GCSE Biology - Cell cycles, Chromosomes & Mitosis #69
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- Опубликовано: 23 сен 2018
- In order to survive and grow, organisms require a constant supply of new cells. In this video we explore how these cells are generated through the cell cycle, with a particular focus on mitosis. We will also look at the role chromosomes play and the different forms they take.
In this video, we'll look at:
- How new cells are generated by the cell cycle
- What mitosis is, and how it works
- The role of chromosomes, and the different forms they take
If you’d like to practise the material covered in this video, check out our platform at www.cognitoedu.org - it's totally free, and has built specifically to make learning and revision as quick and easy as possible. The main features are:
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Amadeus & Tom
Hi, this is extremely helpful because I’ve got my GCSEs year 9 in just under a week and I have really enjoyed the parts on this with the drawings and notes so thank you so muchhhhh!
I watched this one day before my biology science test, and I got a Grade 8. That's the highest I've ever gotten in a science test. Thank you so much Cognito!
That's brilliant, well done! 👏
BRO SAME. MY BIOLOGY PPE EXAM IS TOMORROW LMAO
@@Cognitoedusame my bio exam (final) is tommorow thanks cognito
I should watch the video instead of reading comments
My history exam is tomorrow thanks cognito
10 pages condensed into 5 mins lol
Lol
Fr
Relate much 😅
Fr
Shut up lol
Hi, I just wanna say a huge thank you to the creators of this channel, I use your website on a daily basis! These videos are honestly carrying my GCSEs!
Aw thank you so much Ayesha, hope the GCSEs go well 🙏
How did they go
I’m doing my final mocks at the minute ( I do triple science) and honestly you are so underrated ! Your videos are so helpful, especially the drawings and diagrams
I’m doing my first set of mocks now T-T
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@Strine f :) I’m going into year 10 too
Please you need to make a level versions of this as well. Because this is so so helpful!
It's so disappointing that a certified book is more complicated than just a simple video on RUclips
Fr If i knew i woulda spent the £6 for gcp textbook for some brainfood
*cough* *cough* cgp
gcse's in 3 days and this is the best ive learnt all year ur channel is a big help
And now it’s tomorrow 😀
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There's also another approach to memorise the phases of mitosis which is the P.M.A.T strategy (prophase, metaphase, anaphase, telophase.) including Cytokinesis which is just the separation/division into daughter cells also when alienation/division takes place a nucleus is formed as well :)
I think there is another step called interphase
biology tomorow guys😁
😢
bro is cooked
me too
update??
what did the cell say to the other cell that stepped on its toes?
mi to sis
hahah anyways these videos are great i love them
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Hi Em, thanks so much for the comment - really happy you found it useful!
GCSEs in 2 days guys😭
ikr tm and ima done for
Mines in 8 and I just started all my revision today 😭
i honestly dunno how theyre teaching me this in gr7 but its way easier here to understand. Thank you, Cognito!
You are the only channel that helps me understand science really well !! thanks :)
Do you cover all biology topics for triple science?
Hi Julia, we have some left to release, but yes we’ll cover everything bar the practicals :)
Thank you so much for all your videos. I am watching them all for Biology, Chemistry and Geography GSCE to make sure I know all the content. In preparation for A level. They are so helpful so thank you!
i have my paper 1 tomorrow! thank you!!
I was struggling with inheritance but you've helped a lot. Thank you, sir!
i love your videos thank you i have tests tommorow and this is realy helping can you make more
Gosh these videos are way to well made and easy to understand... honestly unfair for other students
So helpful. Finally understand Mitosis, thank you 🙏
love you work, helped me a lot on all the science subjects tysm... keep it up 👆
Thanks so much for this video! I just wanted to ask if this was made for edexel or aqa (or any other exam board) thanks again :)
Thank you! This video was exactly what I was looking for! I subscribed straight away lol ♡
Thankyou, it's great to have you as a subscriber!!
Thank you for making these videos - they are really helpful!
do your videos cover the whole biology GCSE content?
How does this channel make something that takes like an hour to teach in class make sense in 15 minutes or less.
amazing bro appreciate your hard work
Wait so what is the second stage called after interphase??
I started using this in grade 10 and cognito helped me so much tysm cognito u explained hours work in a few mins
Every other animal: am I joke to you
This better help coz my exams are in now less than a week and after asking for 2 years for extra support and a reader in my exams they have decided for both and I don’t get very high grade 2 at most so when I do my exam I really hope I can remember this but it was so helpful thank you
exams today mate, i hope it goes well for you, may you come out with a good grade, bless you💞
Best of luck for tomorrow guys
We've got this!
lol I also have the gcse biology exam tomorrow. i’m predicted a 7 in science and I should do quite well on this exam. it’s just a few things like this that I need to brush up on. cognito is the best for that kinda stuff
Please make videos for a level biology as well. Your videos have helped me so much with science and I would find it so beneficial if I were able to use them for the next few years.
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thanks mate so useful i can now teach it to my year threes
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So then what is differentiation?
