i dont understand why for your method you say dna helicase unwinds the double helix but in other videos rna polymerase is joined at the start and the hydrogen bonds are broken ?? which is right
How much would you recommend the workbook? Is it full of exam style questions or more useful for the preliminary learning stage? Many thanks for all your videos!!
Your videos are so helpful for the IMAT too! After RNA polymerase joins the RNA bases with the complimentary DNA bases and pre-mRNA is created, what happens to the DNA strand that you took the bases from? Does it remain baseless? Or do the bases 'grow back'? Also since tRNA already has an amino acid attached to it, does this mean protein synthesis only refers to putting amino acids in the correct sequence to form a particular polypeptide? I used to think protein synthesis was the process of making an amino acid so I was a little confused. I'd be really grateful if you could clear this up for me since I have no base in biology.
In the Spec (3.4.3) for AQA, it states 'Gene mutations involve a change in the base sequence of chromosomes. They can arise spontaneously during DNA replication and include base deletion and base substitution. Due to the degenerate nature of the genetic code, not all base substitutions cause a change in the sequence of encoded amino acids. Mutagenic agents can increase the rate of gene mutation.' Are we just supposed to know that this can happen, or the detail of what the substitutions and deletions do? Also, is there a video covering this?
Hello, The main function of RER is to synthesise proteins as they have ribosomes. These proteins are then sent to the golgi to be processed and packaged. Hope that helps.
Hi, as your an experienced biology teacher, I wanted some advice..... I'm half way into yr 12 and I haven't made proper notes and have not consolidated content we have been taught. I have realised my mistake but I am wondering whether its too late to start as I know I want to do really well but I have also wasted half a year. Thank you so much
Hi! I'm probably not the person you're hoping an answer from, but if you search up 'Biology with Olivia' on a website called TES, she has condensed notes available for free for the whole of year 12! I have made my own notes as well, but they should be useful to you as it would be difficult to make notes alongside learning the rest of year 12 content. I hope it helps :)
Hey, Definitely not too late. If you are after notes, I have the full AQA A level notes available here. missestruch.co.uk/product/a-level-aqa-biology-notes-full-set-topics-1-8-copy/ These include all the theory for Y12 and Y13, highlight keywords and essay links for all topics. With these you won't need to make any extra notes, so instead you can focus on active revision strategies. Hope that helps 😁
@@freyaskuse6476 heyyy!!!! Thank you sooo much...... you didn't even have to help me but you did which was very kind of you! I looked it up and now only topic 1 is free and I have to pay for 2,3 and 4 but nonetheless those topic 1 noted will be very helpful..... I was thinking the same thing on how I will manage to learn new content while making notes for old content. Are you doing biology a level at the moment or have you already finished? Thank you so much once again
Please answer, some source state that it is RNA polymerase that does both unwinding and synthesis of the strand in transcription. But for DNA replication it is DNaA helicase . So it is RNA POLYMERASE that unwinds or helicase in transcription ?
DNA helicase unzips the DNA strand during DNA replication and it starts from the first hydrogen bond and travels to the end. But because the helicase enzyme can't 'see' where the specific genes it needs to unzip start(in transcription), RNA polymerase has to unzip the small sections of DNA instead as it knows where genes start and end. This is what my Biology teacher told me but it's better to just go with whatever your textbook says.
Hello, I’m currently really tempted to buy your A-Level biology notes for topics 1-8 but it’s a tad bit pricey is it possible to get the 25% bursary discount despite not being on bursary?
depends of the exam board. RNA polymerase joins adjacent RNA nucleotides together is the key marking point for AQA, but yes that is by phosphodiester bonds
Needed this, have my exam tomorrow. Another great video!
Best of luck for tomorrow!!! 🤞🤞🤞
good luck!
How’d it go?
@@crazywolf8019 Went well, got a B which is exactly what I needed
@@adxm0382 ayy, good on you :)
Thank you so much for your efforts the explanation is excellent and finally now i understood what is happening
Great video! Everything’s explained really well, thank you!
Thank you 😊 So pleased you liked it.
Thank you miss estruch
you're welcome 😊
Well explained I can't believe I understood today and I have my bio p2 exam tommorow
Hope it went well!
I actually understand it now wow
yay
you should have a beyond the spec section at the end for things beyond the spec but some people want to learn more i seen another channel do it
That's a great idea
I have my exam in an hour!! Thank UUU
I hope it went well!
How’d it go
@@crazywolf8019 It actually went really well!
@@domanidouglas9192 great! Glad it went good :)
OH MY DAYYYYSSSS TY SM!!!! THIS HAS RLLY HELPEDXXXX
So glad that it helped you so much!
Redoing my paper 1 mock from year 12 on thursday crazy how i learnt this in like 10 mins
wooo so glad it helped
Your Vids are Great!
Thank you :D Glad they are helping
So helpful
Glad it was helpful!
great video!
thank you 😊
Have my exam on Wednesday, amazing vid
Good luck!!
@@MissEstruchBiology i did alot better using your videos thank you !!! my teacher recommended you
Love this!!
thank you 😊
i dont understand why for your method you say dna helicase unwinds the double helix but in other videos rna polymerase is joined at the start and the hydrogen bonds are broken ?? which is right
thank u tea cher for explaining love u
thanks!
you're welcome 😊
How much would you recommend the workbook? Is it full of exam style questions or more useful for the preliminary learning stage? Many thanks for all your videos!!
Hey,
Which workbook are you referring to?
Glad you like the videos 😊
Your videos are so helpful for the IMAT too!
