Cell Biology | DNA Transcription 🧬

Поділитися
Вставка
  • Опубліковано 28 гру 2024

КОМЕНТАРІ • 1,1 тис.

  • @aliabdl8697
    @aliabdl8697 3 роки тому +1334

    You are a gift to humanity. Tanx Zach

  • @digantapatra7198
    @digantapatra7198 29 днів тому +8

    Thanks

  • @lyuboslavlichev6454
    @lyuboslavlichev6454 3 роки тому +231

    i passed my cell biology last year , im here just to give this guy thumbs up .

  • @SanaKhan-nl9jn
    @SanaKhan-nl9jn 2 роки тому +107

    It may be cuz its 2 am and i am studying transcription through tears but i think i love you! You’re a true legend and you’re doing med students everywhere such a service. God bless!

    • @damonrossouw9732
      @damonrossouw9732 Місяць тому +6

      Biochemistry students really are gods strongest soldiers

  • @sajiahaider4732
    @sajiahaider4732 2 роки тому +498

    It's weird I can feel the enthusiasm and his excitement while he is giving lecture... The way he want us to learn is literally like playing games.... Love it 😍... The passion you are expressing to spread to knowledge and make learning an interesting thing.... I'm student + I teach too .... As a student I always try to make leaning fun so that I can enjoy but seeing others struggling in study make me feel sad.... And I started building my aim that I will try my best to make learning so much interesting for everyone that they can feel and enjoy it .... I'm trying my best .... As for you sir I'm truly inspired and motivated more 😍 never seen anyone working so much hard .... The way you smile explaining any concept Feel like really that you have deeply drown in that topic to that extent that you can talk them as a person.... 😍 Your single video is more worth and interesting for me than Netflix series... More power to you... Love from Pakistan 🇵🇰❤️❤️❤️❤️

    • @sorryfellers3550
      @sorryfellers3550 2 роки тому

      😂😂😂😂

    • @ummenisa
      @ummenisa Рік тому +6

      Wow what a nice comment. Watching this video from Pakistan 🇵🇰 too

    • @freewill4912
      @freewill4912 Рік тому +1

      🇮🇳🇮🇳🇮🇳

    • @marameid2928
      @marameid2928 Рік тому

      😢😢😂 🎉🎉😮r

    • @Jaybug20
      @Jaybug20 Рік тому

      Okay but what is good so week 😢

  • @krienbergproductions8844
    @krienbergproductions8844 Рік тому +82

    I passed the most difficult exams in Biochem because of this guy ! Amazing man ! Thank you so much. Continue to help the world =)

  • @wassymassy2290
    @wassymassy2290 3 роки тому +594

    The 39 dislikes are jealous biochem professors

    • @embryologyteratology
      @embryologyteratology 9 місяців тому +6

      Sure

    • @sirv1k
      @sirv1k 8 місяців тому +7

      or the students that were forced to watch this

    • @elmyst9108
      @elmyst9108 7 місяців тому +2

      Or bots

    • @tashichopel5235
      @tashichopel5235 7 місяців тому

      hahahahaha truee

    • @TUMNAD
      @TUMNAD 3 місяці тому +3

      This man is the God of medicine

  • @everythingpayment
    @everythingpayment 3 місяці тому +22

    My cells doing all this without been taught . So much knowledge that I have to be thought. Yet someone is out there claiming everything is by chance, how does chance continually repeat itself in a definite intelligent manner, even a simple calculator is not by chance. Trust my folks they has to be a creator

  • @mohammedabdulrazzaq7193
    @mohammedabdulrazzaq7193 3 роки тому +201

    Where were you last year, when my brain was crushed trying to understand this complexity? I guess next year medical students at my school will just chill out, watching this miracle video and saving a lot of reading hours in the textbooks THANK YOU!!!!

  • @friedbagel6893
    @friedbagel6893 Місяць тому +4

    In first year of med school in france and may i say, your explanation, mannerisms, rithym and choice of words summarizes the information so clearly.
    Thank you sir.

  • @romo3192
    @romo3192 3 роки тому +59

    From the bottom of my heart, I say a prayer to you Zach that God will bless you as you have blessed me with knowledge of science (medical student). I am so grateful for your enthusiasm to teach in such a way that is easy to learn.

