Cell Biology | Cell Cycle: Interphase & Mitosis

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Ninja Nerds!
In this lecture Professor Zach Murphy will be teaching you about the cell cycle: interphase and mitosis. We hope you enjoy this lecture and be sure to support us below!
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The mediocre teacher tells. The good teacher explains. The superior teacher demonstrates. The great teacher inspires. You are a great teacher.

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Videos are very clearly explained in detail and are very helpful

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💯💯💯💯

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isn't superior better than great

[@Farvids]

You are my father

[@morganvemu9680]

My teacher explained mitosis and meiosis in 5 mins reading slides 😑

[@hakonskog480]

I`m a Med student from Norway! You have become quite the celebrity at our university, keep up the good work!

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+Håkon Skog wow!! That's really cool I'm so happy that I'm able to help you all!

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Celebrity status in Scotland too :)

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Here in Czech republic too also Moscow # Med.Celebrity

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brw im a student in kenya studying medicine bt inshaalah when i graduate i will donate money coz u are the better than all my lecturers combined......thank u so much

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Also Iam from somalia

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Inshallah all the best for u brother

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I bet you won’t

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Am Kenyan too studying in canada, he is the best I 💯 agree

[@nahomelion]

I never get bored when he teaches. He is so unique

[@patiencejohnson4837]

Sameee

[@timeless1908]

I've been studying mitosis since the 8th grade. Decades later I finally understand it. Thank you!

[@derstip7252]

same here

[@JohnControl]

I’m in med school and still don’t understand it 😭

[@rekhashetty2963]

Excellent explanation

[@Im-not-alone-Im-full-of-myself]

@@JohnControloh believe science, your brain will evolve to understand.

[@sunnyiee_03]

@@JohnControlthis somewhat gives me comfort, i’m a freshman in uni rn 😭

[@skykingimagery899]

I'm a physician with 50 years of medical practice. These are some of the best, most lucid and powerful lectures you can watch and study. Kudos to you for such astute organization and presentation skills.

[@evelynestefan6762]

I am teaching biology to a student who is blind and thanks to your disposition and clarity she was able to understand this process.Thank you

[@musatouray7494]

Alhamdulillahi Rabbil A'lamiin. This is one of the most elaborate and insightful yet summarized lessons I've ever had. You can't understand better than this! I look forward to attending more of this kind. Thank you.

[@abdullahbabakharkhail4315]

Mashallah brother this shows how powerful ALMIGHTY ALLAH SWT IS 😮

[@tenishaoldham1170]

As a nursing student taking Cell Bio and A&P- his instruction taught me in 1 hour what I failed to learn over several weeks!! AMAZING is an understatement!!! Thank you, Thank You, Thank you!!🙌

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I agree!!!

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Dear ninjas I wanted to express my appreciation and awe of your work. I'm a chiropractic science student, ex high school teacher, still working full time whilst i study part time and hitting it hard but your videos are so well done. You are born performers teachers scientists and thoroughly inspiring. i just wanted to validate your work. you are so great i'm so grateful for your youtube offerings. if being in contact with a british science student, living in Perth Australia, singing your praises to everyone she knows helps you, get in contact. otherwise i will keep supporting you, with the means I have and sharing the good news of your self actualization and awesomeness. Keep the faith Ninjas, you are appreciated world wide :) thankyou! Sacha Norsworthy

[@jaynam2558]

Having a teacher who’s passionate and excited about the content they’re teaching makes learning soooo much easier. Thank you 🙏

[@derstip7252]

I am studying medical school in Turkey and have lots of problems in understanding the lectures but your videos are helping me way too much please keep making videos and helping people all around the world. Thank you

[@smritiraturi6564]

Don't know if you'll see this but I wanna say a huge THANK YOU to you and your team for all your efforts! I just submitted my assignment and I think it's best piece of work I have ever produced because of how amazing your videos are! Thank you!!! 🥰💖💖💖

[@darcydonald8379]

I'm not even a student but I find myself watching and learning. Very easy to stay engaged and very easy to follow along. And baboom

[@sxkhln8953]

i love how he looks so happy when he teaches!! literally meant to be a teacher. thank you so much for this video!

[@roxannepearson279]

I have my first AnP exam tomorrow and I didn't understand anything the teacher taught,I have to study all the system,cells, sense organs etc,I was scare until now,I found you and I feel calm,I feel like I can pass this exam 🥰☺️

[@davideisenstadt3745]

Hello NinjaNerd! I think I may have found a discrepancy in this video around 16:20. During the S phase you state that the cell becomes tetraploid (4n) - I believe the cell stays diploid but has 4C (twice the amount of genetic material) after replication.

