hand. Thank you so much

  • @donutstix22
    @donutstix22 7 лет назад +52

    I wish I would've seen this a month ago when it really mattered

  • @michaelalejandro6056
    @michaelalejandro6056 7 лет назад +96

    omg. this makes sense. I came home from my college class and I was so mind fucked, I couldn't gain anything. thank you so much!

    • @miru8801
      @miru8801 7 лет назад +3

      I have a question, when do you study all of this in the USA? Only in college or also at school?

    • @michaelalejandro6056
      @michaelalejandro6056 7 лет назад +7

      Miru Bauer I'm taking it in college. Its an intro to biology but if you want you can take Ap biology in high school. If you do take Ap bio in high school it won't count as a class when you apply to med school, so you'll still need to take it again.

    • @miru8801
      @miru8801 7 лет назад +7

      michael meza thanks! I was studying this for the IB

    • @michaelalejandro6056
      @michaelalejandro6056 7 лет назад +3

      👍

    • @c1aniel
      @c1aniel 7 лет назад +5

      michael meza college? I study this shit at high school

  • @twothirdsostrich
    @twothirdsostrich 9 лет назад +25

    May God bless you and all your future generations to come, this video is saving my life in Biology.

  • @JoseHernandez-zh5tu
    @JoseHernandez-zh5tu 9 лет назад +8

    I love you Khan Academy! Dont ever start charging people for your wonderful service. You help so many students.

  • @miancu3
    @miancu3 6 лет назад +2

    A palpable sense of relief comes over me when I recognize your voice in the Khan videos. “It’s the guy that can actually explain it in a coherent manner”.

  • @trojan88tm
    @trojan88tm 9 лет назад +71

    FYI the NADH produces 2.5 ATP and the FADH2's produce 1.5 ATP each. except for the NADH's produced from glycolysis which can produce either 2.5 or 1.5 depending on the shuttle used to get into the Mitochondria. which means a total of 30-32 ATP per glucose molecule.

    • @viveksinghchauhan7496
      @viveksinghchauhan7496 5 лет назад +6

      It has been a long debate since long.. regarding this .So nothing is much specific .

    • @TheTypek81
      @TheTypek81 4 года назад

      thank you, i was about to comment it as well

    • @sheikahchick9861
      @sheikahchick9861 3 года назад

      Is this saying that the very action of picking up the electrons alone generates ATP?

    • @ugochimoneke5982
      @ugochimoneke5982 Год назад

      little miss know it all

  • @HeartofGold16
    @HeartofGold16 6 лет назад +2

    I have used Khan's videos for Algebra, Chemistry, Statistics and Biology. Now I am back using his videos for Microbiology and he always explains everything so that even someone like me can actually understand the material. I love him and I will probably be back for another subject down the road.

  • @jazminchavez5814
    @jazminchavez5814 3 года назад +1

    Thanks to this video I was finally able to understand how Krebs cycle works!!!

  • @johnjohnson201
    @johnjohnson201 4 года назад +16

    It’s ridiculous how many times I’ve had to re-learn this. I always forget, and will never use this ANYWHERE in my career, so idk why it keeps getting jammed down my throat! 🦔

  • @nystagmus
    @nystagmus 10 лет назад +3

    so great that you actually mention the whole point of these reactions. when i was in medical school, i was just memorizing steps and not knowing the purpose of the reaction. wish you were my teacher back then! thanks!

  • @abdullah4108
    @abdullah4108 7 лет назад +16

    Some FAD gets REDUCED to FADH2 not oxidized 8:30

  • @mllo2003
    @mllo2003 7 лет назад +2

    The best explanation of the Krebs cycle I've seen so far. Thank you for making it much clearer for us!

  • @jchxxh
    @jchxxh 9 лет назад +114

    crying because I have to memorize all the enzymes and names of the intermediates for the krebs cycle for my college biochem class :(((((((((

    • @mustafabale24
      @mustafabale24 5 лет назад +5

      Well you're done with them, now it's my turn :'(

    • @sachinanand8742
      @sachinanand8742 5 лет назад +9

      well i have to do the same and im only 16 😭

    • @JasonVaysberg
      @JasonVaysberg 4 года назад +2

      I gotta know the structures too and be able to drawing the electrons moving around.

