OCR Gateway Biology B4B5B6 - 10/06/13

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Reply 880

ghost_rebel

Anyone else found this really hard?? :frown:

Reply 881

Elcor

Just to clear this up, what was the x-axis on the graphs question? Cheers.

Reply 882

Knowing

Original post by L'Evil Fish

No... Difference is bigger, so more is absorbed by chip? Hence it bends less.

Not sure what you mean, but I'll just explain:

As we move along the graph from left to right, the solution the potato chip is placed in gets more concentrated with sugar. This means the concentration gradient is less steep, so there is less osmosis as we move from left to right. Less osmosis = less water inside the potato chip. Less water = less turgid. Less turgid = more flexible. More flexible = more degrees it bends.

Therefore, as sugar concentration increases, flexibility increases -> Line goes from low to high.

*overall grade

Original post by Angelfalls

Urgh, I found this exam SO hard. The revision guides were pretty much irrelevant (which sucked because I knew all those pages inside out.)

It's worth 40%, right? So if my other 60% is all A*, and I get, say, a C in this (worst case scenario)...will I still be OK?

Same!!revised so much for this exam nd yeah pretty much knew the revision guide inside and out!!60% is also a* for me!

Reply 885

ellie97

Was the paper out of 85? If so, you would have to get 18 wrong to get an A. Thank you! :smile:

Reply 886

L'Evil Fish

Original post by ellie97

Was the paper out of 85? If so, you would have to get 18 wrong to get an A. Thank you! :smile:

Not really (it's 17 using your workings) but it's not raw = 80%

Reply 887

ChloBrown98

Omg i made up the last question. I said that the population of India was more and more women had blood cholesterol than men meaning that his conclusion was wrong because less men may of been counted or something hahaha omg i felt so confident and now looking at others answers i'm not haha. The 6 mark questions were so easy especially the one on eutrophication! I counted about 50 and maybe more answers that i think i got right (if i counted properly haha), what would this be on the mark scheme?

Reply 888

ellie97

Original post by L'Evil Fish

Not really (it's 17 using your workings) but it's not raw = 80%

Ok, thanks :smile:

. I know it changes according to the country blah blah blah, but was it defintley out of 85? I can't remember! I got A for the potato chip graph, and I said that eutrophication began at 10!

Reply 889

L'Evil Fish

Original post by ellie97

Ok, thanks :smile:

. I know it changes according to the country blah blah blah, but was it defintley out of 85? I can't remember! I got A for the potato chip graph, and I said that eutrophication began at 10!

I put B. And Same! :biggrin:

I'd say 60 is definitely an A*?

Reply 890

Mutleybm1996

Everyone is putting different answers for the potato chip question :L

people have so far said A,B,C

any takers for D? :P

Reply 891

ryanb97

im thinking

60 - A*
47 - A
35 - B
27 -C

Reply 892

Mathangi

Will there be any answers published, I've seen people on here posting all the answers for an exam an hour after it's finished, is that likely to happen for this?

Reply 893

ChloBrown98

Original post by ellie97

Ok, thanks :smile:

. I know it changes according to the country blah blah blah, but was it defintley out of 85? I can't remember! I got A for the potato chip graph, and I said that eutrophication began at 10!

I got C for the potato chip question but I also got that 10km was the eutrophication number for the distance because that was where the fish numbers started to decline :smile:

Woo we have at least 2 marks :tongue:

Reply 894

ellie97

Original post by L'Evil Fish

I put B. And Same! :biggrin:

I'd say 60 is definitely an A*?

Good! Yeah I think so! :biggrin:

Reply 895

Adikurdyla

I put A for the potato :/ and I didn't read the question on the 6 marks properly I answered the question but didn't put the distance of the factory. I thought section D was a bit odd as it didn't fit in. The question about the tree after 5 years I found that quite hard. But the rest was ok

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