GCSE Biology Revision "DNA and the Genome"

GCSE workbooks www.amazon.co....
School licenses from 40p per copy www.freescienc...
In this video, we look at the basic structure of DNA and what is meant by a gene. We then explore the human genome.
This video is based on the AQA spec. If you are following a different exam board then you should check your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks.
Image credits:
Group of people commons.wikime...
DNA structure By Forluvoft - File:DNA simple2.svg, Public Domain, commons.wikime...
Music credit:
Deliberate Thought by Kevin MacLeod is licensed under a Creative Commons Attribution licence (creativecommon...)
Source: incompetech.com...
Artist: incompetech.com/

[@lolfunny9802]

They should make your intro music the national anthem

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LMAO

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[@47yid]

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It would be too difficult to sing.

[@huzaifasaeed9347]

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Facts

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We swear up in my school, never down

[@TamilEelam1]

@@beanstaIkjack The sun goes down and my zoot goes up 😂🤣

[@plutoniansza]

I learned more in this 3 and a half minute video than I did in my hour and a half biology lecture.

[@josh35639]

man said lecture, its gcse

[@lorigamingroblox3318]

@@josh35639 💀

[@MrCradds]

@@josh35639 a lecture is a lesson

[@Tom-hy9kf]

I think you have just saved my revision with 5 weeks to go!

[@TbKb89]

One day to go 🤣🙏

[@AlanAlan-mb5yu]

How was it

[@WhinedUp2004]

Try 37 minutes before what is effectively my gcse biology test

[@kianchristie3701]

I started this guy one day before my revision 😅

[@devynsavage2324]

WHAT MINS IN 5 DAYS

[@younglewpopedog2683]

Who’s listening to this banger 2020 quarantine???

[@willb6672]

Who's listening to this banger 2021 quarantine???

[@Kanirthi]

@@willb6672 yep

[@reisamiah462]

@@willb6672 yes bestie

[@Abdullah-fc4tm]

Who's listening to this banger in 2022 quarantine???

[@---nk3kc]

who’s listening to this banger 3674 worldwide quarantine?

[@MatthewGB]

this man about to carry me while schools are shut

[@pavanmardania217]

You still revising doe

[@leelajr8953]

Sceptor_ LITERALLY

[@soph-fj8ru]

Matthew currently watching this after being set it by my teachers lol

[@issysomething1077]

I have one week until my biology mock😬 I’ve been revising and really trying my hardest but it’s really difficult when I get distracted so easily. Thanks for these vids because without them I probably wouldn’t know anything 😂

[@lollipopping7990]

mine is tomorrow lol

[@hxdriian]

@@lollipopping7990 SAME :(

[@strawberry-ms2qc]

my gcse is tomorrow...

[@venus6987]

I have my mock in like 5 hours oh god

[@ItsMe-eu9br]

Good luck to anyone else doing GCSEs 2021.

[@therealgamebase]

thanks

[@mahahirji7512]

cancelled looool still got mocks tho :(

[@imma_eatjin]

😔

[@eimanbibi9433]

thanks

[@q1ta]

ty man

[@ridahrahman8710]

you have helped me so much thank you i will recommend this youtuber you made me get 9 in tripple science tyyyyyyyyyyyy

[@adamsidat4766]

Could you please explain the techniques that helped you geet a grade 9

[@fantasybricks4160]

You have got to admit that the theme tune is a absolutely banger lol!

[@tal8865]

I have an exam next week and you've saved me

[@Freesciencelessons]

I'm happy to have helped.

[@liyaiddi]

this man is single-handedly saving my grades!!

[@yusufsheikh5075]

WHAT HAPPENED TO UR SMILEEEEEEEEEE. U used to do it at the end of the video.

[@maryatsukki3670]

yusuf sheikh how old are u

[@holyfknsmokesigotmymoneyup]

lmao @@verneer9684

[@spartn_7]

@@maryatsukki3670 bro got aired for 5 years

[@l3mar260]

thanks sir this actually helped a lot if more people revised before the age of 15 then maybe you'd get more subs

[@gh0stygal]

got my final biology paper 2 mock and these videos are saving my revision omg it’s march and i’ve only just started revising

[@Harshaplayz]

still earlier than a lot of people

[@huzaifasaeed9347]

Same

[@김예림유영차준환]

you’ve pulled me through my GCSEs

[@sharminbiology7147]

Its really easy to understand. Thanks for making this helpful video.

