Qualification > Sciences
AS Biology Paper 2
yuedidi:
hope i can get A in all four subject lol....
i need 4 A's for my medicine ::)
kratos009:
Ok good luck ;). Its still a long time away from getting our results, a long wait... :D.
rose107327:
yay! i put active transport :D
i got so freaked...the lysosome thing was 4 marks!
what did u guys put for why they raised the temp to 85 degrees??
and what did u write about the cell surface membrane's role?! it was 3 marks!
i just said it folds inwards to engulf materials outside of cell into a vesicle.
kratos009:
For the 85 degrees Celsius one they did it to denature the enzyme because the whole point of the experiment was to see when it reached the green colour first. So they needed to kill the enzyme so that it does not keep producing more reducing sugars which would change the colour of the solution of Benedict ;). And for the cell membrane one you just had to say it consists of receptors, which seek the bacteria via anitgen on bacteria's membrane, and then the bacteria binds to the phagocyte. then the cell membrane engulfs the bacteria via endocytosis.
ilmarien:
I almost gave a "facilitated diffusion" answer and a friend of mine actually answered "facilitated diffusion". :D
What are the vacuoles/lysosomes?? ??? I can't remember anything about that.
And about the Nitrogen, I thought that the nitrogen will be used by the plant to make protein and proteins have energy values. LOL (Are the leaves even able to?)
I had no idea so I just made a wild guess.
Anyone got confused for the TMP-1 Protein question? I had no idea what I need to mention in that one.
By the way, will the examiners deduct some points if the answers contain bad grammar? I think my brain wasn't working right during the exam and some of the sentences I wrote sounded awfully strange in my head.
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