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Author Topic: Edexcel BIOLOGY Doubts!!!!  (Read 133019 times)

Offline Dento

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #75 on: May 24, 2010, 06:09:46 pm »
thats ok mate, im having alot of it + it wouldnt be nice from me if i dont wait, thanks alot, ill wait, but note that my paper is tomorow ;D
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Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #76 on: May 24, 2010, 06:10:49 pm »
dont worry so do i
wen i said patience i meant for a few min
just for me to solve n scan nupload ::)
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Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #77 on: May 24, 2010, 06:19:26 pm »
Quote from: Pharma on May 24, 2010, 06:09:46 pm
thats ok mate, im having alot of it + it wouldnt be nice from me if i dont wait, thanks alot, ill wait, but note that my paper is tomorow ;D

here ya go

tell me if u dont get it
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Offline Dento

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #78 on: May 24, 2010, 06:40:24 pm »
well, thats perfect !!!
thanks pal, to be honest with u, im solving the genetic questions from the examwizard files and i find it totally weird and diffferent from the new syllabus, so i find some difficulties,
thanks aloooot kim
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Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #79 on: May 24, 2010, 06:43:37 pm »
Quote from: Pharma on May 24, 2010, 06:40:24 pm
well, thats perfect !!!
thanks pal, to be honest with u, im solving the genetic questions from the examwizard files and i find it totally weird and diffferent from the new syllabus, so i find some difficulties,
thanks aloooot kim

no prob
best of luvk for the pp tomorrow i hope it is easy and no weird questions are asked
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Offline Blizz_rb93

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #80 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.
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Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #81 on: May 24, 2010, 09:55:52 pm »
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.

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
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Offline Blizz_rb93

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #82 on: May 24, 2010, 10:00:21 pm »
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
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
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Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #83 on: May 24, 2010, 10:04:51 pm »
ok lemme check again
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Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #84 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
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Offline Blizz_rb93

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #85 on: May 24, 2010, 10:22:02 pm »
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
thank you very much =]
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Offline Dento

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #86 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 ?
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Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #87 on: May 25, 2010, 12:34:10 pm »
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 ?

haha ok
62-was the core practical for unit 1 (beetroot experiment)
67 and 72-are both related to unit 1 gene therapy
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After all is said and done, more is said than done.

By the time a man realizes that maybe his father was right, he usually has a son who thinks he’s wrong.

The early bird may get the worm, but the second mouse gets the cheese.

Offline Dento

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #88 on: May 25, 2010, 02:59:11 pm »
then i no longer need them  ;D
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Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #89 on: May 25, 2010, 04:21:19 pm »
Quote from: Pharma on May 25, 2010, 02:59:11 pm
then i no longer need them  ;D

haha nice
so how was the paper?
it was ok for me

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After all is said and done, more is said than done.

By the time a man realizes that maybe his father was right, he usually has a son who thinks he’s wrong.

The early bird may get the worm, but the second mouse gets the cheese.
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