[@blueraspberry2928]

@akuma1995same I still don’t understand

[@anitabluee]

icl i would be screwed without freesciencelessons like bro i need to pass this PPE

[@ysamendoza2821]

BLESS YOU'VE STARTED PAPER 2 THANK YOU SO MUCH, can i suggest you do B7 because i feel like most schools are running out of time to teach it (well at least my school)

[@gregcorcoran2847]

www.Ysa.co.uk lots of schools are running out of time to teach , it’s a nightmare 😅

[@essk8761]

hi ysabel

[@essk8761]

i think most schools is just our school

[@thesameritan9844]

Mocks in 2 weeks gcses are in +/-7 weeks, these videos are really helpful, thanks!

[@thewelsh-lad8719]

Good luck for tomorrow!

[@CoryJT]

thanks

[@alexireade3408]

The Loyalist dude don’t know why your watching this 2 weeks ago, this is paper 2, hope paper 1 went ok 😂

[@rgxll9315]

Thanks

[@nebulamobile2400]

I'm a genome and you've been genomeddddddd

[@jamessykes8756]

In the exam, can we use 'genetic material' and 'genetic information' interchangeably?

[@Freesciencelessons]

No because genetic material suggests DNA whereas genetic information suggests genotype.

[@jamessykes8756]

okay thanks

[@lcfcsince2016]

@@Freesciencelessons thanks for clarifying

[@aieshabegum2025]

Can you publish the workout books for chemistry and physics as you have finished all the videos?

[@potterhead9348]

Life saver!

[@faizahbegum5171]

When do u think the ecology topic will be out because I haven’t learnt the content yet; do u think I should use a revision guide or wait for ur videos to come out because I learn from them better and more efficiently?

[@Freesciencelessons]

I'll be starting to upload the first ecology videos in around three days and they'll all be done in 2-3 weeks.

[@HarryGibb-so1fs]

cheers man you a real one

[@asifmahmoud126]

Sir as a combined science student,do I need to do Mutations,Protein Synthesis,Genetic Diagrams and the work of Mendel?

[@Freesciencelessons]

You do not need anything that say "Triple" in the title if you are doing combined science. So you do need genetic diagrams.

[@Shadzx01]

Thank you for all this 👼

[@acivilisedpersonofsociety7922]

*MY KING*

[@cw4490]

Me watching this 5 hrs before my gcse 😭

[@ismailadan418]

0:59 you said that this is enough for combined science but what about separate sciences?

[@and_reaa]

its in the next video

[@tahmidchoudhury1013]

When r u gonna do a video on the first rp for biology paper 1 the microscope one?

[@Freesciencelessons]

It will be on tomorrow.

[@tahmidchoudhury1013]

Freesciencelessons thx

[@yaboihi9055]

Hi I’m just wondering if their is agar jelly practical for diffusion that you have yet to get to or I’ve just missed, or is it even needed. Thankyou for all your hard work and I really appreciate these videos

[@gurditdosanjh460]

Sir, Im a higher tier student. Do I need to learn about DNA for cell biology?

[@harrisonedwards9075]

yeah

[@NHAA-d1s]

Have you done a video on Genetic inheritance (4.6.1.6 AQA Spec)?

[@gracebecks6812]

I HOPE ALL OF THESE ARE RELEASED BY MAY?!

[@Freesciencelessons]

They will be.

[@Gogoichigo5515]

Happy 2021

[@Sheena1234ization]

THX I HAVE A TEST ON B6.3 TOMORROW!!!

[@yellowforever794]

Sheena1234ization good luck

[@amybeeton7582]

wow I love this guy

[@lolamurray9310]

When will you be creating a Biology Paper 2 playlist for all this stuff about DNA?

