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Reply 1540
Original post by Sum786
isn't 120 the maximum UMS for BIOL2?


140


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Reply 1541
Hi again,
Does anyone know if we have to know the process of conjugation in horizontal gene transmission in bacteria?
Original post by Sum786
isn't 120 the maximum UMS for BIOL2?


100 for BIOL1
140 for BIOL2
60 for the ISA

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Reply 1544
So I think I get meiosis now.
It is Mitosis except:
in Prophase you get crossing over
in Anaphase the centromeres don't separate so the whole chromosome is pulled to the poles of the cell
then telophase as in mitosis except you have chromosomes instead of chromatids
then cytokinesis, and mitosis as normal on the 2 cells.

Is this correct?
Original post by looloo4
Hi again,
Does anyone know if we have to know the process of conjugation in horizontal gene transmission in bacteria?

Yes!
Original post by Sum786
Do we need to know this for BIOL2? i haven't come across it ;/


Its on P166 in the Nelson thornes book. :smile:
Original post by Swords N Thorns
Which one is this?


Its on P166 in the Nelson thornes book. :smile:
Reply 1548


how many marks would you need to get in the paper to get 120 UMS
Original post by Nav_Mallhi
Its on P166 in the Nelson thornes book. :smile:


Dyammmmmmm!!!!!!
Original post by Sum786
how many marks would you need to get in the paper to get 120 UMS


60-65 marks :smile:


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Reply 1551
I am confused.

If a daughter cell contains 23 chromatids when this fuses with another gamete surely you end up with 23 chromosomes.

23 chromosomes is not diploid.

What? Please
(edited 10 years ago)
Original post by Sum786
how many marks would you need to get in the paper to get 120 UMS


It varies depending on the paper but in January 2013 it was 63/85 for 120 ums
I'm thick so can somebody remind me how to calculate the percentage increase and decrease? Is it something like difference between original and new divided by the original x100? I think I'm making that up hahah
Reply 1554
Original post by lauraaaaa
I'm thick so can somebody remind me how to calculate the percentage increase and decrease? Is it something like difference between original and new divided by the original x100? I think I'm making that up hahah


(new-old)/old then x100
Original post by lauraaaaa
I'm thick so can somebody remind me how to calculate the percentage increase and decrease? Is it something like difference between original and new divided by the original x100? I think I'm making that up hahah


Increase:
Finishing value - starting value / starting value * 100

Decrease:
Starting value - finishing value / starting value * 100

Feel free to correct me?
Original post by sikhtank27
Dyammmmmmm!!!!!!


:doh::facepalm:

You again? :tongue:
Hi guys,
Can anyone tell me what is a potometer?!... there was question about this in a past paper cant remember which year, but yh didnt have a clue what it was!!
Reply 1558
Original post by zbert
So I think I get meiosis now.
It is Mitosis except:
in Prophase you get crossing over
in Anaphase the centromeres don't separate so the whole chromosome is pulled to the poles of the cell
then telophase as in mitosis except you have chromosomes instead of chromatids
then cytokinesis, and mitosis as normal on the 2 cells.

Is this correct?


I'M DESPERATE !!! :confused:
is there only 2 experiments that we need to know about
1- using the potometer to measure rate of water uptake
2- counting the number of stomata by using an optical microscope

Is there any more?

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