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NOTES FOR BIO A2??
i'd suggest you to download the mary jones revision guide, its complete and concise! here's the link ;) www.xtremepapers.com/community/attachments/cambridge_international_biology-pdf.6586/ -
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Biology paper 2
you should not worry! i asked a teacher, they are not supposed to penalise you since there is no mention of whether candidates should write in bullets or continuous prose! we got on cells, biological molecules, enzymes, dna, heart, and infectious diseases! -
Biology paper 2
we did 22! what are the chapters on which you were assessed? -
Tips for Chemistry Practicals (P3)
Hey :) could you please share some examples of how to plan an experiment in p5? -
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When exactly does Crossing-Over in Meiosis occur?
yup prophase I ! since metaphase consists of the bivalents joining randomly at the equator only! -
Chemistry P3 HELP urgent !
how did it go? it was the most easiest paper i have ever done! :X3: -
BIOLOGY PAPER 22
Or 2! i think it will be marked as follows: one mark for labeling inner surface, one for outer surface, one for protein, one for cholesterol and the last for phospholipid! -
BIOLOGY PAPER 22
hey for the first question, (structures seen in electron micrograph) i said RER, cristae of mitochondria and thylakoids of chloroplasts! d'you think its right? -
BIOLOGY PAPER 22
no they were already reaching a plateau.. nevermind, you will probably lose only one mark if you have described the graph correctly! you just got the "explain" part wrong! -
BIOLOGY PAPER 22
it was increasing as not all the inhibitors had bonded to all the enzymes. some active sites were free and still available for subtrate to bind! if it was competitive, the curves with ara atp would be approaching the curve without ara atp, right?! -
BIOLOGY PAPER 22
yeah! i think there was one mark for each label and structure asked! -
BIOLOGY PAPER 22
competitive?! i wrote non competitive because increasing substrate concentration does not increase the reaction rate! -
BIOLOGY PAPER 22
i added glycolipids, glycoproteins, intrinsic proteins, carrier/channel proteins and the other structures asked! i forgot to label inner and outer surface.. its on 5 marks, any idea on how many marks i'll lose??