[@rebeccalanyard9482]

HOW DO WE KNOW IF WE ARE DOING TRIPLE? IS THERE A PAPER 3 FOR TRIPLE??? PLEASE SOMEONE HELP AS I DONT WANT TO BE LEARNING THE WRONG STUFF

[@sugasalt5843]

You only do 2 papers for each science if you do triple science. The triple paper is 1 hr 45 mins long so if you've done a test that long for the science paper 1's then you most likely are doing triple.

[@richardmanner2530]

you are so helpful

[@daniellawal6003]

Thanks so much!

[@omarlasheen3364]

YOU ARE A KING

[@mystiic481]

Good Luck whoever u r

[@jisungsshinyforehead3246]

My saviour :,)

[@depression.9425]

everytime i hear DNA- I WANT IT THIS LOVEE {} I WANT IT REAL LOVEE but this video helps so much ty

[@weirdgirl3405]

ayy same XD

[@arsalkhawaja5865]

sir when will you make the videos on homeostasis???

[@joshm3059]

How long to these take to make?

[@priya200328]

Is Genome and Genotype the same?

[@Freesciencelessons]

No, the genotype is the specific combination of alleles leading to a characteristic (phenotype). The genome is all of the DNA contained within an organism.

[@angelsqt]

You're my idol! Ilysm

[@keyboardwarrior7728]

i was stressing in my exams 😅

[@daintydollyx]

hi my bio test is in 1 hour

[@carrieoff]

wheres the link for the workbook??

[@Anonymous-hj2ql]

Hyped for bio on the 11th?

[@alessiaoneill1337]

Dis is supa helpful a luv u man x

[@ephemeral8967]

Thank you, sir^^

[@PIERRE1]

my bro

[@shirleylam6656]

What’s the difference between genetic code and genes?

[@Freesciencelessons]

Genes are stretches of DNA which encode for the amino acid sequence of proteins. The genetic code is how genes do this.

[@patc1952]

Hello Jack

[@endurofordaboys1768]

sweet cheers

[@thetraveller9712]

Do higher students need to know what's in each chromosome?

[@bananabird7584]

DNA is whats in each chromosome.

[@westcreative9994]

Do we need to know the details in 2:08 and 1:41 ?

[@coleslaw4736]

Yes

[@nb9916]

We need to make this donny king of England 🏴󠁧󠁢󠁥󠁮󠁧󠁿

[@kyedo]

What if SNP that are found in higher rates of some illness's but have not been found to directly influence the disease to a great extent all point back to a loci that means that some of the genes will be turned on but in the wrong places while others may actually encode wrong due to the chromosome having the switch to turn on or off a gene aberrant to its normal function.

[@pavanmardania217]

Who s here while the lockdown due to Corona virus

[@JamesSmith-nl3mj]

How many nucleotides make up a gene?

[@ntugzz21idk37]

What is the function of DNA?

[@westcreative9994]

Do we need to know what DNA stands for in the exam?

[@aryankuram2129]

yes

[@Alex-uy7sc]

I went here because I was looking for the gnome meme

[@o_noe]

Did you find it?

[@atchek6304]

"a gene is a small section of DNA" funny coz that came up in P1 and wow what did i put= PROTEIN. i was like nooo its not gonna be that easy of a question dont get tricked...wow me...

[@LeahRebecca]

same :(((((

[@uzma191]

wait sorry does that mean you got the mark ?

[@oofiegang4161]

Anyone here the day before

[@robo7539]

what an alpha male

[@adambarnes382]

Help me

[@charlotteyerr2375]

Hi

[@Manraj7]

Bruh

[@zxchdontknow9168]

Why do I piss myself everytime he says chromosome

[@JulietteHayward-vk7rm]

'humans have literally thousands of genes, chromosome 9 has over 700 genes' Woah really? humans have 40 trillion cells and since there's 46 chromosomes per cell and >700 genes per chromosome, there would be 1,288,000,000,000,000,000 (1.288 quintillion) genes, so yeah, definitely more than thousands

[@Freesciencelessons]

I meant thousands of different genes acting in the genome rather than the total number of all the genes in all the cells. But you are right, it's a big number.

[@NinjaCokeGaming]

1st

[@jessneal5199]

last min craming anyone ????

[@meyakal]

bruh