[@michalzatloukal]

I was thinking the same thing. The number of chromosomes stays the same, but the chromatids of the chromosomes double.

[@holdupaish]

During endoreduplication, the cell replicates its DNA without going through the usual process of mitosis. This results in a tetraploid cell with four sets of chromosomes. During anaphase. In mitosis DNA content is doubled during S phase resulting in 2n chromosomes having two chromatids so, yea

[@frankzanche4693]

I am a pharmacy student from Africa, i am in Near East University Norther Cyprus, i am speechless about your skills bro, you are the man, i can only compared your competence,skills and impeccability to that of a Cell that is small but does a wonderful job. the fire that was quenching in me has been fueled to burn again with your lectures. God bless and keeps you with abundant energy bro.

[@cathrineaaramschroen5610]

Amazing!! You explain everything sooo well and you don't leave anything out like most other teachers do. It's easy to understand how everything hangs together and I don't sit with questions afterwards about things that have been left out. Thank you so much!

[@jawadabo-tabik4035]

You are way better than most of our fellow professors! You make it easy and entertaining to learn. Many thanks to you and your team, Zack!

[@oliverljungberg2082]

You make my life as a med student so much easier thanks! ur the best!

[@businesshubnamibia7244]

Thank you for a great and enjoyable lecture. You deserve a top class teaching award! Absolutely fantastic lecturer.

[@aliceyuniaty1689]

I am a biology lecturer in Indonesia.... Thank you for your videos... Very inspiring....

[@wisdomexplore997]

It's my first time that I am watching your lecture. I am super impressed of the way you teach and manage the lecture in a specific time. Thank you so much.

[@radebekeketso5616]

This is just priceless. Thank you very much. You made me understand it way better. Highly appreciated.

[@danjbro]

Mind blown - bro you are a freakin genius! You lecture circles around my professor! 🙌🏽

[@SavannahJaneNursing]

Currently studying for my TEAS test for nursing and this video was life saving! Thank you for being thorough, repetitive and excited about the human body!

[@sonakshisrivastava6958]

Thanks to you, Zach and your team. Your lectures are not only helpful for medical students, but also for someone, who is studying pure science and preparing for scientist entrance exams. Really appreciate the hard work, you guys put into it!

[@mahalakshmis4214]

This is the best ever cell cycle class I had... Really I understood concept very well... I can relate you to one my school teacher, who always made her classes interesting...... You are inspiring me to explain all these concepts in Kannada ( my mother toungue - Karnataka, India).... So that many more students, especially the rural students will continue their studies in science stream... Here in India we the students who studies in local language medium will find it hard to study science, as in higher studies they have to suddenly switch to a English medium...when they switch to English medium they find it hard to understand every word and just opt to move away from science stream... ( even I faced such problems )... Hopefully I can help them in future...

[@Army-1pl1og1y]

Your video is amazing and your way too, I'm a medical student from Egypt. you helped me a lot, I really thank you❤

[@nicolejaja270]

Man, I couldnt understand Cell division videos of 10min because there were so many things that didnt make sense to me, but you always give an explanation to everything, so it all makes sense. Youre amazing at teaching!

[@72amandarina]

I'm a master student in cell Biology and your classes are essential to me to understand my project background! Thanks a lot! Keep going with the great work!

[@monowarhossain9432]

Bro, I just love your explanation process.. all my questions about the topic is solved after watching your video.. Thank you and love you from Bangladesh..

[@parfoisbaker]

Thank you so much!!! You're saving my life !! /// from a thankful dental student in Sweden

[@dimitra908]

I don't think that there is another channel in the world like this.... I have covered all my gaps. Thank you very much!!!

[@monikagogoi5000]

I attended many classes,watched many videos online but still didn't understand the whole cell cycle but now my concept are totally clear about cell cycle.Thank you🙏

[@tigitamrat1521]

I really don't think you understand the impact you have in this world lol you have changed the game of education for me since freshman year of college. I graduated last year and I'm currently studying for the MCAT and you have been my favorite resource. Thank you so much for all your effort :")

[@ElizabethOwens1990]

I've been just watching hours of your videos. If I want to get more in depth than "crash course" this is where I go. You've helped me feel a little better about my bio final since I can't use notes and an AI will be watching me to make sure lol. Thanks again!

