# BIOL4 Biology Unit 4 Exam - 13th June 2011 watch

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1. (Original post by jonnyboy1993)
It's an attached file in the first post on this thread
Thank you so much! I have searched the whole thread but couldn't find it. Thanks !
2. (Original post by SK-mar)
i reckonnnnn it will be squirrels.... its always some kind of small furry wild animal... although i like squirrels so i hope its not... haha
I dunno, last time it was a wood louse :P Not particularly furry ^ ^
3. (Original post by SK-mar)
it tells you in the question that the maximum age is something like 95.... so you find the percentage of the age at the specific amount... i think its 85% right??? but then you take 85% of 95 or whatever the maximum age is and it gets you the answer.
AM struggling on 2b
4. How is the chloroplast adapted to its function? lets do Q and A...
5. Wasnt the animals in the Jan11 paper cattle? Theyre not so small and furry.
6. What do we think the long answers are going to be at the end? Eutrophication and what else?
7. (Original post by Rickesh)
What do we think the long answers are going to be at the end? Eutrophication and what else?
Respiration, maybe?
I've seen both parts of photosynthesis on the long answers in past papers but not any respiration yet (I think)
8. (Original post by InfinitelyVixey)
Respiration, maybe?
I've seen both parts of photosynthesis on the long answers in past papers but not any respiration yet (I think)
Have you got the mark scheme for the photosynthesis one? That might come up?
9. (Original post by arvin_infinity)
AM struggling on 2b
This is how i did it:

The max rate will be steepest point on graph so get any 2 points on the steepest bit and just read off the graph

25-20= 5

400-200=200

200/5 = 40.. do u get it? Hope it helps..
10. (Original post by Rickesh)
How is the chloroplast adapted to its function? lets do Q and A...
intergranal lamelae increases SA for light dependant reaction, Thylakoids are stacked up in granum for maximum rate of light dependant photosynthesis.
11. (Original post by Stratos)
intergranal lamelae increases SA for light dependant reaction, Thylakoids are stacked up in granum for maximum rate of light dependant photosynthesis.
12. (Original post by *Rainbow*)
This is how i did it:

The max rate will be steepest point on graph so get any 2 points on the steepest bit and just read off the graph

25-20= 5

400-200=200

200/5 = 40.. do u get it? Hope it helps..
I get it now..but we meant to draw a line that crosses x-axis and then read off the graph

(thats what we do in physics and chemistry)
13. (Original post by arvin_infinity)
I get it now..but we meant to draw a line that crosses x-axis and then read off the graph

(thats what we do in physics and chemistry)
14. (Original post by arvin_infinity)
I get it now..but we meant to draw a line that crosses x-axis and then read off the graph

(thats what we do in physics and chemistry)
Doing that would help yeah
15. (Original post by Rickesh)
How is the chloroplast adapted to its function? lets do Q and A...
1. Contains both Dna and ribosome so it can manufacture protein needed quickly and easily

2. Protein structure hold chloroplast in a precise manner that allow max aborption of light

..
16. (Original post by arvin_infinity)
1. Contains both Dna and ribosome so it can manufacture protein needed quickly and easily

2. Protein structure hold chloroplast in a precise manner that allow max aborption of light

..
17. (Original post by Rickesh)
Yeh..but u would get a different answer!! (wrong answer to be precise:P)
18. Energy is transferred through an ecosystem. Describe how and explain why the efficiency of energy transfer is different at different stages in the transfer. (6 marks)
19. (Original post by arvin_infinity)
Yeh..but u would get a different answer!! (wrong answer to be precise:P)
when working out the gradient? Why?
20. (Original post by Rickesh)
Have you got the mark scheme for the photosynthesis one? That might come up?
I haven't got them to hand but I know they're on the AQA website

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