    • @LedZeppelin_3
      @LedZeppelin_3 Рік тому

      If you truly embarce and understand science you would know that there is no God

  • @LizetAndreaa
    @LizetAndreaa 3 роки тому +143

    I LOVE how much Zach loves to teach! It really makes the world of a difference for your audience. Congrats on 1 million subs to the whole Ninja Nerd team, it is very well deserved!! Your videos have personally helped me so much.

  • @taylormayeux562
    @taylormayeux562 3 роки тому +26

    I have learned and retained more in this 1 hour and 25 minute than I have with 4 days of studying. You are amazing and I am SO thankful.

  • @clarastambassi_
    @clarastambassi_ 3 роки тому +6

    I have to tell you that english is not even my mother language and you make it so EASY! I don't have any other word for you but espetacular! You're an amazing teacher! Thank you very much

  • @AhmedMohammed-jo5ug
    @AhmedMohammed-jo5ug 25 днів тому +3

    The gift that keeps on giving. Thank you Sensai.

  • @Moha-km1jm
    @Moha-km1jm Рік тому +18

    What an absolute legend this guy is. This has helped with molecular biology so much !!!

  • @b.tann__
    @b.tann__ 7 місяців тому +45

    If I get the opportunity to ever do a speech on how I made it as a doctor, I will be sure to thank you before I thank anyone else!!!!!!!

  • @BillFilson
    @BillFilson 3 роки тому +78

    An amazing lecturer. He has described an incredibly complex process in a manner completely understandable. I will watch this again and take notes. Thanks so much, I will look forward to watching many more of your very informative lectures.

  • @sudikshachopra1936
    @sudikshachopra1936 3 роки тому +35

    YOU ARE a blessing to humanity!

  • @BitseatGetaneh
    @BitseatGetaneh 3 місяці тому +5

    Someone in the comment said that you are a gift to humanity and it couldn't have been anymore true!! Thank you Zach

  • @silenceplease7372
    @silenceplease7372 3 роки тому +5

    52:54 5' capping
    1:04:38 splicing
    Thanks for the video! It's really helpful.

  • @elizabethcalvert6927
    @elizabethcalvert6927 3 роки тому +23

    This guy is saving me from failing University Biology single handedly. God bless you bro! Keep doing what youre doing cause youre helping lots of people like me.

  • @cutecathatesme336
    @cutecathatesme336 Рік тому +7

    When you are a grown up dentistry student but you yell the answers to the screen like a 1st grade child when it is Zach's lecture... How can you give all the hard, high level details with clinical relation while still keeping it very interesting is incredible! Thank you

  • @saido7969
    @saido7969 Рік тому +2

    I'm from Iraq, study dentistry.
    My English is not very good, but I can't find good Arabic or Kurdish Explanations on UA-cam.
    This channel is very helpful.
    Thank you
    😊

  • @abdelrahmanmarzouk485
    @abdelrahmanmarzouk485 2 роки тому +3

    Man I jus wanna say one thing. Your way of explaining is the best ever. You`ve literally explained concepts that were very complex to me in a very easy and simple way. You`re a treasure for humanity, man. Thx for you.

  • @bellyl1674
    @bellyl1674 3 роки тому +11

    I am not a biology student, but this helped me understand the process of mRNA and it gave me a better understanding. I am in IT and know only the basics of biology, but I have to say (even) with this limited knowledge I understand it completely. For me Cell Biology looks like very sophisticated software and the programming is at a level ....... that no human-made software has ever reached. Amazing, makes me want to study this even more! Thank you!

    • @Sk1pperCS
      @Sk1pperCS 2 місяці тому

      Yeah its great. We truly are recreating ourselves!

  • @preranabiswas6712
    @preranabiswas6712 2 роки тому +3

    All those difficult topics suddenly metamorphosed into simple beautiful ones!!!
    ZACH you made learning so interesting.
    One of the best teachers in the world right now!

  • @goldenirlii
    @goldenirlii 9 місяців тому +1

    I thank you from the bottom of my heart. I only just started my journey with medicine, unfortunately I had already failed. I hope to come back in a few months, prepeared better than ever. If I ever manage to become what I dream of, I will never forget what you have done for me. You have my uttermost rescpect.

  • @Luigisiddhart
    @Luigisiddhart Рік тому +3

    How good this lecture is blows my mind, and make me thinking how university teacher are not good 'cause don't have this enthusiasm and passion .