I like your videos even before watching😅
anyone who needs it here r the notes:
Cell cycles,chromosomes and mitosis
- All multicellular organisms (humans, animals) require a continuous supply of new cells
- For growth (younger children) ,development and repair (skin cells which constantly fall off)
- Process which these cells are generated cakes the cell cycle (life cycle of cell)
- Growth, DNA replication + mitosis , division (cytokinesis)
- Step one...cell grows in size and increases the number of sub secular structures it contains (mitochondria, ribosomes)
- Step 2... DNA (chromosomes) is replicated so the 2 new cells will have a full set of DNA, but the duplicate stays attached to the other chromosomes that it was copied from (x shape)
- Step 3... When ready to divide, all 46 chromosomes line up in cell centre and cell fibres from each side of cell attach to the half of the chromosome, and they pull the half of the chromosome to the opposite sides of the cell (opposite poles) breaking them into halves
- Step 4... Division ... Cell membrane and cytoplasm pull apart forming 2 daughter cells ( each cells have the same DNA and are identical)
Love my guy
i have my gcse in 5 days but can only revise for like 3 hrs and i haven't revisised im on a grade 3 lets see what i get with this vid. the ultimate test !
INSHA ALLAH YOU PASSED EMAAN
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@@emaanfaruki6846 thats goodddd, hopefully ur studying paid off !!
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Might as well throw out my old book u taught me more than it has ever done in 5 minutes ⭐️
Hello Is it also suitable for triple science students? Btw thank-you 😊❤
yes, it is :) if you go on their website, you can filter it exactly to your course, such as "higher or foundation, triple or combined and it also has options for whether you're doing AQA GCSE or Edexcel GCSE, etc" It has all the topics with videos and example practice questions. Highly recommend it :)
Dear Cognito, thank you for helping my exams. 😊😊
So you say humans have 23 pairs of chromosomes.. does that mean 23 pairs of chromosomes in every body cell?
Hi Fly - almost. Sex cells like egg and sperm cells actually only have 23, and our red blood cells don't have any chromosomes.
@Alishba Khan theres 23 pairs of chromosomes...
what is 22 pairs is autosomes..
@Alishba Khan theres 23 pairs of chromosomes...
what is 22 pairs is autosomes..
Thank you so much this really helped
Episode 69 should have been about meiosis and fertilisation😮💨
WHOAAA🤣🤣
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Damn straight brother 😎😂
but why do they duplicate i’m confused
coming back after a year of GCSE's and bro thanks to you i got a B in science!
come back! ramadan kareem❤
Got an A+ , thanks 😊
Great Video Mate.
Wait which bit is mitosis he didn’t clarify it?
This really helped :)
Me dose not revise and gets a pass: I have big brain 🧠
Is this video 46 or 48 I'm quite confused since, the title says 4. Thanks!
It's the fourth video in the biology playlist, that's what it means
@@somanytvshowshavecausedmee899 thanks luv
@@robot3507 np
cognito has helped me in so many tests in my school year and probably will help me in my universities thanyou Cognito
2 days until my biology exam 😬
1 day 😢
how was it???
Imma ace my test, Thanks!!
Sounded like a CGP textbook lol
I'm here to do my science work
at this rate i don't even know who is going to fail!
do you have y7 videos
I totally don’t have my biology mock exam tomorrow 💀👀
I totally don`t have my biology mock on tuesday
Am in year 10 doing combined foundation exams in a week which could determine if I do higher ahhhh am stressed.
good luck
GCSE's next week lol
Biology mock tmrw
The thing i find hard is putting all this information to answer a exam styled question
try reading the mark schemes
I’m year 8 and I’m just watching this for revision
Thank you
Best teacher ever
Thanks for this😌🙏
You’re very welcome! Really great to hear they helped! 🥳
Cognito armyyy
U an ARMY? I'm a ARMYblinkmoomy (bts, blackpink, mamamoo, aespa)
thanks so much for this!
Thx
Thanks dude it’s so helpful
Thank you so much👍💯
30 pages in 5 minutes
Me when the walrus
Today’s the day😰
Let’s do this
anyone else here on the morning 💀
HE IS BRITISH!!!
yeah but so?!#%*
Commented
WE'RE PASSING OUT BIOLOGY TEST WITH THIS ONE LADS
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put speed on 2x lol
I live in Bangladesh I live in Bangladesh
Who asked
poopy love it
okei
Heh 69 nice 👌🏼
69
Good soup
Who’s here from 9W??
Jiggly wwi
so each cell in our bodies has 46 chromosomes?
Heya - nearly all of them. Sex cells like egg and sperm cells only have 23, and red blood cells don't have any.
Cognito does this mean then that when the sperm and egg join that the 23 in the sperm and the other 23 in the egg join to become 46?
@@libbyclayton1649 yes thats right haploid and haploid gamete fuses to form diploid zygote
knockknock itsvenom okay thank you
YOU DUM THERE IS 23 EACH NOT $^ THAT IS IN TOTAL
I did not enjoy this
Why? If you find it hard, watch it a few times.
Bad
L
In textbooks it is much more complicated and not obvious
Thank you
You’re super welcome! Thanks for the comment and support 🥂
Shut up fadumo
@@ibrahimmahmood6151 ??????
@@ibrahimmahmood6151 Why you saying shut up to everyone, lol?