AQA A2 Biology BIOL5 - 17th June 2015

Reply 780

djhodnett

9

Original post by EmilyC96

And salty soil

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oh yeah cant forget the use of pointless studies into the research of growing a vegetable in salty soil :colonhash:

Reply 781

charlottei

11

Original post by C.R.E.A.M

I havent done any specific studies off spec either! Theres only a couple of marks for that in the essay so I'm just leaving it and hoping the essay that comes up will be on something i may have extra info on, but if not its only a couple of marks

Yeah, this is what I'm thinking! But unfortunately it doesn't stop me from feeling unprepared xD

Reply 782

MrPolish

2

ugh so little time to revise for this >.< i have chem tomorrow, maths on tuesday and biol on wednesday..
anywhoo, could someone help me out with fast twitch muscles and slow twitch muscles ?

Reply 783

KimSmith1234

2

Am i the only one that hasnt started revision for this yet?

Reply 784

Nchomuzinda

2

Everyone that I know has predicted Co2 or DNA technology to come up for the 20 marker. But since AQA have recently "rewritten" our paper I doubt any predictions are likely to be correct :/

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Reply 785

Nchomuzinda

2

25*

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Reply 786

SamuelSingleton

13

Original post by Nchomuzinda

Everyone that I know has predicted Co2 or DNA technology to come up for the 20 marker. But since AQA have recently "rewritten" our paper I doubt any predictions are likely to be correct :/

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Original post by Nchomuzinda

25*

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you realise exams get to the schools either on the day or the friday before (if it's a monday exam) not over a week in advance ... so it's unlikely any of those papers were biol5. plus they backdate them so we would have been given next years paper if biol5 was "stolen" but like i said...unlikely

Reply 787

SamuelSingleton

13

Original post by Ozy96

Does anyone know the chances of someone having the same genetic fingerprint as you? As in the same core sequences, it will be useful if the essay is about DNA and I can go on about talking on the forensic side of it.
I'm not too sure I think it was 1 in 15million people but google is giving me different figures

if you're talking about minisatellites it's incalculable they differ from person to person
if you think just from meiosis alone it's 1/2^23 * 1/2^23 * chance of random fertilization of 2 identical gametes (basically 1 in infinite) unless of course they're identical twins in which case it would be 1

Reply 788

Nchomuzinda

2

Original post by SamuelSingleton

you realise exams get to the schools either on the day or the friday before (if it's a monday exam) not over a week in advance ... so it's unlikely any of those papers were biol5. plus they backdate them so we would have been given next years paper if biol5 was "stolen" but like i said...unlikely

Yeah you're right, but the point is...they've still changed this years paper.

http://www.theguardian.com/education/2015/jun/11/exams-rewritten-after-van-containing-papers-stolen

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Reply 789

SamuelSingleton

13

Original post by Nchomuzinda

Yeah you're right, but the point is...they've still changed this years paper.

http://www.theguardian.com/education/2015/jun/11/exams-rewritten-after-van-containing-papers-stolen

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that was written on thursday for something that happened 2 weeks ago now... they would have been predominantly GCSE papers and not this years unit 5 biology .. they don't send papers out any more than 3 days in advance!
so any predictions can still come up

Reply 790

Nchomuzinda

2

Original post by SamuelSingleton

that was written on thursday for something that happened 2 weeks ago now... they would have been predominantly GCSE papers and not this years unit 5 biology .. they don't send papers out any more than 3 days in advance!
so any predictions can still come up

Alright. What do you think the essay will be ?

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Reply 791

Beckyboo308

Original post by SamuelSingleton

that was written on thursday for something that happened 2 weeks ago now... they would have been predominantly GCSE papers and not this years unit 5 biology .. they don't send papers out any more than 3 days in advance!
so any predictions can still come up

This biology paper was one of the papers stolen

Original post by Beckyboo308

This biology paper was one of the papers stolen

GReaaaaaat, now we can have 'non biology related' questions everywhere since they'll make them up on the spot.

Reply 793

EmilyC96

3

Has anyone actually asked their teacher about it and if it's true?

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Reply 794

chloehx21

2

can anyone tell me about oestrogen acting as a transcriptional factor? in my book it says it can act as a repressor or activator but in the 2010 paper i think it was it just has the answer for activator and the question didnt suggest this either... help!

Reply 795

tofaeal

8

Can someone explain to me genetic fingerprint and the process pls!!

(edited 8 years ago)

Reply 796

Nchomuzinda

2

Original post by chloehx21

can anyone tell me about oestrogen acting as a transcriptional factor? in my book it says it can act as a repressor or activator but in the 2010 paper i think it was it just has the answer for activator and the question didnt suggest this either... help!

Oestrogen isn't a transcriptional factor, it acts like a non competive inhibitor. Oestrogen binds to receptor protein in DNA. This causes the receptor protein to change shape and the inhibitor molecule bound to the receptor site is released(this was the molecule preventing transcription). Receptor site is free and the transcriptional factor binds to the receptor site which stimulates transcription.

Reply 797

hiyaitsnikitaaa

2

how much gene tech do people think will be on the paper, its very very confusing and very content heavy, can anyone summarise?

Reply 798

evavanh

1

does anyone know what the difference is between a gene marker and a DNA probe?

Reply 799

humblekingdom

5

Hi, I was just wondering have people learnt about Cystic Fibrosis and SCID as exaples of gene therapy etc
It's in the AQA T&T text book but the speciifcation literally just says

' The use of gene therapy to supplement defective genes' and Candidates should be able to evaluate the effectiveness of gene therapy

So do I need to learn the specific examples of Cystic Fibrosis and SCID or not?

AQA A2 Biology BIOL5 - 17th June 2015

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