  • @Buamarys
    @Buamarys Рік тому +1

    You saved my life, like literally I was sitting here crying at 1 am about my exam thats happening in 7 hours and you're my hero. I am so glad to discover this channel on time. Thankyou soo much for making this.❤

  • @---sf1fz
    @---sf1fz 2 роки тому +142

    Could you please do a full in depth video on eukaryotic gene regulation? Like including the TATA box and TBP, etc, it'll be sooooooo helpful, it's the only topic i can't wrap my head around fully its so complicated and u always manage to make me understand.

    • @janetanna8542
      @janetanna8542 2 роки тому +9

      Sameeee I want to study that topic from Dr. Zach only

    • @hansa5867
      @hansa5867 Рік тому +7

      God yes please. Such an important part in med school

    • @geneie6050
      @geneie6050 9 місяців тому

      Same! As a biotech student I was so disappointed to find this video was overly simplified in many ways. Currently learning it from shomu's biology. He's awesome too.

    • @aissatouchouwat4546
      @aissatouchouwat4546 3 місяці тому

      TATAA box is a sample of the promoteur

  • @Mathyew_
    @Mathyew_ 3 роки тому +37

    Zach, my man you are killing it I appreciate every second you teach something on this channel really clears things up for me and helps me understand things that fly over my head in class

  • @manfredh70
    @manfredh70 3 роки тому +72

    Teachers should really just watch your videos to get an understanding in how to make a lecture both interesting and informative.
    Great works! I watch your videos for fun and for your creativity.
    thus I am a medical student

    • @HeavenlySunset24
      @HeavenlySunset24 2 місяці тому

      Right. My professor doesn’t seem to know how to explain things

  • @AleksandrSharashkin
    @AleksandrSharashkin 3 роки тому +15

    You are amazing! You make all this stuff look so easy. Finally now I can easily understand what is written in academic book. Thanks a lot!

  • @marufhasan1684
    @marufhasan1684 6 місяців тому +1

    This is what pure testosterone is! Making the best lecture on DNA transcription totally free for everyone. I am really astonished that I can get such high quality contents just for free. Hats off to you and your team. Love from Bangladesh.

  • @emilypaterson7270
    @emilypaterson7270 2 роки тому +5

    A massive thank you for the effort and enthusiasm you put into all your wonderful videos. I can’t emphasis enough how perfect they are for medical students. We are unbelievably grateful for your contribution to our learning, you make such a difference. THANK YOU.

  • @erinelise4927
    @erinelise4927 Рік тому

    This guy is seriously amazing. What we have been spending weeks in genetics learning has been summarized in an hour and I actually understand it now. Thank you Zach, you are saving STEM students!

  • @soumyadeepchatterjee6698
    @soumyadeepchatterjee6698 Рік тому +7

    i just want to say thank you soo much sir... your all dna replication, rna transcription and translation videos are just soo good it just saves my exam today[molecular biology paper] again thank you ..😇

  • @focusfirst3954
    @focusfirst3954 3 роки тому +14

    After a terribly difficult year in my boring Zoom biochem class, this saved me. Thank you, Zach

  • @cromata9513
    @cromata9513 3 роки тому +111

    If someday I graduate as a doctor, I'll invite Zach to my graduation party for sure

    • @ayajaafar8354
      @ayajaafar8354 Рік тому +6

      hows it going ?

    • @cromata9513
      @cromata9513 Рік тому

      @@ayajaafar8354 not bad, currently half way through the career !

    • @LAI-741-Official
      @LAI-741-Official 6 місяців тому

      @@ayajaafar8354 ?

    • @HeavenlySunset24
      @HeavenlySunset24 2 місяці тому +1

      Hope you made it

    • @cromata9513
      @cromata9513 2 місяці тому +2

      @@ayajaafar8354 heyy, very good actually :) thanks for asking, just 1 year left

  • @smartyupload
    @smartyupload 3 роки тому +57

    45:20 some error here just to help others to clear up, the inverted repeat sequence should instead be CCGGxxxxCCGG instead of CCGGxxxxGGCC. Inverted repeats are formed by converting the initial sequence to its complement and then reverse the complement base order. So for example an inverse repeat of TTAGC where the complement will be AATCG and the reverse of it is GCTAA. Hence GCTAA is the inverse repeat of TTAGC

    • @QueenHarmony_llc
      @QueenHarmony_llc 3 роки тому +1

      🤣👍🏾I am not alone

    • @unknownpornstar2327
      @unknownpornstar2327 3 роки тому +1

      What has ur life come to

    • @blackfoxmp5
      @blackfoxmp5 2 роки тому +2

      Based on your reasoning, the initial sequence written by Zac should be converted to the corresponding sequence and, thereafter, inverted. The answer you have provided inverts the initial sequence of the code, not the complement sequence. Thus, the answer provided in the video is correct as it inverts the complement sequence. The inverted repeat is written in red, which is the inverted repeat of the complement sequence.