    • @olddirtycracker
      @olddirtycracker 4 года назад

      Don't cry, dry your eyes. Here comes your mother with those two little guys.

    • @languageartsgrade
      @languageartsgrade 4 года назад +4

      I have a bio midterm and a few bio tests in less than a week and I barley understand anything in bio from the beginning.. I really need help.. ):

  • @huntermaui
    @huntermaui 11 лет назад +4

    I'm not going to say that I couldnt learn this with out Sal, but Khan academy is a invaluable resource to solidify the information. Thanks for being awesome Sal!

  • @boxeriain
    @boxeriain 8 лет назад +12

    he's the finest teacher on the planet!

  • @DianaFakhoury14
    @DianaFakhoury14 21 день назад

    i was trying to figure this out for 2 hours until i watched this and understood it right away. Khan academy is a blessing from God

  • @10Alan17
    @10Alan17 9 лет назад +41

    5:15 where Kreb's cycle info starts

  • @ayebalethomas3035
    @ayebalethomas3035 6 лет назад +2

    These are the best explanations that any one studying could never wish to live without am so glad to be part of this team

  • @kamyx15
    @kamyx15 9 лет назад +5

    best video about glycolysis and krebs cycle out there

  • @michaelchrisborn
    @michaelchrisborn Год назад +1

    As a Papua New Guinean student, this video helped me a lot in my studies khan academy is one of the best and the simplest website for learning.

  • @jenniferzamora5366
    @jenniferzamora5366 6 лет назад +2

    omg i am so grateful people like you do these kinds of things, i have been struggling for days trying to understand this for HOURS from my textbook and powerpoint but you made it so clear and easy to understand in less than 18 mins wow thank you bless you

  • @bdogg20101
    @bdogg20101 6 лет назад +11

    Phenomenal. All these years taking biology, I wish I seen this video before med school. It makes everything so much easier.

  • @iGo0gIe
    @iGo0gIe 9 лет назад +37

    That moment when not a single word was understood..

    • @hcshenoy
      @hcshenoy 9 лет назад +18

      iGo0gIe if u don't understand his explanation, you won't understand any other. Sal Khan, the best teacher in the world.

    • @mikeocampo6436
      @mikeocampo6436 4 года назад +1

      Chetan Shenoy disagree. Everyone learns different.

  • @gmanbyah328
    @gmanbyah328 11 лет назад +2

    You've saved my life multiple times, and for that I thank you.

  • @cbpuzzle
    @cbpuzzle 2 года назад

    Anyone learning this today has NO IDEA how good they have it with YT. Imagine learning this in the 1990s in a lecture hall of 400+, sitting 60 feet away from a chalk board, from a TA that learned English 6 months ago, ONCE, without rewind or replay, having to scribble notes to maybe memorize it for an exam in 3 months.

  • @jacobogle8784
    @jacobogle8784 10 лет назад +5

    NADH and FADH2 are both coenzymes that shuttle electrons. NAD+ picks up 2e- and is reduced to NADH. FAD becomes FADH2 because it also picks up 2e- and 2H+ ions. ADP (adenosine diphospate) picks up a phosphate group during substrate-level phosphorylation, where ADP enters into an enzyme along with a substrate and the enzyme transfers a phosphate group to ADP, thus changing it into ATP (adenosine triphosphate). The prefixes in ADP and ATP tell how many phosphate groups they have; DIphosphate (2), TRIphosphate (3). I hope that helped some of you, I'm no teacher by any means but i hope this clarifies everything, and I also hope my spelling is correct.

  • @MagentaFerret
    @MagentaFerret 9 лет назад +81

    1.25 speed is easier

    • @user-cv5rb5cj1y
      @user-cv5rb5cj1y 9 лет назад +5

      Martin Sun try 2

    • @shokresistant123
      @shokresistant123 9 лет назад +3

      Pressure CHALLENGE ACEPTED

    • @nygeek6471
      @nygeek6471 9 лет назад +2

      Martin Sun I thought the videos were purposely slowed down? You mean 1.5 isn't the default speed?

