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AQA BIOL2 Biology Unit 2 Exam - 26th May 2011 watch

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1. hey any ideas of what should/could come up in the bio 2 paper?
2. Question 6(b)i in June 2009 paper, the number of different genera is 6 according to the markscheme. Can somebody explain?

http://store.aqa.org.uk/qual/gce/pdf...W-QP-JUN09.PDF

Plz Quote me, Thanks
3. (Original post by Master S P)
Question 6(b)i in June 2009 paper, the number of different genera is 6 according to the markscheme. Can somebody explain?

http://store.aqa.org.uk/qual/gce/pdf...W-QP-JUN09.PDF

Plz Quote me, Thanks
The genera is the first name. So if you look at the first names, there are only six different types.
4. How much does everyone know about cell differentiation? I seem to have hardly any notes on it / in my text book?
5. (Original post by CityTrader)
Does a lower partial pressure i.e the Bohr curve shifts left, mean that the person has a higher affinity of oxygen?
The Bohr shift is just when the dissociation curve moves to the right, due to an increased partial pressure of CO2.
Higher affinity is where there's a larger saturation of haemoglobin with O2 loaded onto it, i.e. in the lungs.
On the far left of the scale is where the Haemoglobin unloads it's O2 in the tissues due to a lower affinity (i.e. less attraction to the O2, as it's needed in respiring tissues for respiration)
If there's a curve to the right of a human one, this means that the other animal's haemoglobin has a higher affinity for O2 because they need to load the O2 onto their haemoglobin more readily, for example a llama up a mountain like in Jan '11.
If it's an active animal the curve shifts to the right as it releases more CO2 and hence it's haemoglobin needs a lower affinity for O2 as it is respiring more and so needs more O2 in order to respire and remain active, such as a hawk.

Hope this helps anyway lol
6. (Original post by liviaaa)
How much does everyone know about cell differentiation? I seem to have hardly any notes on it / in my text book?
just need to know the definition- The process which cells undergo to become specialized at performing a particular function.
7. (Original post by ChessMister)
just need to know the definition- The process which cells undergo to become specialized at performing a particular function.
Thanks!
8. (Original post by ChessMister)
just need to know the definition- The process which cells undergo to become specialized at performing a particular function.
Should you mention certain genes turning off so it becomes specialized?
9. (Original post by ??????????????????)
Should you mention certain genes turning off so it becomes specialized?
Possibly if it's two marks. And are you sure that they turn from on to off, rather than off to on?
10. (Original post by ChessMister)
Possibly if it's two marks. And are you sure that they turn from on to off, rather than off to on?
Stem cells can become any cell as they have all genes on. When they specialise the lose this ability because they turn off the genes. So yeah, quite sure. I think that was in GCSEs lol.
11. Has any one got past papers with mark scheme, of BIOL2 from years 2005 to 2008, I dont seem to find it anywhere on the web.
12. (Original post by therapist_1)
Has any one got past papers with mark scheme, of BIOL2 from years 2005 to 2008, I dont seem to find it anywhere on the web.
The syllabus was different 2005 - 2008, so unless you want to do some Q from the old spec, that's all there is.
13. I have C2 on the same day FML .
14. (Original post by Whatever9999)
I have C2 on the same day FML .

Me too..
15. I have C2 as well and thanks liviaaa.
16. How much do we really need to know about Kingdom Phylum ......Species, as in do we need to know specific members ? Or will it usually be given in the question ? Thanks
17. (Original post by RoadRunner)
How much do we really need to know about Kingdom Phylum ......Species, as in do we need to know specific members ? Or will it usually be given in the question ? Thanks
No, just the order
18. (Original post by RoadRunner)
How much do we really need to know about Kingdom Phylum ......Species, as in do we need to know specific members ? Or will it usually be given in the question ? Thanks
You just have to know the order K-P-C-O-F-G-s , and know that Genus name starts with Capital letter and species starts with small letter. So you don't need to know specific members at all as it is all ways given.

NB: What you have asked is a hierarchical classification of a taxonomy (There is not much to know in there).
19. (Original post by therapist_1)
I have C2 as well and thanks liviaaa.
me too
20. (Original post by SteveCrain)
You sure air sacs are on the syllabus?

Oh myy.... My teacher gave us a booklet about airsacs and hinted that they could ask us something about them!!! He said "they may add something new into the syllabus for this paper" with a grin on his face... hmmmm.

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