[@beatricecerenecarlos392]

i think the way you talk about each part of cell or whatever is happening is as if they are actually human beings and you praise their functions! I can't explain it but it's so good. thank you so much. you are so amazing, as well as your team!

[@neelamrevankar4907]

this is exactly what I feel like when I read textbooks ...the human body and everything on this planet are bloody perfect and amazing and mind-blowingly beautiful .... you're like the best on youtube right now ...beautifully explained ..

[@sinataramide6325]

God bless you abundantly for this video. I have been encountering difficulties in understanding cell cycle, but your explanation has made it so easy to understand. God bless you once again sir.

[@lordreyna6924]

I love the way he explains these topics!!

[@joanntommy6114]

I studied molecular biology and took cell biology as part of my undergrad degree. I wish we had videos like this in my day to reinforce learning. Excellent video!

[@MEssex-yd7cr]

I love this guys way of teaching. He's so professional and its great to speak the same language of some one else . Keep up the Great Work

[@strawberrymars98]

these videos really helped students through online class, thanks man we really appreciate this

[@zymbolic5590]

Do you know what age is his target audience?

[@anilakokapeta9203]

God has blessed you with a gift of excellent teaching skill. We like the way you make the topic simple and easy to understand. I request you to make a video on the topic "Meiosis".

[@AnteaterRae]

Thank you, thank you!! You are an amazing teacher and my go to when I need to really understand what they want to test me on. Teachers don't seam to teach much anymore and I need this type of hands on teaching. And I am a highlighting, drawing and connecting type of learner so I absolutely LOVE all the colors you use and especially love the sound of the marker caps clicking louder when you get excited about a topic. It makes it much easier and fun to learn!! Thanks again for helping me get As 😍

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I watch so many videos but nothing has ever inspired me so much as your videos do! Now everything makes lot of sense. Never knew Medical videos can be that interesting! Thank you for such amazing videos! You are gifted! Your enthusiasm is so infectious! Highly motivational and I carry a belief I could one day achieve my goals with the same energy and spirit! Thank you so much! May God bless you!

[@vedatatici9442]

brother, you are definitely doing a wonderful job but it will be so beneficial for me and other students if you could make more videos in terms of molecular biology. .....

[@Taslimbanu]

pls make more videos on molecular biology, transcription

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Please make more we need ur wonderful job please continue.. Thank u so muuuuch ❤️❤️❤️❤️❤️

[@apolinarsaavedrabustamante1750]

Eriov00000000000000000000000

[@Hugihugo]

Amazing teaching. Thank you for your great work and ad free videos. I'm happy to support you on patreon. Two things: - Personally, I'd move your support call up in your video description so that people can see it without having to click an extra time. - If I'm not mistaken though, you might have used the terminology of chromosomes and chromatids a bit unclearly. During the G1 phase, there are 46 chromosomes with 1 chromatid per chromosome (so 46 chromosomes AND 46 chromatids). And after the S phase, there are 46 chromosomes with 92 chromatids (not 92 chromosomes).

[@klausconteschertel2353]

i noticed that error

[@the_great7306]

Thnx for clearing the error, I thought I learnt wrong earlier!!

[@isamal-ayoubi7238]

Wonderful way of presenting and spreading biology knowledge. You present it better here than any other teacher I've known. Thank you very much.

[@gobindasethi5188]

Love the way u say.. This is so beautiful.. It makes the complex process more easy.. . Thank you.. From India

[@toruwatanabe2095]

if i ever become a med school teacher, i wish i'll teach exactly like you do

[@georgereese2066]

i am a physician and i thought your cell cycle lecture was more then outstanding !!!! i keep watch your incredible performance and enjoying more then a movie !!!! dr Katherine Reese Er doctor

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Love the way he makes everything so easy to learn!! I wish every prof teaches like him

[@tkcollins583]

I am supposed to be marking but I can't stop listening to you explain. I don't know if you have a team but great job! I am sure that there is so much being sparked beyond learning, imagining and being inspired in these students' minds through watching these videos. I'm so mad you hadn't created these while I was studying. Continue the good work. Your fellow Ninja Nerd xoxo

[@Martin-xf8be]

This is awesome! Just saw Spermatogenesis also - much better than the textbook! Is there any way that you could do one on Meiosis as well?