    • @dexistence19
      @dexistence19 8 лет назад

      +nygeek64 Obviously not? :P

    • @nygeek6471
      @nygeek6471 8 лет назад

      Lol it was sarcasm :D dexistence19

  • @henryhancockhenry542
    @henryhancockhenry542 3 года назад +2

    I have a test on this tomorrow and because of my remote learning, I've spent 3 days learning about it over 2 weeks. This video alone probably just boosted my grade 10%

  • @LeahInTheRye
    @LeahInTheRye 11 лет назад +1

    I can't thank you enough! I've been studying this all day and it just didn't make sense, but now it does. I've got my final Biology exam tomorrow (I'm first a year Biology student), and this has saved me. Thank you, once again. Great video.

  • @runenoobnak
    @runenoobnak 11 лет назад +8

    For those wondering about the exact number of ATP produced, it varies from 36-38. Remember the two NADH produced in glycolysis? Because they cannot enter the mitochondria, they send their electrons through to either NAD+ or FAD+. Because FADH2 makes 2 ATP each, and NADH makes 3 ATP each, the ATP production goes from 4-6, which are added to the 32 already made.

  • @107cindyremsangpuii4
    @107cindyremsangpuii4 5 лет назад +4

    Awwww finally😢😢 i couldn't explain how grateful I am for this video. Thank you so so so much Khan Academy. It helped me a lot. Thanking you wholeheartedly.

  • @stefanyadoo
    @stefanyadoo 10 лет назад +1

    Thank you so much for your videos! Because of you, I actually understand concepts that seemed so daunting and confusing.

  • @emilyburtnik4716
    @emilyburtnik4716 8 лет назад

    wow! this an amazing detailed yet simple explanation. really appreciate how you compare to text book and tie everything together to make sense.

  • @jessemarthaller7647
    @jessemarthaller7647 9 лет назад +5

    Man this is awesome! Nice work!

  • @f0rever1
    @f0rever1 9 лет назад +6

    THANK YOU SO MUCH KHAN ACADEMY! I learned the Citric Acid Cycle because of this video.

    • @Riasat202
      @Riasat202 9 лет назад +3

      Wait till you have to learn what all the intermediates actually look like!

  • @MsTeaBayb
    @MsTeaBayb 10 лет назад +1

    I dont know what i would do without these videos ! Im definately going to pass my tests with this info! Makes it so much easier to understand thank you!

    • @hgm8337
      @hgm8337 4 года назад

      LilBaby it’s definitely not a spelling test I hope?

  • @lamgieyip9214
    @lamgieyip9214 6 лет назад +1

    U r a genius, I have some accident and I need to stay at home for a period of time. And while i was worrying about catching up with my studies, I found this channel and the videos help me in understanding the things I can't understand in textbook. U saved me, seriously

  • @kaitlynmarie6701
    @kaitlynmarie6701 7 лет назад +22

    i have a test on this tomorrow yayyy

    • @shruti8004
      @shruti8004 7 лет назад

      Good luck 👍

    • @TheBrownNinjaHD
      @TheBrownNinjaHD 7 лет назад +5

      you're hot

    • @ethanpaul878
      @ethanpaul878 6 лет назад

      ayyyy 10 months in the future I have a test tomorrow too Yayyyy

    • @Litzer87
      @Litzer87 5 лет назад

      yooo i have it tomorrow too. eksetit

  • @matthe3234
    @matthe3234 4 года назад +27

    Okay so you're telling me that my body can make its own citric acid? So lifetime supply of OJ then??

    • @sibby6186
      @sibby6186 4 года назад

      citric acid is not vitamin c

    • @sua6887
      @sua6887 3 года назад +2

      @@sibby6186 joke

  • @TrelosLikos
    @TrelosLikos 10 лет назад

    Thanks so much ! This video explained it better in 17 minutes than my Biochem professor did in 1 hour ! Much appreciated !

  • @EminentlyEms
    @EminentlyEms 11 лет назад

    Thank you VERY much! Our teacher just threw a detailed picture up via the projector and rambled on about it without any visual simplifications. What you've just highlighted is all we need to learn. Thanks again!

  • @jjollie4334
    @jjollie4334 5 лет назад +4

    I passed chemistry in high school because of this channel!

