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AQA A2 Biology BIOL5 - 17th June 2015

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Original post by bananainpyjamas
Do I have to remember the temperatures that occur in the PCR?

nope, just if it increases and decreases
Original post by kiwi8397
why are aqa such synaptic knobs


made my day :biggrin:
Original post by 13eyond13ithday
I had a psychology R paper this morning and it honestly seemed easier then most past papers so biology could be the same but I don't have any way of telling. The psychology one wasn't that much different, just less essays


Thats kinda good to hear, hope the BIOL5 one is the same too...


Original post by Bustamove
**** on a stick... I was right... I wish I wasn't...


yepp... suppose its kinda good, lets just hope the grade boundaries are very very low :biggrin:
Reply 1443
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Yaz97
2
Original post by mujtaba.khokhar
1434187269416.jpg
Its Confirmed we will be getting the 'R' paper, anyone got any advice on this? is it genuinely harder?


I did the psychology R paper today any it wasn't any harder than I was expecting, slightly easier in fact :biggrin:

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what is the cDNA used for after the thing with reverse transcriptase
Original post by 13eyond13ithday
I had a psychology R paper this morning and it honestly seemed easier then most past papers so biology could be the same but I don't have any way of telling. The psychology one wasn't that much different, just less essays


What does R mean?:angry:
Original post by Yaz97
No problem honey 💘

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why did you put a syringe through my heart??
Original post by Bethany_
What does R mean?:angry:


reserve?
Reply 1448
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TM96
8
Original post by thebest6633
what is the cDNA used for after the thing with reverse transcriptase


hybridises with the single strand of DNA made from reverse transcriptase which produces a double-stranded DNA molecule that has a complementary base sequence to the mRNA molecule initially used (cDNA obv complementary to the single-stranded one produced by reverse transcriptase)
Original post by Bethany_
What does R mean?:angry:


Ruthless
Original post by Bethany_
What does R mean?:angry:

reserve paper
Original post by Bethany_
What does R mean?:angry:


I've honestly no idea, the R is part of the paper reference/code which isn't normally there
Original post by Bethany_
What does R mean?:angry:


Replacement. I do maths edexcel and they always have 2 papers prepared, 01 and R so basicly if one gets released before the exam or stolen in this case, the exam board makes everyone do the Replacement one ( R ).
Reply 1453
Avatar for TM96
TM96
8
Original post by chemistrykid123
why did you put a syringe through my heart??


coz a knife is too gangsta.. u not heard of knife crime?.. its gotta stop
Original post by The fudge
reserve?


ooh probably actually, me being stupid:biggrin:
Original post by Bethany_
What does R mean?:angry:


someone said Retarded, but i doubt it....
Original post by chemistrykid123
why did you put a syringe through my heart??


if that syringe has drugs, aqa might ask you how they'll affect transmission across your synapses
Could someone explain restriction mapping please?
Original post by Bustamove
Can someone explain to me what is histamine and prostaglandins? what actually is their role? thanks


Hi I believe that Histamines- (within the white blood cells) they react to particular allergens e.g. pollen. This will increase permeability to capillaries e.g. swelling.

Prostaglandins (Cell membranes) Also dilate arteries causing swelling but these affect the pain receptors more due to injury by affecting blood pressure and transmission through neurones.

The key thing to remember here is that these are chemical mediators and these are different to hormones because they affect specific/ more direct to particular cells where hormones are more direct.
Original post by mujtaba.khokhar
someone said Retarded, but i doubt it....


Retarded:colone: well you never know with AQA....

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