[@senioracademia1947]

dude are you real? like i am so happy i finally found a complete long lecture about the topic that isnt 10 min or too animated but shallow content-wise, i mean you are incredible! thank you so much for focusing on depth over crazy animations, shortness or fun facts, just old fashion in depth well structured lecturing is sometimes essential and thank you for meeting that need for free.

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So happy I found you. You are a life saver. I was struggling with physiology until I watched a few of your videos. Just had to order merchandise! Now back to more videos

[@tasneemraniwala7098]

The description is beautiful, absolutely loved it.keep up the good work you guy's doing by making our lives easier a bit.

[@estherhaddasa5295]

Thanks for this perfect explanation

[@sethcope4671]

“And separate the suckers” made me laugh. Great vid

[@MSHusaynS]

Easy & Simple 👌

[@user-nx2sb7dl1s]

This is a bloody excellent explanation, always great when you give these quick contextual explanations. Great work !

[@saba4079]

🎉🎉🎉🎉what an explicit lecture it was you saved me from a nightmare hats off to you sir😊

[@willowdesk]

i dont think it goes from 2n to 4n in mitosis. it stays 46 chromosomes with a diploid number of 2n but it now has sister chromatids. so you have 92 total chromatids. number of chromosomes stays the same in mitosis.

[@noorbhatia1200]

yes, he is referring to chromatids but no. of chromosomes stay same

[@snufkinsnufkin2528]

@@noorbhatia1200 it's kinda funny he even talked about how the number of chromosome means the number of centromeres independently on the number of actual DNA copies but still made the very mistake

[@jared394]

yep, just caught that mistake and went right to the comments lol

[@lailahaddad9288]

Noticed that too

[@TonyTigerTonyTiger]

"number of chromosomes stays the same in mitosis." Not after the sister chromatids separate during anaphase and on into telophase, prior to cytokinesis. At that point, the cell is 4n.

[@azralimkkheda]

It would be a great help if you could also explain meiosis in another video lecture

[@hunterhills3047]

(XX) (X) (X) (>)()(

[@djalmapaz9032]

Amazing explanation; I was able to understand tons of knowledge in just 47 minutes, thanks for sharing.

[@parkjina1564]

I have always faced prblm learning this topic... but today it was all clear and so simple... I'm glad I choose to watch it here... thankyou for your hardwork... it was totally worth it... fit in my memory forever.... 👍

[@AhmedSalah-sr3os]

AMAZING! AFTER ALL THIS complexity, tuning, and order how any one can even dair to belive in eveluotion and say (we are sons of coincidence) WHER IS YOUR MIND PEPEOL!

[@mohammedalharbi6474]

Actually this is exactly what evolution is. A cell wouldn’t have become this complex without billions of years of evolution to reach what it is today. WHERE IS YOUR MIND!!

[@AhmedSalah-sr3os]

@@mohammedalharbi6474 : sorry my dear, but after high level of complex such like this, "billions of years" of random knocking at the genatic material doesn't make any sense to me 'neither siens Scientifically nor logically and I change you to prove this, put please bro I want siens and logic not strang stupid stories.

[@mohammedalharbi6474]

@@AhmedSalah-sr3os just because it doesn’t seem logical to you, doesn’t make it wrong. Evolution is real. It’s a fact with thousands of evidence and real life applications. You can do your research. Have a good day

[@AhmedSalah-sr3os]

@@mohammedalharbi6474 you know bro... this is the strang thing I guess,ther is no even one complete evidence for this eveluotion can you imagine! and by complete evidence I mean until now, we don't have a transitional animal fossil, and we can't intentionally create evolution in the lab despite our claim that it happened by chance, so how we can say "this is siens" ! all we have guesses of people say that they are scientists and even them, they are not sure! and you can do your search bro.

[@TonyTigerTonyTiger]

@@AhmedSalah-sr3os First, complexity is not the sign of a good designer, simplicity is. If you get 20 designers and give them a specification, and all 20 created designs that meet all criteria, the best designer is not the one with the most complex design, but the one with the simplest design. Second, it is a logical fallacy - straw man - to refer to evolution as random knocking at the genetic material. For example, you leave out natural selection, which imposes a directionality onto evolution by tending to eliminate deleterious mutations, and to retain - and spread - beneficial ones.

[@anupamameegodage7016]

Thank you very much!!!! if you could do a lesson on the meiosis process it would be a huge help to us. May God Bless You!!!!

