GCSE Biology Revision "Mutations" (Triple)

[@aaliyaah5328]

Ya'll better be watching the ads on these videos

[@shazmeertv44]

Why

[@Abdullah-fc4tm]

@@shazmeertv44 the dude provides GREAT education and makes everything easy to understand FOR FREE. Why not support the dude by watching the ads?

[@iconichisoka7642]

most def won’t ❤️😍

[@DJreeik]

@@Abdullah-fc4tm cos it’s last minute revision and we can’t afford to waste time by watching ads

[@mikyounglee6644]

Congrats on 100k!!

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2 years on and 427K, crazy!

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@@safwaanchowdhury8260 592k now!

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@@shaheerchaudhry9459 625K now

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@@deqohanshi5113 636 now

[@gracebryony8134]

Anyone here after the school closure announcement March 2020 frantically revising for last minute mocks???

[@papantro792]

"2 week break"

[@dawudamin1815]

Damn this was 4 yrs ago time flies

[@mollypass6292]

I find your videos very helpful, do you think you could do the a level course as I'm​ doing it next year?

[@HexaFrog]

he started those now!

[@godximroz7892]

@@HexaFrog there is no point Now he has done his a level

[@moppy4049]

Exam is tommorow GL Guys!

[@revision886]

Möppy good luck :)

[@jamescaddick1183]

Im so nervous. I literally know nothing. my teacher is awful 😬

[@MrEddsrailsGaming]

Good Luck!

[@rahulsagu1157]

Good luck!

[@soorajgijo7065]

@@jamescaddick1183 So youve got ur results back... how did u do

[@enlightenedbanana]

The lord is back

[@nuriashafqat7130]

Thank you so much! I just have one question, if a mutation occurs, does that alter the complementary base pairing? And so does that cause another mutation?

[@Freesciencelessons]

Yes that can happen. There are other types of mutation as well as the ones shown in the video.

[@farhannahmaca-agal9035]

My college entrance exam is 1 week before now, these is really helpful I hope I can make it

[@mousagulzar]

Did you get in?

[@taiyyib7229]

@@mousagulzar fr bro i been waiting for two years

[@pakistanimilitaryedits1793]

@@taiyyib7229 ive been waiting for 4 years lmao

[@sophiayuchen6359]

do we need to know about gene expression because its in my aqa textbook? if so can you briefly describe it because i don't really understand it. thanks a lot

[@Freesciencelessons]

That's covered in the video on protein synthesis. www.freesciencelessons.co.uk/gcse-biology-paper-2/inheritance-old/protein-synthesis-triple/

[@Jonas-wb1pb]

what a legend

[@anushajindani2117]

Mutation is the formation of the first DNA strand abnormal?

[@bobbysanders8238]

Hi Sir, thanks for the video! but i just wanted to ask if the gene is switched off when its meant to be on what effects could this have? thank you.

[@Freesciencelessons]

If a gene is switched off then that cell will not make the protein encoded by the gene. This could have a minor effect for example if another protein can carry out a similar function. However, it could have a dramatic effect. For example, certain genes produce proteins involved in regulating the cell cycle. If one of these is turned off, that could cause the cell to undergo uncontrolled mitosis, leading to a tumour.

[@bobbysanders8238]

@@Freesciencelessons Thank you!

[@arzumbilen8690]

Sir isn't this topic also included in the combined science specification?

[@Freesciencelessons]

No combined science students are not expected to describe the effect of mutations on protein synthesis.

[@tobyford189]

Take the L son

[@jamesgardner5082]

@@tobyford189 bahaha

[@mehulgarg5083]

Thanks so much for this! I understand it now

[@raeyaansiddiqui9424]

Thanks :)

[@hannahahmed4028]

THANK YOU!!!!

[@Work-pf6si]

❤ GOODLUCK tomorrow everyone!

[@Judy-zf6dz]

Hello, I’m confused on the difference between genes and DNA? I thought it was DNA sequence that determines the amino acids, but here you have said its the base sequence of the gene. Are they interchangeable? Or is gene just one of the triplets of bases (e.g ATG) and the DNA is the entire sequence with multiple triplets of bases

[@Freesciencelessons]

A gene is a stretch of DNA that encodes for a specific protein. The base sequence of the DNA in the gene determines the amino sequence of the protein and these bases are read as triplets. Some genes contain a few hundred bases (or even fewer) and some contain hundreds of thousands of bases. Any DNA that is not in a gene is called non-coding DNA and in fact most DNA in a human is non-coding.

[@abey4827]

What’s the difference between a phenotype and genotype

[@esther1848]

a phenotype is an observable characteristic (something you can physically see) for example eye colour

[@ryou6453]

this inheritance topic is so freeeeeeeeee nbvm

[@tanbirh1514]

Hi on my textbook it tells me there are different types of mutations (e.g. deletions or insertions) - do we need to know this for the AQA specification?

[@Freesciencelessons]

No not for the AQA spec.

[@balicebali]

exam tomorrow :)) good luck everyone!

[@laalaa0000]

do we need to know the types of mutations like deletion and insertion for aqa? thanks

[@Freesciencelessons]

Those terms are not on the AQA spec. However, in the exam they could give you information on any type of mutation and ask you questions on it.

[@goodgoodfor5655]

Boyo

[@Bilal-g5b9j]

2023 🎉

[@mada7653]

exam is tomorrow:/

[@shaheerchaudhry9459]

How did you do?

[@josephc9742]

11ts3

[@adilhussain1432]

ngl this is hard