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Liam2404
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(Original post by Helpfulstudent)
For your first question 1 mark for concentration, not sure about the age of snake because they were substituting the snake with a piece of filter paper so surely age doesn't matter.

for your second question 1 mark for first point. Don't know about the second as we don't know if a shorter or longer size is more beneficial for survival.
Thanks so much pal, hope you get an A
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Helpfulstudent
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(Original post by Liam2404)
Thanks so much pal, hope you get an A
No problem, thanks hope we both get one.
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Liam2404
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(Original post by Helpfulstudent)
No problem, thanks hope we both get one.
Aha i doubt it, using that unofficial mark scheme and what you just said I've got 69, which should be an A right, but i think unit 1 might drag me down. Will have to wait til results day I suppose You've definitely got an A - your a walking mark scheme
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MrMikeEsq
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(Original post by Helpfulstudent)
The answer really only required there to be 3 chromatids of different sizes.

possible combinations:
Attachment 222849
Well my guesswork payed off this time!


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Helpfulstudent
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(Original post by Liam2404)
Aha i doubt it, using that unofficial mark scheme and what you just said I've got 69, which should be an A right, but i think unit 1 might drag me down. Will have to wait til results day I suppose You've definitely got an A - your a walking mark scheme
haha, I've done so many papers so I know what they sort of want.

I've already got an A in biology for AS. I need a higher A at AS so that I can get my A* at A2 which is why I redid the AS units to get higher As.
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lifeisgood2012
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improving you AS A to a higer A is not going to get you the A*... you need A* average on all A2 units and atleast An A for your overall A level
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Helpfulstudent
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(Original post by lifeisgood2012)
improving you AS A to a higer A is not going to get you the A*... you need A* average on all A2 units and atleast An A for your overall A level
They say its an A at AS and 90%+ in both A2 units.

This is partially true. You need an A at AS at a certain UMS (don't know actual value). Only then can you be eligible to get the A*. I had quite a low A so even though I acheived an A the UMS wasn't enough. Ask your teacher.
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Liam2404
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(Original post by Helpfulstudent)
haha, I've done so many papers so I know what they sort of want.

I've already got an A in biology for AS. I need a higher A at AS so that I can get my A* at A2 which is why I redid the AS units to get higher As.
Well Done! I'd be happy with a B tbh, I think a B is an excellent grade for such a hard subject. Good luck, hope you get it!! You deserve to!
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Lucy_95
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(Original post by amar96)
that doesnt stop growth...the asnwer was inhibiting protein synthesis
but technically if the bacterial cell bursts, it can't grow anymore... :P I think there will be a range of answers for this, but osmotic lysis is directly in the specification
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cc1805
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i found the paper prettty easy
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Linked
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When excess calcium is added to water, effervescence occurs and
A a clear colourless solution is formed.
B a cloudy suspension is formed.
C an orange-red flame is seen.
D a yellow flame is seen.

answers b - why? please can anyone help me
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cc1805
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(Original post by Linked)
When excess calcium is added to water, effervescence occurs and
A a clear colourless solution is formed.
B a cloudy suspension is formed.
C an orange-red flame is seen.
D a yellow flame is seen.

answers b - why? please can anyone help me
well its not c and d because there is no flame,
its added in excess so not all of it will dissolve so no colourless solution

leaves with B?
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Enn21
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Hi, can someone link me the unofficial markscheme please?
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Aspiring Medic 7
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Hey can somebody please tell me what 66 would probably be in terms of UMS?

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tilownii
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(Original post by walkers38)
Guys, I appreciate your criticisms about my mark scheme but hey! those were my answers. was just helping out. i do agree there are few flaws, but you know it better. it gives idea of marks and almost all accurate answers. no bashing please:cry:
Awwwww don't worry I personally thought ur mark scheme was spot on no worries thought it was great man!!! Not trying to be a kiss ass but u know its true
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jojomojo
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(Original post by Wintabix)
Hopefully because I wrote that too!
i said to use paper with no lipids on it
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x-Sophie-x
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Did anyone write about horizontal gene transmission for the questions about why there were very few bacteria?

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Mangodepo11
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(Original post by Aspiring Medic 7)
Hey can somebody please tell me what 66 would probably be in terms of UMS?

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around 95% ums going of january ums convertion. This paper was harder so maye 98-97% ums.
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Linked
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(Original post by cc1805)
well its not c and d because there is no flame,
its added in excess so not all of it will dissolve so no colourless solution

leaves with B?

i mean how would you know there is no flame?
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tilownii
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Would I get any marks for saying that centromeres help chromosomes to line up along equator of cell and they help chromosomes to attach to spindle is this 2 marks please answered meeee!!!!!
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