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OCR Biology F212 Revision [3rd June 2013] (Now Closed)

Reply 1600

Majeue

1

Original post by Liamnut

Welp, I just spoke about phagocytosis :3 I'm stuffed.

Nope you were right. You had to write about phagocytosos

Reply 1601

milworthy

1

Original post by Liamnut

The answers were in the question.

Red are more scared of humans, therefore they're harder to spot.
Red spend more time in trees, therefore they've harder to spot.

Of course, I jazzed up the answers a bit in the exam.

I agree with those answers I think they are right, but I think the recounting issue is correct too.

Reply 1602

NielsBohrsDad

Original post by krishkmistry

It said after its attatched to the phagocyte

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Phew. I was worried.

I wrote the stages of phagocytosis and then hoq rhey present their antigens for t.lymphocytes to be selected.

How.much wud that be

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Reply 1603

Munrot07

18

Original post by MrMeep2580

why the grey squirrel populus may be lower than the red squirrel even though the sampling of people says the opposite?

I put:
Red squirrels only come out at night, people not around at night.
Grey squirrels may be counted twice by two different people.

It said grey squirrels spend more time on the ground and are friendly to humans so i used them.

Reds will be in the trees so harder to spot and will run away from humans

Reply 1604

Liamnut

13

Wait, are awe allowed to talk about the exam lol?

Reply 1605

LaughingGas

5

Original post by krishkmistry

100% sure it said after its attatched to the phagocyte and phagocytosis is what I put too

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Yeah because when it's attached, it activates the phagocyte, and the phagocyte recognizes the Antigen as foreign? So the process of phagocytosis begins e.g. phagocytic vacuole produced etc.

Reply 1606

username1107833

2

Original post by Majeue

I put grey squirrels can fly so are often seen around and red squirrels are highly susceptible to getting eaten by dogs so they hide in the trees a lot.

Grey squirrels can fly? hahaha I don't think they can...I don't think dogs eating squirrels would get you the marks either. But then again I'm not an examiner

Reply 1607

Moon1ight

15

Original post by NielsBohrsDad

Phew. I was worried.

I wrote the stages of phagocytosis and then hoq rhey present their antigens for t.lymphocytes to be selected.

How.much wud that be

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I put that too - im sure you'd get near to full marks if you put detail in

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Reply 1608

Sam_1996

What was the answer to the question
What group of biological molecules is dehydrogenase in?

Reply 1609

Liamnut

13

Original post by niceguy95

Protocrista due to size (0.1 micro meters) and it being a water bear

Protoctusta are usually found in water

Tardigrades (commonly known as waterbears or moss piglets)[2] are small, water-dwelling, segmented animals with eight legs.

http://en.wikipedia.org/wiki/Tardigrade

Reply 1610

jadec123

Original post by Sam_1996

Did you guys get around 0.6366 (or something like that) for the diversity index.

YES

I got 1-0.3.... Something like that anyway :smile:

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Reply 1611

MrMeep2580

Original post by exams567

what about 2 specific reasons on the importance of conserving the red squirrels in northcumbria or something like that?

good for ecotourism

good genetic resource.

Reply 1612

jadec123

Completely messed up the two last pages -.-
Did anyone else finish the paper really early? I had half an hour left, but then obviously went back over it and added to some of my answers!

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Reply 1613

LaughingGas

5

Original post by Sam_1996

What was the answer to the question
What group of biological molecules is dehydrogenase in?

Enzymes I believe

Reply 1614

Munrot07

18

It was a good paper :smile:

A lot came up that I thought would come up, DNA was expected though the wonderful semi conservative DNA experiment that isn't in the book came up :P love it. No hard questions, some questions will have confused candidates on wording and I can see lots of people getting a few 1/2 or 2/3. As usual the biodiversity required some thought but mainly common sense and the long questions were a bit mean, 7 marks for selective breeding, bit harsh :P how did you find it :smile:

Reply 1615

Minz

So, what about the 7 marker on selective breeding to get disease resistant crops and then precautions of selective breeding.

What did people write about precautions and how to reduce implications of selective breeding?
Seed banks, botanical gardens? Or do you think they were looking for something else?

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Reply 1616

Liamnut

13

For the one where you had to draw H bonds, I drew two between A and T and three between C and G. I labeled them H-bonds, but I'm worried because I just put H-bond.

Reply 1617

Sam_1996

What would this definition of biodiversity get?
The variety of living organism within and area.The range of habitats and species

Reply 1618

LaughingGas

5

Original post by Munrot07

It was a good paper :smile:

A lot came up that I thought would come up, DNA was expected though the wonderful semi conservative DNA experiment that isn't in the book came up :P love it. No hard questions, some questions will have confused candidates on wording and I can see lots of people getting a few 1/2 or 2/3. As usual the biodiversity required some thought but mainly common sense and the long questions were a bit mean, 7 marks for selective breeding, bit harsh :P how did you find it :smile:

It was okay, I agree with what you have said, some words were confusing, such as the alternative word (culling) for trapping and killing.

Reply 1619

lauren1brown

6 marks for structure of collagen? Anyone?

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OCR Biology F212 Revision [3rd June 2013] (Now Closed)

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