[@ketocajun7451]

Truly amazing this miracle happens all day long in your body and you never know. The dance of biochemistry is beautiful.

[@ioriyagami9231]

Would you believe I don't skip your ads? Coz I don't. I'm grateful for your videos. Thanks!!

[@carolinamendonca7336]

Do a video about meiosis please!!

[@ashleynewton5573]

I was just wondering why you don't class the prometaphase as a separate stage of mitosis?

[@abdullahmohamed6195]

i don't know how to tell you how much i appreciate your effort... thank you so much sir

[@MICHAEL-px5gq]

You are officially my Biology Instructor! Well Done! Made complex concepts, palatable. Subscribed!

[@prashantkumarparmanu]

this gangster looking guy has a true spirit of a teacher . Thanks a lot . Respect .

[@pranavschandran9037]

Bhai thoda English acche se use kro he ain’t a gangster pata hai majak hai but india m jo majak ho vo bahar sayad na ho

[@sanjanaahlawat4979]

Sir u r saying that chromosome numbers also doubles but I think only DNA replicate i.e 2n to 4n but not the chromosome

[@sanjanaahlawat4979]

During S phase

[@mr.izatullahkhan3893]

When the replication of DNA occurs as a result cell contains twice the number of chromosomes

[@TonyTigerTonyTiger]

@@mr.izatullahkhan3893 In S phase, the number of chromosomes is not increased. Human cells have 46 chromosomes (2n) in all of interphase, and in prophase and metaphase. It is not until anaphase that the number increases to 4n, when the sister chromatids separate and each becomes its own chromosome.

[@TeacherJoyce80]

You have explained what most teachers are not able to do. I now know mitosis in my fingertips. Thanks, teacher

[@parisabanks2412]

As always, excellent video. You are truly gifted and meant to be an educator.

[@historyfunfacts12]

Why "sister" and not "brother" chromatids Why not "son" cells but daughter cells🤣🤣

[@dasokay]

Because reproduction and birth is mostly associated with females and not males😁

[@DanielaOvares]

Not sure if anyone has mentioned this but would like to take a moment and appreciate the extra few seconds they left after he walked away to be able to look at all the notes completed on the board. I definitely took a screenshot of it and will be referring back to it to review and make my notes. Never enjoyed learning about this so much! Amazing explanation!!

[@amscsk1658]

idk about u guys but when i am watching, his explanation is so clear that i can instantly memorise it. SO COOL!

[@yungloconutz]

I finally understood the cell cycle. I appreciate how thorough you are

[@fated2you]

Phenomenal instructor. Thank you. Subscribed.

[@martinhendawi9319]

You have become our superhero at my med school in Sweden! Much love!

[@KatieBautista-ir7fh]

This was explained so well, I love your videos. Thank you so much!

[@solangewergles6563]

Hi ...I"m a dentistry from Brazil, and you are the best teacher I ever have. Thanks a lot.

[@jennifermarcenelle5309]

Thank you sooo much. I drew it along with you and finally get it. Thank you for simplifying!

[@ahmadsaqibqaeym1684]

Mr. You're really really helping me through all my bioengineering courses... Thanks a lot

[@vicnoma]

Thank you so much for explaining this to my understanding. You are AWESOME.

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I love Ninja Nerd, seriously, guys. You are amazing and thanks to you my college journey has not been a complete nightmare

[@johnpayne5441]

good work! Just the right amount of detail and explained very well. Keep it up, I am about to start searching for more videos that you guys do.

[@andrewpleva]

Great short and concise video!

[@lindascanlan6317]

You are the greatest .....I never understood it when I took biology in college...it confused me but you unconfused it all!

[@jaidynjohnson2192]

most enthusiastic professor ever. Thank you for making learning fun

[@sophiekh3334]

I've been studying something less biology related in my bachelor's and trying to get into a neuroscience master. Your lectures are great, as they condense knowledge understandibly and well organised but are often not as long as a university lecture. Apart from that they are presented in a way that I can take notes from it and actually remember what I was trying to say, when I noted it down :) and you do not have a long intro/outro!

[@TheAIEpiphany]

We should call this process the lonely dance of a cell - a beautiful orchestration going on in there. Also kudos for the teaching style again - the great thing about these videos is that they are so easy to navigate through.

[@thobekacandy378]

Ninja Nerd we are blessed to have you You make every topic so simply and understandably Thank you so much

[@languageandmana9255]

You are the biggest help to students who study online and can not afford private teachers. Thank you 🙏