A2 Biology OCR June 2015 Revision Thread

Original post by NilaJ

UNOFFICIAL MARK SCHEME COMPLETE GOOGLE DOC, message me for any changes nobody can have permissions to edit sorry <3

https://docs.google.com/document/d/1sW_toUaWLpw7QcKANIHIUpIHleUwiZjA6nuZEo5-9Lg/edit?usp=sharing

THANK YOU!

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Reply 4862

SourSkittles

That question with the examples of innate and learned behaviour

Stupid me somehow misread it and named each example as 'innate' or 'learned', unaware you were supposed to specifically identify the behaviour.
5 easy marks out the bag right there

Also, what did everyone get for that question about how blah blah gets transported around the plant?

Reply 4863

Brownclown

6

Read that mark scheme with s pinch of salt - remember that OCR markschemes are very picky and are totally different to the student markscheme

Only use that markscheme as a very vague reference point

Reply 4864

Captain Anonymous

14

Predicted A boundary??

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Reply 4865

chelsiev

Original post by Unknown505

For the acetylcholine wouldn't it be sacrolemma as that is the post synaptic membrane??

That's what I wrote :s-smilie:

Reply 4866

bengali mandem

Original post by Captain Anonymous

Predicted A boundary??

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I already told you bro

67 :yes:

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Reply 4867

Captain Anonymous

14

I'm anticipating it same as last year from everyone's reactions I've seen so far

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Reply 4868

Captain Anonymous

14

Original post by bengali mandem

I already told you bro

67 :yes:

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Far too high, too high!!

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Reply 4869

NilaJ

Original post by Brownclown

Read that mark scheme with s pinch of salt - remember that OCR markschemes are very picky and are totally different to the student markscheme

Only use that markscheme as a very vague reference point

Yes I have stated this at the bottom of our mark scheme, we are not OCR, but its to help people.

Reply 4870

bengali mandem

Original post by Captain Anonymous

Far too high, too high!!

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Ok 65 then, but that's as low as it will go i think

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Reply 4871

Original post by NilaJ

UNOFFICIAL MARK SCHEME COMPLETE GOOGLE DOC, message me for any changes nobody can have permissions to edit sorry <3

https://docs.google.com/document/d/1sW_toUaWLpw7QcKANIHIUpIHleUwiZjA6nuZEo5-9Lg/edit?usp=sharing

With where acetylcholine receptors are found - surely this is the neuromuscular junction? Post synaptic membranes can have different neurotransmitter receptors after all, so it's not always receptors for acetylcholine

Reply 4872

jessicadanby1996

5

Original post by ChoccyPhilly

With where acetylcholine receptors are found - surely this is the neuromuscular junction? Post synaptic membranes can have different neurotransmitter receptors after all, so it's not always receptors for acetylcholine

it asked specifically where they are, and that is the post synaptic membrane

Reply 4873

Student23478

Can anyone confirm for salvia sample 1 marker for genetic information one (I think) did people put dna?? Or molecules in the mouth I put them 2 was not sure

Reply 4874

NilaJ

Original post by ChoccyPhilly

With where acetylcholine receptors are found - surely this is the neuromuscular junction? Post synaptic membranes can have different neurotransmitter receptors after all, so it's not always receptors for acetylcholine

Technically true, but they wanted to know where on which membrane, and that will probably be the answer, I'm sure there will be one accepting a muscular answer too

Reply 4875

Original post by jessicadanby1996

it asked specifically where they are, and that is the post synaptic membrane

But they are also specifically in the neuromuscular junction, are they not? Like I said, post synaptic membranes can have different receptors, so this isnt the case surely?

Reply 4876

jessicadanby1996

5

Original post by ChoccyPhilly

But they are also specifically in the neuromuscular junction, are they not? Like I said, post synaptic membranes can have different receptors, so this isnt the case surely?

well they're found on post synaptic membrane of the neuromuscular junctions. check the text book or google it i guess

Reply 4877

NilaJ

Original post by ChoccyPhilly

But they are also specifically in the neuromuscular junction, are they not? Like I said, post synaptic membranes can have different receptors, so this isnt the case surely?

Yes but when they are there they are found on the postsynaptic membrane

Reply 4878

meh, did ok according to the mark scheme. A bit fearful to look but probably got around 55 *sigh* No A for me :frown:

Reply 4879