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AQA BIOL2 Biology Unit 2 Exam - 26th May 2011

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just shoot me now.

Original post by ImaBarbieGirl

just shoot me now.

lol thats what she said

Reply 522

Kandy_Kain_94

I have a feeling that Tissue Fluid and Lymph will come up

Reply 523

oHellno

Original post by Master.K

Variation? What on variation for eg could come up? :s-smilie:

Maybe something about meiosis. Though it isn't possible to have 6 marks just on that :dontknow:

I actually hate unit 2 so much, the past papers are SO long, they go on forever :bawling:

Reply 524

aleema1992

Antibodies prevent peptide linkages in cell walls
but viruses have a differenct cell wall make upp so theese antibodies dont workk

Reply 525

Master.K

Original post by oHellno

Maybe something about meiosis. Though it isn't possible to have 6 marks just on that :dontknow:

I actually hate unit 2 so much, the past papers are SO long, they go on forever :bawling:

So do I......My technique is basically just copy out the mark scheme for every paper and just revise it. :p:

Reply 526

oHellno

Original post by Master.K

So do I......My technique is basically just copy out the mark scheme for every paper and just revise it. :p:

I've done the same thing, have a good few pages of me copying out and organising the mark scheme to revise from. :tongue:

It's much easier to do for Unit 1 though, the questions aren't as similar/repetitive for this exam.

Reply 527

LifeIsGood

Original post by kingsmod1

lol thats what she said

The Office fan eh? :tongue:

I hope something on Water Transport comes up for the 6 markers, but who knows if they change the whole style of paper like they did for unit 1? If anyone has the Unit 1 paper, please PM me, thanks. I'm expecting the usual topics to pop up.

Reply 528

jbop

really dont want mitosis/meiosis. or tissue fluid. or transport. fml

Reply 529

LifeIsGood

Original post by Master.K

So do I......My technique is basically just copy out the mark scheme for every paper and just revise it. :p:

That's not a bad idea but the same questions won't come up for definite :frown:

I have however seen a few questions that come up in every paper. With AQA, you need tonnes of exam practice to be guranteed a solid grade

Reply 530

LifeIsGood

The one thing I DESPISE is the last HSW question, it's stuff you'd never even think of! :frown:

Reply 531

oHellno

Original post by jbop

really dont want mitosis/meiosis. or tissue fluid. or transport. fml

I really want an extended question on mitosis/meiosis. It's the only good topic in this unit.

Reply 532

Kandy_Kain_94

Original post by jbop

really dont want mitosis/meiosis. or tissue fluid. or transport. fml

This and Classification :s-smilie:

Sup guys.

Original post by LifeIsGood

I've never seen a question along those lines unless you're talking about tissue fluid?

No, our teacher gave us a sheet with some examples of possible questions and that was one of them...

Original post by ChessMister

veins are flattened due to muscle contractions, giving pressure in the veins
veins have valves to prevent backflow

Don't know where five marks come from....

Original post by ryan02

I'm thinking:
-valves
-muscle tissue
-which can contract
not sure about the other 2 marks :/ maybe elastic tissue, recoiling and stuff. or...gravity? :P

Original post by Dunc

The venous return is part of the As-level PE syllabus, not so much in As-level biology;
The mechanisms are:
Skeletal muscle pump: Working muscles push on near by veins, when the contract, forcing blood back to heart.
Respiratory Pump: a change in pressure causes the thoratic cavity to expand, pushing on nearby veins, (similar to the muscle pump).
Valves: prevent back flow.
Smooth muscles in veins: constrict, squeezing blood to heart.

All this happens in the veins.
Hope i could help :biggrin:

Thanks guys :smile:

This is what my teacher said when we went through it in class yesterday:

"Skeletal muscles contract which squeezes the veins... Valves in the viens prevent backflow....Pressure from ventricle contraction (when the heart beats)....and then... heart relaxing"

Not really in full sentences and I don't get the last bit about the "heart relaxing"?... but those were just the key points she wrote on the board...

Reply 535

Master.K

Original post by LifeIsGood

That's not a bad idea but the same questions won't come up for definite :frown:

I have however seen a few questions that come up in every paper. With AQA, you need tonnes of exam practice to be guranteed a solid grade

Yeah but atleast you'd know how to answer 'similar' sorts of questions.... :smile:

Reply 536

ChessMister

I have given up on revision in the last two days and have since watched Thelma & Louise, Tormented and She's Out of My League. I also started reading Dickens yesterday, despite not having glanced at a book in years.
Now is the time to let fate run its course; any further revision would be procrastination.

Reply 537

lolo-x

Please can anyone help me with question 4a on this paper http://store.aqa.org.uk/qual/gce/pdf/AQA-BIOL2-W-QP-JUN09.PDF

the mark scheme is here http://store.aqa.org.uk/qual/gce/pdf/AQA-BIOL2-W-MS-JUN09.PDF but I don't understand the answer so if anyone could explain I'd be veeeeery grateful!

Reply 538

salsabil

hey guys,
hope reviision is going well. just to sayy..
fish and exchange myt come up [its what my teacher sed].. cuz it hasnt comeup in two years :eek:

soooo... if u skipped fish and didnt revise it....think again! :wink:

Reply 539

LifeIsGood

Original post by lolo-x

Ok, Mitosis produces identical cells with the SAME number of CHROMOSOMES. That's the key priniciple you need to be able to apply to this question.

At prophase you've got 26 chromosomes so at telophase you have 26. Why? ^Apply that principle. [If it was meiosis, it'd be halved.]

However, the DNA mass changes as mitosis divides into TWO cells so the mass of DNA divides by two.

And with the sperm cell, it's just halved as it's haploid