PROTEIN SYNTHESIS - AQA A LEVEL BIOLOGY + EXAM QUESTION RUN THROUGH
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- เผยแพร่เมื่อ 29 ก.ค. 2024
- In this video, I explain EVERYTHING that you need to know for the "DNA + protein synthesis" chapter for AQA A Level Biology. The content crosses over with other exam boards too.
This includes: the concept of genomes and proteomes, mRNA and tRNA structure + the process of protein synthesis (transcription, splicing and translation). Time stamps are in the comments sect
ion.
I also go through a couple of exam style questions and their mark schemes.
Please comment below if you have any questions! :)
Images taken from:
blogspot.com
a-level-biology-notes.com
s-cool.com
00:30 = What is a genome + a proteome?
01:17 = Overview of protein synthesis
02:09 = mRNA + tRNA structure
04:13 = Transcription
06:04 = Splicing
07:22 = Translation
09:51 = Exam questions and mark schemes
A level Biology Help I would like to know if you have copy of these slides ?
@@saweraehsan8545 u better ss it
I’m so glad I found this video. I struggle with Biology so much. I’ve been watching videos on protein synthesis & I was still so confused, Then I found this & you explain it so well in a way that I find easier to understand. Thank you!
Ah I'm so glad! X
These videos are so helpful. I got an A* in my last test and I showed my teacher the channel and he's recommended it to the class
That's great to hear - so happy I could help!
I have my exams tomorrow and I’m going through these videos thank you for explaining it so well!!!
Us
I hope your exams went well!
How did the exam go? I got mine in a week so just wondering
Did you pass?
I didn’t understand protein synthesis at all until this video, thank you so much!!!!
Thank you so much, I appreciate this so much!!
your saving my life with these
Thank you so much ! 👍
Thank you!
Thank you very much that was very helpful and very well explained
Your videos are so helpful thank you so much
thank you so much for the video - i have my exam in 2 hours
thank youuu
Thankyou sm
In the slide, the second part of transcription is described as "free mRNA nucleotides align and pair with their complementary bases" but in the mark scheme for the exam question it is described as "RNA nucleotides attracted to exposed bases; (attraction) according to base pairing rule." I memorised what was on the slide but when I wrote it down for the exam question I dont think I would have got the mark because I didn't say anything about the nucleotides being attracted. Is what I wrote still okay opr should I try to learn the mark scheme instead?
Hi, I think that would still get the mark!
I have a query, please help me in understanding it. During translation, mRNA attaches to the start codon of ribosome OR Ribosome attaches to the start codon of mRNA? Which one of these has start codon, mRNA or ribosome?
Hi, it's the ribosome which has tRNA with a complementary anticodon that attaches to the start codon of the mRNA :)
Thank you
You're welcome!
Hi, I thought that RNA polymerase unwinds the DNA strand in transcription, as well as joining adjacent nucleotides together. Have I learnt this wrong?
It's DNA helicase that unwinds the DNA strands :)
do we not need to know about the enzymes involved within translation? Those that make the peptide bond and those that break the bond between the tRNA and amino acid?
Hi, you don't need to know that at A level :)
@@AlevelBiologyHelp thanks for your reply!
so fkin helpful, nice one!
In the very first exam question, it asks how mRNA is produced in the Nucleus. I thought you would right about Splicing as that makes mature mRNA from Pre-mRNA. However, you said you need to write about transcription, but why when in transcription Pre-mRNA is produced not mRNA????
You can write about splicing but it's mainly writing about transcription given that it's a 6 mark question (splicing doesn't have many steps so you can't get many marks on that). If you look at the mark scheme, you can write any 6 of the points there. :)
I love you