    • @knowledgehunger6988
      @knowledgehunger6988 6 місяців тому

      For rho independent termination, there should be palindromic sequence, that helps in formation of hair pin loop like structure

  • @hakonamatata9110
    @hakonamatata9110 3 роки тому +19

    Please don't call it frustrated. 😂
    As we ARE Ninjanerds 💪🤓, we feel that it is so COOL 😍 to know about all these stuff. We already know that these topics are full of details but you made them ("as always" 😉) as easy as a piece of cake. Words can't describe our deep appreciation for you and for your lovely team 💕. Thank you from the bottom of our hearts. 💛💚💙💜❤💖

  • @user-zt4qr7mz4f
    @user-zt4qr7mz4f Рік тому +2

    I wish I had found this sooner 😭 this is by far THE BEST video I've came across, no one explained everything in great detail like you did, and we're studying literally every single little thing in my uni, so this was very much needed. thank you SO much ❤

  • @abdelrahmanmohammed6758
    @abdelrahmanmohammed6758 3 роки тому +4

    A like is few. A simple like is sooo few to appreciate this effort. Thnx Zach ❤️

  • @onionlayersed
    @onionlayersed Рік тому

    At the end, Professor Zach didn't really have to say, "Sorry for making this long", but thank you so much for helping millions of people out here. Because the truth is, most of our lecturers here aren't that much interested in making someone understand something. But your passion, and teaching skills? Priceless...

  • @jokeminaj
    @jokeminaj 3 роки тому +13

    Thank you so much for this, literally did this last week in biochemistry and found it so confusing in the book and lectures since its more detailed and poorly explained, so I thought maybe Ninja nerd made a video about it but not yet, so thank you a lot Zach you are a real life saver, really helping me pull through with your videos especially now during the pandemic, good work as always

    • @nancyruth28
      @nancyruth28 2 роки тому +1

      Thanks Soo much u are a blessing to this world

  • @mounotashopno5113
    @mounotashopno5113 6 місяців тому +2

    Brother I can’t explain how much you are helping usss medical students
    Without your lectures it would be really difficult to develop foundation of medical science
    Thank you so muchhh
    May Allah bless you
    Lots of ❤❤❤❤❤❤❤❤❤❤❤❤❤❤ from Bangladesh 🇧🇩

  • @tubashaikh6105
    @tubashaikh6105 Рік тому +30

    You should totally do a video on DNA repair mechanism. By the way i love your video. I can only pass exams cause of them. Its literally so cool that you can teach someone so well. 🙂
    I really face a lot of troubles with my studies but your videos always help me. I think you should totally replace all of my professors of my college 😅

  • @jameshurson8495
    @jameshurson8495 3 роки тому

    Hallelujah. This gentleman is a true master of the art of education. Demonstrating friendliness deep personal understanding of process and true content comprehension, conveyed in a compellingly lucid and warm manor. Praise God for such talent. We need it and more of it.

  • @someone-yj2im
    @someone-yj2im 3 роки тому +26

    After seeing what's written on the back of his shirt, I went straight to the end because I was sure he was going to turn his back to show "as always, until next time" 😂 😂 ❤️❤️

  • @blakebergeson9688
    @blakebergeson9688 Рік тому

    The pure joy in Zach’s face when he’s teaching this stuff… contagious. Thank you, sir.

  • @youngkayla1617
    @youngkayla1617 3 роки тому +9

    I appreciate you more than you’ll ever know! Your videos have helped me understand SO much, and I’ve enjoyed every minute of it. 😁 thank you!!