  • @arsallansiddiqui9106
    @arsallansiddiqui9106 10 лет назад +7

    Great Video ! Your Voice is so Soothing ! haha not to be creepy or anything lol

  • @ludwighurtado
    @ludwighurtado 11 лет назад +2

    I'm more amazed by your ability to write so neatly !

  • @sarahiosman
    @sarahiosman 4 года назад

    This guy is actually amazing don’t know what I’d do without him

  • @aksmr2
    @aksmr2 8 лет назад +5

    Acetyl-CoA is NOT a two carbon compound, however, the acyl *group* attached to the thiol group on coenzyme A is.

  • @loudisloud2226
    @loudisloud2226 7 лет назад +4

    8:30 FAD+ gets reduced into FADH2. Just a note.

    • @danielray3954
      @danielray3954 7 лет назад

      Loud is Loud wrong. FAD is reduced into FADH2

  • @ralphnicolailatorena1151
    @ralphnicolailatorena1151 3 года назад +1

    Thank you for making everything simply detailed.

  • @shallowteresa
    @shallowteresa 7 лет назад

    I love how you explain all of this in a language I understand... If only all prof's could explain in this way.

  • @MichaelHarrisIreland
    @MichaelHarrisIreland 10 лет назад +5

    Tks for the video, such easy learning, just for curiosity in my case

    • @RPM11111
      @RPM11111 10 лет назад +19

      "easy learning"???
      I need a brain transplant!

    • @Goreuncle
      @Goreuncle 9 лет назад +12

      RPM11111
      LOL. No, what you need is more ATP!

  • @mitchellhura9006
    @mitchellhura9006 10 лет назад +3

    Thank you. So much. Currently taking AP Biology right now and hanging on a string.. So in the Citric Acid Cycle, how does NAD+ become NADH, FAD to FADH, and ADP to ATP?

  • @mariammoaz4781
    @mariammoaz4781 5 лет назад +1

    Thank you so much for making each and every complicated topic an easy one . Lots of respect and appreciation to you

  • @TerroMarine
    @TerroMarine 11 лет назад

    This was great. Explaining the big picture before delving into the details is the best approach to teaching, and I find that many textbooks do not use that.

  • @jacobswolfgirl112
    @jacobswolfgirl112 8 лет назад +10

    Hey, just noticed and I was a bit confused, I might be misunderstanding the way you said it but yeah.
    You said that FAD gets OXIDISED to FADH, wouldn't it be known as reduction since it's gaining an electron?

    • @shanikhan00
      @shanikhan00 8 лет назад +3

      he meant reduced

    • @jacobswolfgirl112
      @jacobswolfgirl112 8 лет назад +5

      Yeah I was assuming so, just wanted to let him know in case others got confused.

  • @henrywhitmore4353
    @henrywhitmore4353 8 лет назад +5

    Bozeman Science really explains this topic well...

  • @Kwilliams8207
    @Kwilliams8207 7 лет назад

    This is exactly what I needed to prepare for my exam next week. Thank you for the detail explanation!

  • @muhammadsheeha8738
    @muhammadsheeha8738 7 лет назад +1

    What I loved about this video is the handwriting and drawing.. it is much clearer than any others on RUclips

  • @a-lake-y
    @a-lake-y 9 лет назад +40

    NADH makes 2.5 ATP and FADH2 makes 1.5 ATP

    • @jasmeen1990
      @jasmeen1990 9 лет назад +4

      NADH produces 3 atp and FADH2 produces 2

    • @st0nedg0at
      @st0nedg0at 8 лет назад +4

      +Yasmeen Yasmeena like he says, this is the case in a theoretical perfect cell. However, even after billions of years of evolution, cells are not perfect and energy is lost to entropy. It isn't exact, but 2.5 ATP per NADH and 1.5 ATP per FADH2 is good shorthand.

    • @devanhalton3377
      @devanhalton3377 6 лет назад

      NADH produces 2.5 atp and FADH2 produces 1.5 atp to account for 32 total ATP, he just rounds up.

    • @itmademesignup9508
      @itmademesignup9508 6 лет назад +1

      Devan Halton Incorrect. They produce 3 and 2, respectively in a perfect cell, as he mentions. In reality you get a lower return for a variety reasons, including proton (H+) leak from the mitochondrial matrix. You're just stating the assumed average.

