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AQA Biol4 15th June 2012

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Reply 580

n?la

Original post by H2SO4

Is 42,
Have that thing is 51%
So,

51 is p^2 +2pq

So, q^2 =0.49
q=0.7

p+q=1
p=0.3
2pq=2*0.3*0.7=0.42

Where do the the 0.7 and 0.3 come from? :/

Reply 581

Charter

Original post by failingatm

I said they were genuinely interested in results rather than having vested interests, and that they'd publish their results whereas private companies would keep them to themselves/hidden.

Yeah! I said it was more for environmental research than economic gains.. Kinda the same thing? :s-smilie:

Reply 582

Xenia7

Original post by royraymondo

42% anyone for the Hardy Weinberg?

Yep

This was posted from The Student Room's Android App on my GT-I9100

Reply 583

swiftylol

Original post by James A

Wat did you lot put for the volume of co2 produced for the respiration of seeds question

I put 4 =/

Reply 584

darkred

Original post by James A

Wat did you lot put for the volume of co2 produced for the respiration of seeds question

Guessed this, and put 5. I assumed that the KOH would absorb all of the CO2 released. :headfire:

Reply 585

darkred

Original post by Charter

Yeah! I said it was more for environmental research than economic gains.. Kinda the same thing? :s-smilie:

Yeah should be fine. :bigsmile:

Reply 586

Akbar2k7

Original post by jacky1

Yeah 41. Something but I reckon they'll allow range...
****kkkk though will need to get 106 ums in module 5 if I want my A

I got 41 but I know what I did was wrong I thought p^2=0.51 which is wrong i flopped that question

Reply 587

Akbar2k7

Original post by swiftylol

I put 4 =/

same

Reply 588

Roxas

Yikes, I'm glad there was so much environmental stuff because I lost so many marks on the mamoter question, I really didn't like it!

For biofuels stuff I put

Petroleum is the common place fuel currently so it's the logical comparison of the standard to beat

We know the carbon dioxide levels released during the use of petroleum so it's an easy comparison?

And then

Environmental scientists would work it out for the benefit of the environment rather than their own company.

And that the government standardises it so no company is favoured over the other..

Kind of the same point twice.

Reply 589

NightBear

Well, that petroleum question was hard.

What did everyone put for the question where it asked about why the cellulose had to be pre-treated?

Reply 590

Charter

Generally I didn't think it was overly bad! There was some pretty intense application, but nothing hugely challenging? Some of it was common sense and a lot of it seemed like biochemistry :s-smilie:

The last 3five-markers were pretty tame?

Reply 591

EffKayy

Original post by swiftylol

Original post by failingatm

Original post by Charter

six..

LOOOL.

This seems like a much harder exam than Jan12!
Hope you guys did well.

Reply 592

Akbar2k7

I am not sure about this paper but It doesnt seem like I did that well =/ silly mistakes defo cost me 3 marks. I dont want to imagine where else I flopped.

Reply 593

Charter

Original post by NightBear

Well, that petroleum question was hard.

What did everyone put for the question where it asked about why the cellulose had to be pre-treated?

I made up something along the lines of it released glucose, used in glycolysis, anaerobic conditions and stuff? Something like so the pyruvate can accept a hydrogen from NADH and lose a CO2... I basically just said glucose produced and then described glycolysis :L

Reply 594

H2SO4

Original post by Charter

Ah, didn't read the question thoroughly :/ do you think marks will be gained for an error of 49.98? So for the equations p + q = 1 etc?

Sorry to tell you, unlikely, aqa is harsh on this kind of maths

Reply 595

NightBear

Original post by Charter

Generally I didn't think it was overly bad! There was some pretty intense application, but nothing hugely challenging? Some of it was common sense and a lot of it seemed like biochemistry :s-smilie:

The last 3five-markers were pretty tame?

Didn't like the agricultural crop question :/

Reply 596

Powerpuff2468HR

For the range question of depths question I subtracted the two values and got 1.2m rather than putting 8.4-7.6 or whatever it was...

Reply 597

Roxas

Original post by NightBear

Well, that petroleum question was hard.

What did everyone put for the question where it asked about why the cellulose had to be pre-treated?

I said because cellulose is a complex structure there wouldn't be enough ATP in anaerobic conditions to break it down so glycolysis can occur.. But I'm not sure of that's right

Reply 598

darkred

What are people's predictions for grade boundaries?

Reply 599

Charter

Original post by H2SO4

Sorry to tell you, unlikely, aqa is harsh on this kind of maths

It was three marks though wasn't it? You'd think they'd realise that candidates would do that, I know about 10% of people probably did - not even 1 mark out of three? :O they would for chemistry!