  • @sonal4365
    @sonal4365 9 місяців тому +1

    your lectures are worth of my 2 months classes. thank you so much

  • @janakiraman3412
    @janakiraman3412 3 роки тому +4

    Now i got idea about how introns are split over from exons . Excellent sir 👍🏼

  • @maryamsaadattalab3790
    @maryamsaadattalab3790 2 місяці тому

    i cannot express how much i appreciate you. your videos and teaching are literally the greatest gifts I can ever have as a student. Thank you Zach.

  • @teresavuvuvu1
    @teresavuvuvu1 3 роки тому +3

    WOW this was beautifully explained. The visual and organization of this made it so much easier to grasp. thank you a milli!!

  • @berkecemburke318
    @berkecemburke318 Рік тому

    You have a gift of teaching Zach. Believe me that you're the best I've ever seen in my whole life

  • @ConLawElements
    @ConLawElements 3 роки тому +29

    Always a joy to learn from you, Sir! Thank you!

  • @raaniyahbabur528
    @raaniyahbabur528 10 місяців тому +1

    Excellent explanation. Best teaching skills. Outstanding intellect. You are truly a wonder

  • @Luka-yh3dv
    @Luka-yh3dv 3 роки тому +5

    Thank you for the great video, you’re the professor every medical school needs 💙

  • @facaibianshuai
    @facaibianshuai Рік тому

    I'm from Taiwan, and currently studying in this theme now. YOU ARE such a amazing guy! Thank you so much to elaborate them in such easy way, even though that's not my native language. Thank you again!

  • @XAheli
    @XAheli 3 роки тому +15

    Reverse Transcription, Translation, Lac Operon on the wayyyy. Thank you Zackkkk ❤️

  • @AuroraMedicine
    @AuroraMedicine 3 місяці тому +1

    I didn't know studying could make me happy until I discovered your magical channel ❤❤❤❤❤❤❤❤❤❤❤

  • @ريانالشمري-ل7غ
    @ريانالشمري-ل7غ Рік тому +5

    🐐 OF MEDICINE

  • @davekehnast7034
    @davekehnast7034 2 роки тому

    This is totally fascinating. With all this talk about "because science," I've decided to learn science. I think all I need to know is within your videos.

  • @medicallectures4423
    @medicallectures4423 3 роки тому +20

    Any plans to cover Genes & Inheritance?

  • @europehuns9827
    @europehuns9827 7 місяців тому

    what an amazing explanation, I just clicked in video to check if I can learn something or not but after I watched just few minutes it become took me inside of it and now I am dangin ready to my molecular genetic exam in that topic.

  • @tommasotonsi9876
    @tommasotonsi9876 3 роки тому +5

    Hi Zach, I'm a fan from Italy. I love what you do. Can you create a playlist where you talk about Pain? All about the pain, and the pain treatment: Chronic pain, sensitization etc.... I think that there is nothing around about this topic. It will be amazing. Thank you!

    • @jeanettespiteri7180
      @jeanettespiteri7180 3 роки тому +1

      check out the descending modulation video, it's covered :)

    • @tommasotonsi9876
      @tommasotonsi9876 3 роки тому

      @@jeanettespiteri7180 Sorry, you mean the gate control one?

  • @AhmedMohammed-jo5ug
    @AhmedMohammed-jo5ug 25 днів тому

    I would never have ever, ever ever ever, understood this quite easily and literally as ABCs were it not for you sir. Thank you.

  • @elijahmorakinyo8212
    @elijahmorakinyo8212 3 роки тому +7

    Thanks Bro , Looking forward to translation and Protein synthesis

  • @bellismoaz
    @bellismoaz 2 роки тому

    currently in my first year of med school and i have to say that you are a savior.

  • @Linhlan07
    @Linhlan07 3 роки тому +4

    oh my god, I can't thank you enough for this amazing video.

  • @lindaleith9588
    @lindaleith9588 Рік тому +1

    I can’t thank you enough for all your hard work, you’re so good at what you’re doing and i wish there were more teachers out there like you!

  • @Nina-et-al
    @Nina-et-al 3 роки тому +3

    Thank you, thank you, and thank you! I wish my professors would be at least an inch closer to your enthusiasm. You are amazing! Nothing more to say!

  • @ShoaibMalik-un7qv
    @ShoaibMalik-un7qv Рік тому +1

    MAN DAMMIT U R THE BEST AT EXPLAINING THESE HELL THINGS... like ur effort can be seen clearly, that apart from everything u want students to learn these things without getting confused...