    • @sarahr.khalifeh1406
      @sarahr.khalifeh1406 6 лет назад

      Alan Blakely it's ussually NADH produces 3 ATP and FADH2 produces 2 ATP molecules don't puzzle your mind

  • @TheNoHAnthony
    @TheNoHAnthony 9 лет назад +15

    2:20 my face when I study bio

  • @alyssa-ui5yh
    @alyssa-ui5yh 3 года назад +1

    i am inlove with your voice and every word that goes out of your mouth

  • @zipperteedee
    @zipperteedee 5 лет назад +2

    I LOVE YOU ! You give the 'why" rather than meaningless symbols and you make biochem fascinating, interesting and memorable

    • @imho2278
      @imho2278 2 года назад

      Barely. It's yr 12 level and is little more than a vocabulary list.

  • @goatsarecooleh
    @goatsarecooleh 7 лет назад +8

    Taking a Biology test with nothing but this video guiding me, wish me luck ✌✌

  • @ahmedmaged4917
    @ahmedmaged4917 7 лет назад +11

    its so hard to remember every step in kreps cycle and every enzyme catalyzing it😥😥

    • @juliely9590
      @juliely9590 7 лет назад +36

      One way to memorize the steps in the Krebs cycle is by using this mnemonic: Officer (oxaloacetate), Can (Citrate) I (Isocitrate) Keep (a-ketoglutarate) Selling (Succinyl-CoA) Sex (Succinate) For (Fumarate) Money (Malate). And every enzyme that catalyze these steps have correlating names to the steps. Hope this helps!

    • @ahmedmaged4917
      @ahmedmaged4917 7 лет назад

      wow ty easier now👌👌you are an excellent teacher👍👍

    • @sylviaachieng4780
      @sylviaachieng4780 7 лет назад

      wow thanks

    • @hajar5048
      @hajar5048 7 лет назад

      You are a life savior

    • @Protagonist
      @Protagonist 7 лет назад

      Wow! Useful AND mildly offensive!
      Thank you very much!

  • @luissalinas9143
    @luissalinas9143 4 года назад

    Ima start hearing this guy omw to any bio class just to have it fresh in my head then revise notes oh the options are endless to study now

  • @PrettyIsMyUsername
    @PrettyIsMyUsername 11 лет назад

    You explaines my entire semester in one video.
    Thank you SO much.

  • @Ignisan_66
    @Ignisan_66 3 года назад +5

    This is what the goverment won't tell you.

  • @rumibakili4465
    @rumibakili4465 9 лет назад +4

    I LOVE YOU

  • @ilovesawagraves
    @ilovesawagraves 11 лет назад

    wow! how did i not find this guy until now.. working on my microbiology final. awesome!

  • @zekiyc2047
    @zekiyc2047 5 лет назад

    Just amazing, Ive been trying to learn this for days then your 17 min video was all it took. Keep it up.

  • @WanSyazlina
    @WanSyazlina 7 лет назад +4

    if i say glycolysis occurs in the cytosol instead of cytoplasm.. would tht still be correct?

    • @silashahid7805
      @silashahid7805 7 лет назад +10

      Yes because cytosol is basically the aqueous part of the cytoplasm

    • @nasserhmed3907
      @nasserhmed3907 7 лет назад +2

      this is the best answer

    • @xfifina
      @xfifina 7 лет назад +1

      Syazlina Aasim Cytosol is the cytoplasm

    • @jahziel8785
      @jahziel8785 7 лет назад +2

      cytosol is actually the liquid thing in the cytoplasm

    • @SatoshiBall
      @SatoshiBall 7 лет назад +2

      Cytosol is in the cytoplasm. You are being more specific, which makes it a better answer.

  • @stoicwolf5931
    @stoicwolf5931 4 года назад +3

    My last two brain cells are screaming

  • @maadbunny
    @maadbunny 8 лет назад

    I love how he pulls up the wikipedia image and deciphers the complications of it all. THANK YOU.

