Qualification > Sciences
Edexcel BIOLOGY Doubts!!!!
Blizz_rb93:
--- Quote from: kim on May 24, 2010, 10:17:54 pm ---ok here goes
4bi-control the temperature
and volume of beetroots used should be same(to make sure they have same conc of pigment)
ii-there is a chance that wen u cut the cylinders of beetroot sum of the cells will get damaged causin the pgments to leak out
iii-the student should have washed the cylinders wid distill water to remove any damaged cell or extra pigment
ci-it increases
ii-well for this i am not sure but u cud say that ethanol causes the disruption of the cell wall so the pigments can leak out.also as it is for 2 marks u can say that ethanol is a polar solvent and usually polar solutes dissolve in polar solvents so lipids might have dissolved in ethanol
--- End quote ---
thank you very much =]
Dento:
i just wanted to ask,
the notes on posts 62,67,72 are corresponding to which unit ?
Kim:
--- Quote from: Pharma on May 25, 2010, 12:30:10 pm ---i just wanted to ask,
the notes on posts 62,67,72 are corresponding to which unit ?
--- End quote ---
haha ok
62-was the core practical for unit 1 (beetroot experiment)
67 and 72-are both related to unit 1 gene therapy
Dento:
then i no longer need them ;D
Kim:
--- Quote from: Pharma on May 25, 2010, 02:59:11 pm ---then i no longer need them ;D
--- End quote ---
haha nice
so how was the paper?
it was ok for me
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