AQA BIOL2 ~ 21 May 2012 ~ AS Biology

RS is apparently the easiest AS apart from media studies, general studies etc.?
Is it really difficult?

hi guys.

So over the past 2 weeks or so, i've compiled a list of mark schemes for many of those 6 marker questions at the end, and many commonly-asked questions. I saw one online for unit 1 which helped a lot with questions, especially for me since i tend to ramble a lot — but there wasn't one for unit 2, so i decided to make one.

As the syllabus is huge, it doesn't cover everything (for example, there aren't too many answers relating to mitosis aren't there, because a lot of the questions are ao2-based with diagrams/tables, so it'd be a tad hard to put mark schemes for that - but just make sure you know the steps and understand how it works, and then you'll be fine). But there definitely is a lot of stuff in there. Not everything is compiled in categories though (i.e you may find there'll be a mark scheme on oxygen affinity, then the next one will be something completely different, and a few mark schemes later it's back to oxygen affinity), so apologies for that.

Obviously, i suggest you revise the syllabus first so you actually understand the course. Compared to your books/notes, the mark schemes won't be of much use in ao2 questions.

For those who download it, i hope you find it useful :-)

oh my word thank you so much!!!

This is incredible, thank you so much!

Cheeky to ask but the Unit One version you referred to, do you have a link to that too?

No problem.

And yeah - http://www.thestudentroom.co.uk/showthread.php?t=1942106&page=22&page=22#432

Can anyone help me answer this question:
Name two factors which affect the rate of facilitated diffusion of a substance through a membrane...? (3 marks)
I can't find anything in the text book..

No problem.

And yeah - http://www.thestudentroom.co.uk/showthread.php?t=1942106&page=22&page=22#432

Surface area, diffusion pathway distance, concentration gradient?

Can anyone help me answer this question:
Name two factors which affect the rate of facilitated diffusion of a substance through a membrane...? (3 marks)
I can't find anything in the text book..

Surface area, diffusion pathway distance, concentration gradient?

Edit: Number of carrier/channel proteins

Has anyone got the AQA textbook exam style question answers? For all the topics.

If so please send me the link.

Hello, Tulia and MockingBird - i remember you guys from January! Ha

I wouldn't have said surface area or diffusion pathway distance.

Hello, Tulia and MockingBird - i remember you guys from January! Ha

I don't know why it is 3 marks if you're only having to give two factors, but I would go with the following:




If I was to give a third point, it would probably be number of channel proteins, as it can act as a limiting factor.

More surface area more room for proteins? Shrug.
To be fair I misread the question at first hence the edit hahah.

No!

I'll let you off though!

Oh, and this request for notes on variation. Can you please elaborate? Do you just want notes on genetic and environmental variation? I'm only asking so I can try and produce something decent for you rather than using my time to not help either of us.