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JessicaTSR
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#4281
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#4281
(Original post by Jake1313)
Inorganic means it does not contain carbon...so the majority of ions we have learnt
Awesome thanks loads!
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DavidYorkshireFTW
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#4282
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#4282
(Original post by James A)
I reckon the specimen paper is easier than the 2011 paper. Defo.
Oh dear, that's not good, i just bombed the specimen paper
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785695
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#4283
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#4283
(Original post by ahmmm)
this always ****ing confuses me - im not 100% sure but i think ATP binds to the myosin head when its attached to the actin, causing the dettachment and enabling the head to return to its original position for reattachment further down the actin filament??
yeah thats what 3 people have said, so i'll go with that! thanks!
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785695
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#4284
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#4284
(Original post by Jake1313)
ADP is needed for the bridge between the myosin head to bind to its binding site. This molecule of ADP is released. ATP is then needed to release the myosin head. It attaches to the head, releasing it. The ATP is then hydrolysed which provides the energy to return it to the original position. This leaves the ADP molecules on the myosin head and the cycle repeats.
thanks a lot for your help!
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jonnyb123
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#4285
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#4285
Ok so during genetic fingerprinting, after they have separated the strands and transferred the single stranded DNA fragments onto a nylon membrane they add DNA probes to it.

My question: Where are these probes taken from? Is it from the person or animal the extracted sample is being tested against? If so then does the subsequent number of bands correspond to the chance it was the person or animal's DNA? Because I'm not really sure what the book is saying..
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Neenee1
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#4286
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#4286
Use of ATP in nitrogen cycle? What step is ATP used in?
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LitGeek94
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#4287
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#4287
(Original post by AVB)
Photolysis of water - Photosynthesis
Biproduct of respiration
Plants (Turgidity, Apoplastic/symplastic pathways)
Fish gaseous exchange
Organisms live in water (an incredibly obvious point but one that not only is correct but technically is outside the specification)


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Thanks! I was literally just finishing the plan for it haha
Does eutrophication count?
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F1's Finest
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#4288
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#4288
(Original post by DavidYorkshireFTW)
Oh dear, that's not good, i just bombed the specimen paper
The thing with the specimen paper though is it had loads of 1 marker questions. I seem to perform better in the 1 markers than the 2 markers (and 3 markers) haha
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AVB
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#4289
(Original post by MLogan)
Im so happy that atleast,unlike edexcel, we can talk about the exam as soon as it is done! Hopefully we've all got something good to talk about! I'm sure this can not get worse than the edexcel C3 paper :|
Haha C3 has literally completely deflated me for the rest of my exams...


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Jake1313
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#4290
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#4290
(Original post by Neenee1)
Use of ATP in nitrogen cycle? What step is ATP used in?
Used to actively transport the nitrate ions into root cells.
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AVB
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#4291
(Original post by LitGeek94)
Thanks! I was literally just finishing the plan for it haha
Does eutrophication count?
Didn't think about that actually haha but yeah I'd say that's a good thing to talk about


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JessicaTSR
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#4292
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#4292
(Original post by starfish232)
they're ions that are vital for cellular activity and don't contain carbon such as Ca2+,Mg, Na+ and K+,etc
Thanks!
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iPthreefifthteen
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#4293
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#4293
Has anyone got the document with the plans for all the essays?

Thanks, would really appreciate it
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sophie15
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#4294
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#4294
Could someone briefly summarise the Sanger method please?
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MLogan
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#4295
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#4295
(Original post by AVB)
Haha C3 has literally completely deflated me for the rest of my exams...


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Yep for me too!! But the fact that this is my last exam got me through!!
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AVB
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#4296
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#4296
Could anybody summarise transcription factors for me please?

It's something I haven't revised and I don't have a text book/revision guide on me...


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Jake1313
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#4297
(Original post by jonnyb123)
Ok so during genetic fingerprinting, after they have separated the strands and transferred the single stranded DNA fragments onto a nylon membrane they add DNA probes to it.

My question: Where are these probes taken from? Is it from the person or animal the extracted sample is being tested against? If so then does the subsequent number of bands correspond to the chance it was the person or animal's DNA? Because I'm not really sure what the book is saying..
DNA probes are man made. The number of bands corresponds to where the probe has annealed. As people have different core sequences, the pattern will be different for genetically different people.
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F1's Finest
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#4298
Guys, can we have a clarification on what kinesis and taxis is?
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AVB
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#4299
(Original post by MLogan)
Yep for me too!! But the fact that this is my last exam got me through!!
You not doing C4? I've still got C4 and Physics left after tomorrow


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Samj95
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#4300
(Original post by jonnyb123)
Ok so during genetic fingerprinting, after they have separated the strands and transferred the single stranded DNA fragments onto a nylon membrane they add DNA probes to it.

My question: Where are these probes taken from? Is it from the person or animal the extracted sample is being tested against? If so then does the subsequent number of bands correspond to the chance it was the person or animal's DNA? Because I'm not really sure what the book is saying..
probe is complementary to the persons dna you are testing for example a father to see if its his son, the son will have the same dna as the father so the probe should bind to the childs dna, the probe will have a marker i prefer saying florescent and then you shine uv light on it and if the probe is attached it will show up
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