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AQA AS Biology 7401/1 and 7401/2 Exam - 26th May and 7th June 2016

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[QUOTE=lottie.elson;64973443]One of my teachers thinks heart diseases as we don't need to know them in detail as if we had a question on them the information would be given and then we have to apply it to the heart but that's the only one I've heard so far
Oh like they might ask why the ventricles are thicker (example)
Original post by Glentothecoco
DNA HELICASE unwinds the double help and breaks h bonds between bases
Strands seperate
ONE strand acts as a template
Free RNA nucleotides are attracted to the exposed bases
RNA nucleotides bind to bases on DNA via complementary base paring (A-T C-G)
RNA POLYMERASE joins the RNA nucleotides together to form the new strand (by phosphodiester bonds)
This is pre-MRNA
Pre-MRNA is spliced to remove introns and join exons and forms mRNA

mRNA leaves the nucleus via pore
Attaches to a ribosome
Sequence of bases on mRNA determines the sequences of amino acids
Specific tRNA molecules bring and Carry specific amino acids to the ribosome
Anticodon on tRNA is complementary to codon on mRNA so they bind
Adjacent amino acids form peptide bonds
tRNA detaches into the cytoplasm
Gets another amino acid
And the process continues


Our teacher tells us that RNA polymerase unwinds the DNA strand as it is only partial unwinding (unlike in DNA replication) and also creates the phosphodiester bonds? Are you sure it is DNA helicase that does it Transcription?
Original post by lottie.elson
I find example questions the best as I struggle with exam technique, there's definitely a specific way to answer the questions but my school has been really good in providing questions that relate to the new specification!:smile:



My school hasn't been as helpful with relating to the new spec, could you post some of the questions if they're saved documents? :smile:
Original post by Glentothecoco
DNA HELICASE unwinds the double help and breaks h bonds between bases
Strands seperate
ONE strand acts as a template
Free RNA nucleotides are attracted to the exposed bases
RNA nucleotides bind to bases on DNA via complementary base paring (A-T C-G)
RNA POLYMERASE joins the RNA nucleotides together to form the new strand (by phosphodiester bonds)
This is pre-MRNA
Pre-MRNA is spliced to remove introns and join exons and forms mRNA

mRNA leaves the nucleus via pore
Attaches to a ribosome
Sequence of bases on mRNA determines the sequences of amino acids
Specific tRNA molecules bring and Carry specific amino acids to the ribosome
Anticodon on tRNA is complementary to codon on mRNA so they bind
Adjacent amino acids form peptide bonds
tRNA detaches into the cytoplasm
Gets another amino acid
And the process continues


Thanks I appreciate it :smile: one of my teacher thinks this could be a six mark question


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does anyone have any set of questions that are good for the new spec?
Original post by Natashja
Yeah its in the digestion and absorption section of the spec :smile: of how proteins are absorbed by endopeptidases, exopeptidases and membrane-bounddipeptidases.This link should helphttp://filestore.aqa.org.uk/resources/biology/AQA-7401-7402-TN-PROTEIN-DIGEST.PDF


Hi, has anybody got the answers for these questions?
does anyone have any predictions for the biology exams, new spec
is there any difference between the two biology papers or are they both on the same things?
Here are all my notes done to the spec if anyone needs some x
AQA BIOLOGY UNIT 1.docx318.2KB
Original post by Student14141
Here are all my notes done to the spec if anyone needs some x


Could you DM me them please? Link isn't working :-(


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Original post by Student14141
Here are all my notes done to the spec if anyone needs some x


Any chance of having it in pdf?
Original post by 123chem
Any chance of having it in pdf?


hi let me know if it works x
AQA BIOLOGY UNIT 1.pdf686.7KB
Original post by Clintbarton
Could you DM me them please? Link isn't working :-(



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try this pdf x
AQA BIOLOGY UNIT 1.pdf686.7KB
Original post by Student14141
Here are all my notes done to the spec if anyone needs some x


Hello is this new spec? I see cholera and I don't think it's in the reformed spec :smile: but thank you for this! x
Original post by rosemondtan
Hello is this new spec? I see cholera and I don't think it's in the reformed spec :smile: but thank you for this! x


this was for the old spec but there are still exams in it this year so thought i would post :smile: you're welcome x
Original post by Student14141
hi let me know if it works x


Works, cheers~
Original post by Student14141
hi let me know if it works x


This is really helpful, thanks


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hey guys any predictions for the exams for aqa bio AS
Hi, has anyone found the specimen papers/ Teachers only specimen materials deceptively easy?
Exam predictions?


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