A2 Biology OCR June 2015 Revision Thread

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Reply 4300

buxtonarmy

The first long answer on meiosis was a god send.

Who predicted that yesterday?!

Reply 4301

kewla1

Original post by NilaJ

That's what I put

what automated dna question????????!!!!!!!!!!!!

Reply 4302

Lizzieee4

Original post by Brownclown

What did people put for the elk crap? I BS about predator prey relationship, competitive exclusion principle, abiotic and biotic factors and carrying capacity

I basically just threw everything I knew on the topic in and half of it was irrelevant lol

Pretty much the same ahaha. I wrote something like the wolves will eat rabbits that also are herbivores so there's more food for the deer so their numbers increased. But I put in abiotic, predator prey etc ahaha

Reply 4303

Ahem-

Original post by Brownclown

Intraspecific competion, carrying capacity, density dependent factors, predator-prey..basically a load of nonsense

Reply 4304

ellyphhant

IN NEED OF AN UNOFFICIAL MARK SCHEME
someones gonna have to take one for the team and make it?!!
please please please?

Reply 4305

ijc1

Original post by p208134

I put mitosis for the first than meiosis...
Also for the saliva one I said saliva... that is where the genetic material is coming from :P
Although i just realsied it came from white blood cells -.-

I wrote cheek cells. Do you think I'd get a mark??

Reply 4306

p208134

Original post by Jacob Choi

I said it came from amino acids in digestive enzymes

Apparentely it was about cheek cells falling into the saliva.. don't know how we'd know that but it makes sense i guess

Reply 4307

Brownclown

Ocr exams aren't a test of biology they're a test of common knowledge and that annoys me so much

bye future :smile:

Original post by ijc1

I wrote cheek cells. Do you think I'd get a mark??

I wrote cheek cells aswell lol hopefully we get the mark

Reply 4310

kewla1

Original post by Ahem-

Intraspecific competion, carrying capacity, density dependent factors, predator-prey..basically a load of nonsense

Would intra and interspecific competition be okay?

Reply 4311

Ahem-

Original post by kewla1

Would intra and interspecific competition be okay?

I guess so

Reply 4312

RichBitch

Original post by Brownclown

Ocr exams aren't a test of biology they're a test of common knowledge and that annoys me so much

EXACTLY WTF

Posted from TSR Mobile

Reply 4313

WesterosWildling

Original post by p208134

Apparentely it was about cheek cells falling into the saliva.. don't know how we'd know that but it makes sense i guess

YES

Posted from TSR Mobile

Reply 4314

Ahem-

Ive got 20-25 ums to play with, hopefully i've got atleast a low B to get thd A overall.

Reply 4315

kewla1

What was the question about electrophoresis?! I may have missed a page

Reply 4316

Aidenjordan

Original post by kewla1

What was the question about electrophoresis?! I may have missed a page

It didn't mention electrophoresis but asked about a way to order DNA fragments by size. The answer was electrophoresis

Reply 4317

ijc1

Tbh I hope grade boundaries are lower than last year (last year was 63 for an A). The exam timetables this yesr were ridiculous, having f325 and f215 one day apart so i think people didn't get to revise as much whereas compared to last year there was like a 4 day gap between them, but I have no idea lol probably just my wishful thinking.. This year's papers could have been easier or harder too. Lol i have no idea

Reply 4318

Peters97

I wasn't electrophoresis it was about fluorescent markers creating different wavelengths as the sequence is stopped meaning there is variation in size

Reply 4319

kewla1

Original post by Aidenjordan

It didn't mention electrophoresis but asked about a way to order DNA fragments by size. The answer was electrophoresis

OMG i think ive missed a page!!!!!! was it a 1 marker? :O :O
can you tell me about the questions after it so i can remember if i did it or not...I remember a question about PCR in the question which was a 4 marker after the drawing of the stuff but idk