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Search results
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Bio 42 2015!!!
You would have to show two crosses, you might get marks for showing just one though -
Bio P4: How was it?
Explain the advantage of treating diabetics with human insulin produced by genetic engineering. I liked the paper quite a lot, hoping for an A in sha Allah. -
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WTF CHEMISTRY PAPER 42 IS SO HARD
I got stuck in that last part, the structure with the dibromo. Messed it up. one mark though -
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WTF CHEMISTRY PAPER 42 IS SO HARD
That was an insanely weird paper, organic was damn tough, and that NMR question. Plus so much AS. I really hope the threshold doesn't rise more than 61... -
Biology 9700 Paper 4 Past Paper Notes
Dude, I just got these printed out. They are reliable right? -
Biology paper 52
The question was whether the size of stained area was proportional to concentration of amylase. You couldn't calculate the exact concentration, but you had to find the relative trend when you increased/decreased the concentration, and to calculate the size of area you would need the diameter and... -
Biology paper 52
Waaay too long to explain, but basically had to compare sizes of stained areas that students got, and compare all results with the control of 0.5 g per mol of amylase. Theres so much more but too lazy to type :P -
Biology paper 52
You could draw a graph as well for accuracy and illustrating the results of the investigation, but the principle factor was the size of the area that got stained due to concentration of amylase in the extract you placed in the wells. -
Biology paper 52
Threshold about 24-25, highest in recent years for sure, I'm guessing. It was very basic, nothing tricky at all. Its very clearly the T-test, the reason being that the data was continuous and even a normal distribution curve could be obtained. Plus, they even gave upper and lower limits, but... -
Stuff with glycosidic bonds, amylase concentration, are of inhibition on agar plate of bacteria
Stuff with glycosidic bonds, amylase concentration, are of inhibition on agar plate of bacteria- Jassim
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I don't know, I did the paper at 9-10:15 PM, Pakistan time, 8th of May...
I don't know, I did the paper at 9-10:15 PM, Pakistan time, 8th of May...- Jassim
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Biology P52? How'd the paper go? {No answer discussion}
How was you paper? Do you think the threshold will be high? -
Biology P5 - Tips on Electrophoresis and Chromatography anyone?
Title says it all. -
Possible to improve grade in A2 after AS?
I'm so sorry. Its been a long time, and I've forgotten. I don't want to give you the wrong advice, but if I remember there was a post somewhere on xtremepapers with excellent tips. Search for that? -
Chemistry and Biology P4 guesses?
Any idea what topics are most probable to come in Bio and chem P4 this year? For those done with the pastpapers and theory completely, and who have nothing left do... -
OCT/NOV 2014 CIE |Question Papers ||Marking Schemes||Grade Thresholds| |Examiner Reports|.
What about grade thresholds for Maths, Chemistry and Biology? -
Sharing my CIE A-level Chemistry notes [AS chapters completed]
W A2 chemistry has more chapters...like NMR, biochem, mass spectrometry, chromatography, partition coefficients...but good notes (y) -
Sharing my CIE A-level Chemistry notes [AS chapters completed]
Does anyone know where to get notes for Ionic Equilibria??