  • @mohitaulakh3130
    @mohitaulakh3130 3 года назад

    i have watched this same video like 10 separate times during my degree and it is hands down the best video to watch to get a quicker refresher on Kreb cycle

  • @AxleSzn
    @AxleSzn 3 года назад +3

    Tbh... I’ve never heard anyone talk about this stuff in their life 😂

  • @adamwaskiewicz7378
    @adamwaskiewicz7378 8 лет назад +12

    GLI-COL-AH-CYS OK I GOT THIS...

    • @karajayde23
      @karajayde23 8 лет назад +3

      This is the Krebs cycle, love.

    • @adamwaskiewicz7378
      @adamwaskiewicz7378 7 лет назад +2

      love it already...

    • @zain4019
      @zain4019 7 лет назад

      Kara Skeleton holy crap that's actually the sweetest thing to say

  • @ltm8901
    @ltm8901 6 лет назад

    this video is 8 yrs old but it is one of the BEST VIDEOS ive ever encountered that helped me understand cellular respiration

  • @yamifonseca2993
    @yamifonseca2993 6 лет назад

    I'm a international graduated trying my best to past USMLE 1. Best explanation I found. I have to remember 8 years ago of 1st semester of med school and I really got frustrasted with boring and so detail diagrams on internet. Thanks :D

  • @nicoleatkins5276
    @nicoleatkins5276 9 лет назад +4

    Marry me??? I have Khan Academy to thank for getting me through biology

  • @thescolex
    @thescolex 8 лет назад +3

    cristaayyyy lmao

  • @chuvy23
    @chuvy23 11 лет назад

    This helps me understand the TCA cycle in soooo many ways! extremely helpful!!

  • @SavSav1996
    @SavSav1996 5 лет назад

    You literally saved my life with this video. I have an exam in 2 days and was so confused! It all makes sense now!

  • @JimNagle87
    @JimNagle87 10 лет назад +5

    According to my professor's notes 36 ATP's are created all together from the entire cycle... Not 38? Which is right?

    • @boomarcus22
      @boomarcus22 10 лет назад +3

      some text books and ppl teach 36 honestly just depends on who is teaching you but in a perfect chemical reaction the most possible is 38 but 36 is more common I think

    • @whitneylee3551
      @whitneylee3551 10 лет назад +2

      It is largely dependent on the cell type and it's efficiency. For example, cardiac muscle cells will produce more ATP than other cell types, because you're heart always has to beat...but, if you want a general average for all cell types...it's ~ 32. If you're taking a general biology exam, and they ask you how many ATP's are produced, you're going to want to say 36 though. This is because that's how many would be produced at a theoretical 100% efficiency. I hope this helps!

    • @katieesalibaa
      @katieesalibaa 10 лет назад +5

      Striated muscle cells create 38 ATP. Most cells, however, create 36 ATP :)

    • @bo637
      @bo637 10 лет назад

      it depends on the shuttle using to transport reducing equivalents into the mitochondria to be reoxidized in the respiratory chain. There are two shuttles, the malate-aspartate shuttle, which if used gives 38 ATP, and the glycerol-3-phosphate shuttle, which gives 36 ATP.

    • @thevidkid999
      @thevidkid999 10 лет назад +1

      Instead of ATP being produced in the cycle my lectures say GDP becomes GTP

  • @deltaroo420
    @deltaroo420 8 лет назад +4

    I didnt think you could make glucose from fats

    • @midgetking101
      @midgetking101 8 лет назад +2

      +Grant Harmon He gets a break this time. I'm sure he just misspoke and meant beta oxidation of fatty acid chains. Haha

    • @SuperioMan3432
      @SuperioMan3432 8 лет назад

      +Grant Harmon That's true because fats are esters made up of triglyceride esters, 3 fatty acid and a glycerol.

    • @emilrogengellschwaner3555
      @emilrogengellschwaner3555 8 лет назад +1

      +Grant Harmon its called gluconeogenesis and it happens in the liver

    • @david83178
      @david83178 8 лет назад

      +Grant Harmon They both have C H and O molecules. I read that you can.

  • @alexakandy5595
    @alexakandy5595 5 лет назад +1

    Literally, such an amazing video accompanied by an amazing teacher! Thank you.

  • @ITHrealXD
    @ITHrealXD Год назад

    This guy should make a new school for everyone. If he did, it'd be the best school ever ngl.