Qualification > Sciences
Edexcel BIOLOGY Doubts!!!!
Blizz_rb93:
im having some problem with Jan 2009 question 4) b) and c)
replies appreciated asap
thank you.
Kim:
--- Quote from: Psyclax on May 24, 2010, 09:47:11 pm ---im having some problem with Jan 2009 question 4) b) and c)
replies appreciated asap
thank you.
--- End quote ---
well
4b-glycogen is only made of 2 monomers of glucose so it cannot have any form because only wen these 2 combine will it give glucose
but protien on the other hand are made of amino acids
there are 20 amino acids in our body which can each combine wid each other to give a different form of protien
4c-rna van be trna or mrna .as mrna is used for protien synthesis so all the rna will differ from each other as each will specify for a particular protein
hope u understand if u dont tell me
Blizz_rb93:
--- Quote from: kim on May 24, 2010, 09:55:52 pm ---well
4b-glycogen is only made of 2 monomers of glucose so it cannot have any form because only wen these 2 combine will it give glucose
but protien on the other hand are made of amino acids
there are 20 amino acids in our body which can each combine wid each other to give a different form of protien
4c-rna van be trna or mrna .as mrna is used for protien synthesis so all the rna will differ from each other as each will specify for a particular protein
hope u understand if u dont tell me
--- End quote ---
lol i meant january 2009 unit 1 question paper lol
the question's about the permeability of the beetroot membrane and effect of alcohol concentration
Kim:
ok lemme check again
Kim:
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
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