  • @shivangidwivedi6273
    @shivangidwivedi6273 2 роки тому +5

    For me he is the *Alakh Pandey* of medical school 😇🙏thank you so much sir

  • @mashaelawad1164
    @mashaelawad1164 3 роки тому +1

    you are the best doctor I 've ever seen .. thank you for ur explanation

  • @SariaTariq
    @SariaTariq 2 роки тому +3

    Jazak Allah (Thank you)

  • @HeavenlySunset24
    @HeavenlySunset24 2 місяці тому

    Thank youuuu, my professor doesn’t explain it well. I’ve been searching all kinds of videos and I couldn’t tell the difference between prokaryotic and eukaryotic transcription. You’ve gone into more detail than the other videos.

  • @joeburreaux7953
    @joeburreaux7953 3 роки тому +3

    Please do more biology videos!

  • @tanumoydas4996
    @tanumoydas4996 2 роки тому

    The best teacher i have ever seen till now. Love and respect from INDIA!!!!!!

  • @SafaTala-y2u
    @SafaTala-y2u 10 місяців тому +3

    You are god’s gift

  • @oksanasvyryd3462
    @oksanasvyryd3462 2 роки тому +1

    This was the greatest explanation after 3 years struggling with this topic, I finally figured out what is RNA polymerase doing on DNA :)

  • @siyahkugu1819
    @siyahkugu1819 Рік тому +6

    I am learning english to understand you. I hope one day I can understand better.this is my dream.

  • @candicew.1096
    @candicew.1096 3 місяці тому

    Still saving medical school dreams 3 years later. Thank you for this!

  • @Malik-7.j
    @Malik-7.j 5 місяців тому +3

    Sir ❤️💜❤️❤️

  • @ehsanafzal6530
    @ehsanafzal6530 3 роки тому

    YOU ARE MY HERO. An Inspiration for students around the world to teach. Thanks for everything Ninja Nerd Team

  • @sahilbhat4454
    @sahilbhat4454 3 роки тому +4

    I left zoology after masters bcoz I couldn't understand it in depth.....
    Had this teacher been that time I wouldn't shift to Humainities

  • @rebeccaomozuapo5858
    @rebeccaomozuapo5858 3 роки тому +1

    You are a rare genius and a blessing to mankind. God bless you.

  • @zyadstorm
    @zyadstorm 3 роки тому +3

    LMFAO the rest of Transcription factor 2 types wrote it as "HE FAB" 27:36

  • @intellectuals7716
    @intellectuals7716 3 роки тому

    Oh, you can’t imagine how much I love you…Your lectures are so interesting that I can’t even pause the video for a second.

  • @CristinaMorales-l9q
    @CristinaMorales-l9q 10 місяців тому

    You really help me visualize, understand and retain all this information. You’re god sent! ❤

  • @RealAron
    @RealAron Рік тому

    Am a student doing education in my first year but you are turning me into a whole different teacher . Thanks alot

  • @aprilsweetcheer1
    @aprilsweetcheer1 3 роки тому

    Man, thank you!! I’m taking cell & molecular biology and you literally teach what my professor doesn’t, so thank God for you!

  • @MosesIkeakhe
    @MosesIkeakhe 6 місяців тому

    This is probably my first comment on UA-cam but you've earned it man. From zero to hero just by watching your videos, keep up the hard work brother 💪

  • @tunia8167
    @tunia8167 9 місяців тому +1

    I can’t thank you enough you’re a hero in disguise , I’ll make sure to donate to the channel as soon as I can

  • @livingroomstream1368
    @livingroomstream1368 3 роки тому +1

    I left this page and had to come back and like and comment because you deserve it. awesome job

  • @scientificbhaiya9336
    @scientificbhaiya9336 3 роки тому

    I not just like the video but I Love your videos... Just the best way explained. Your deserve more Subscribers and followers.

  • @macmusic12
    @macmusic12 3 роки тому +1

    I have no clue in medic, but watch your videos a lot and am really impressed; I can just say you're out of this world, a true version of gifted medical Ninja, thank you... thank you 💓👍

  • @shaima6618
    @shaima6618 2 роки тому +1

    this is amazing , i am so impressed by that much of information that you provide in an easy way to be understood . definitely this channel will be my first option and choice. thank you for every minute you gave . that helped me much to understand what our Dr.s in collage couldn't provide