After RNA polymerase joins the RNA bases with the complimentary DNA bases and pre-mRNA is created, what happens to the DNA strand that you took the bases from? Does it remain baseless? Or do the bases 'grow back'?
Also since tRNA already has an amino acid attached to it, does this mean protein synthesis only refers to putting amino acids in the correct sequence to form a particular polypeptide?
I used to think protein synthesis was the process of making an amino acid so I was a little confused.
I'd be really grateful if you could clear this up for me since I have no base in biology.
Good luck with the IMAT, hope you got into medical school!
In the Spec (3.4.3) for AQA, it states 'Gene mutations involve a change in the base sequence of chromosomes. They can arise spontaneously during DNA replication and include base deletion and base substitution. Due to the degenerate nature of the genetic code, not all base substitutions cause a change in the sequence of encoded amino acids. Mutagenic agents can increase the rate of gene mutation.' Are we just supposed to know that this can happen, or the detail of what the substitutions and deletions do? Also, is there a video covering this?
THANK YOU!!!!! SO HELPFUL
you're welcome 😊 Glad you liked it
Is it not the enzyme rna polymerase which unwinds the helix?
no, but the cgp textbook says that in error. Any enzyme that is a polymerase makes a polymer
@@MissEstruchBiology oh ok thank you!
i think gyrase enzyme is what unwinds the helix
Can this work for edexcel b exam board too?
Hey, thanks for the vid! Is this still ok to revise from for the OCR exam board? Thank you!
yes! 😁
@@MissEstruchBiology awesome thanks so much!
Isn’t DNA gyrase the one responsible for the unwinding of the DNA double helix, miss?
in reality there is more than one. For AQA, DNA helicase is all that students need.
@@MissEstruchBiology I see, thanks miss!
Helpful video series! But doesn't rer do protein folding or do the Golgi and rear both do it?
Hello,
The main function of RER is to synthesise proteins as they have ribosomes. These proteins are then sent to the golgi to be processed and packaged.
Hope that helps.
@@MissEstruchBiology sorry, so rer does not do protein folding?
Thank you
you're welcome!
Hi, as your an experienced biology teacher, I wanted some advice..... I'm half way into yr 12 and I haven't made proper notes and have not consolidated content we have been taught. I have realised my mistake but I am wondering whether its too late to start as I know I want to do really well but I have also wasted half a year.
Thank you so much
Hi! I'm probably not the person you're hoping an answer from, but if you search up 'Biology with Olivia' on a website called TES, she has condensed notes available for free for the whole of year 12! I have made my own notes as well, but they should be useful to you as it would be difficult to make notes alongside learning the rest of year 12 content. I hope it helps :)
Hey,
Definitely not too late.
If you are after notes, I have the full AQA A level notes available here.
missestruch.co.uk/product/a-level-aqa-biology-notes-full-set-topics-1-8-copy/
These include all the theory for Y12 and Y13, highlight keywords and essay links for all topics. With these you won't need to make any extra notes, so instead you can focus on active revision strategies.
Hope that helps 😁
@@freyaskuse6476 heyyy!!!! Thank you sooo much...... you didn't even have to help me but you did which was very kind of you! I looked it up and now only topic 1 is free and I have to pay for 2,3 and 4 but nonetheless those topic 1 noted will be very helpful..... I was thinking the same thing on how I will manage to learn new content while making notes for old content. Are you doing biology a level at the moment or have you already finished?
Thank you so much once again
@@jencyauriavales4278 Hey I have her topics 1-4 notes, if you'd still like them? i can only send them as an email attachment though
@@jencyauriavales4278 Hi, I can send them now if you'd like? And no problem x
this is RAD dawg yhhhh
Please answer, some source state that it is RNA polymerase that does both unwinding and synthesis of the strand in transcription. But for DNA replication it is DNaA helicase . So it is RNA POLYMERASE that unwinds or helicase in transcription ?
DNA helicase unzips the DNA strand during DNA replication and it starts from the first hydrogen bond and travels to the end. But because the helicase enzyme can't 'see' where the specific genes it needs to unzip start(in transcription), RNA polymerase has to unzip the small sections of DNA instead as it knows where genes start and end. This is what my Biology teacher told me but it's better to just go with whatever your textbook says.
Hello, I’m currently really tempted to buy your A-Level biology notes for topics 1-8 but it’s a tad bit pricey is it possible to get the 25% bursary discount despite not being on bursary?
7:02 do we need to know the name of the enzyme for aqa
HERO
🤣 thank you 🦸♀️🦸♀️
❤️
Thank you 😊
I’m confused is it DNA helicase or RNA polymerase to break the hydrogen bonds at 3:35
DNA helicase breaks the H bonds
Yeah DNA helices breaks the bonds, RNA polymerase makes the phosphodiester bonds -- I believe
Hello, could we say free RNA nuclotides complantery pair with exposed base pairs or are we suppose to say free MRNA nuclotides???
hello,
RNA nucleotides should be sufficient as long as you refer to the fact it is forming mRNA somewhere in your answer.
@@MissEstruchBiology thank you
2 amino acids delivered by tRNA ????? Isn't it one
Also if u don't mind me asking aren't u meant to mention phosphodiester bonds forming in transcription pls respond😀
hello, two amino acids are delivered at a time by two different tRNA molecules.
depends of the exam board. RNA polymerase joins adjacent RNA nucleotides together is the key marking point for AQA, but yes that is by phosphodiester bonds
Legend you
😁😆 thank you!!!
bro stop