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Edexcel 6BIO2 ~ 3rd June 2013 ~ AS Biology

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In the notes it says that cord blood is multipotent, but isn't it pluripotent?
Taxonomy and classification has been removed from the spec
Transpiration process and more detail than the basic structure, location and function of only xylem and sclerenchyma have never been on the spec.

Good luck to everyone! I'm hoping the paper's difficult content-wise so the grade boundaries are nice and low and better than the ridiculous 80% January ones...
Original post by JaayBiology
Please can someone give me the steps involved in the totipotency practical? :smile:


single cell taken from a growing area
the cell is placed in a sterile growth medium
the growth medium contains nutrients and growth hormones
plant cell will grow/divide into unspecialised cells
the unspecialised cells will differentiate into specialised cells if condition are at its optimum
cell will grow and differentiate into an entire plant
Reply 1443
any expectations of what will come tommorw plzzzzz any1
Original post by mace0590
heey just joined here :biggrin: what are ur expectations for 2mmorows exam bio unit 2?


Lots of topic 3 questions, not much practical and HSW emphasis.
Which is not a bad thing if that is correct.
Original post by The Monk
Not sure if we really need this but what actually happens in G1, S1 and G2 for interphase.


G1--syntheseis of cellular proteins and organelle
s1-- replication of DNA
G2-- synthesis of spindle fibres

hope this helps
Original post by Kurraiyo
In the notes it says that cord blood is multipotent, but isn't it pluripotent?


multipotent - cells differentiate, but can form a number of other tissues. it is not pluripotent because it cannot give rise to many cell types

hope this helps
Original post by mace0590
any expectations of what will come tommorw plzzzzz any1


I reckon:

Not much HSW or practicals
Lots on mitosis phases
Root tip squash practical description or maybe tensile strength or tissue culture
RER/Golgi transport
Zoos
Stem cells
Mammalian fertilisation/adaptations or maybe plant fertilisation
Cell structure
Maybe a small question on cellulose structure


Thanks alot mate! Do you have the ones for Physics and Chemistry Unit 2? Would really appreciate that. Thanks again.
Reply 1449
topic 3 as in what the whole biodiversty stuff? i feel 2013 was tooo much science based n exp this tme all about pure content what u guys think?
Original post by billyfisher100
Lots of topic 3 questions, not much practical and HSW emphasis.
Which is not a bad thing if that is correct.


its allright if they give clear questions they want to ask, not ;long winded question where you have to play detective to find out what they want
Reply 1451
yayy i hope tooo bcuz i hate HSW :biggrin: i think am using this wrong btw :s
Original post by Vivaviolin77
G1--syntheseis of cellular proteins and organelle
s1-- replication of DNA
G2-- synthesis of spindle fibres

hope this helps

cheers
Reply 1453
Original post by Kurraiyo
In the notes it says that cord blood is multipotent, but isn't it pluripotent?


multipotent cells can differentiate into any cell of a particular cell type e.g. cord blood or adult stem cells

pluripotent cells can differentiate into any cell types
Reply 1454
am sure they will bring the fertilization :biggrin:
Original post by billyfisher100
I reckon:

Not much HSW or practicals
Lots on mitosis phases
Root tip squash practical description or maybe tensile strength or tissue culture
RER/Golgi transport
Zoos
Stem cells
Mammalian fertilisation/adaptations or maybe plant fertilisation
Cell structure
Maybe a small question on cellulose structure


what do you mean by cell structure
????
Why are plant extracts more effective at lower concentration when they create larger zones of inhibition than others?
Original post by Shadow-Man_4
Thanks alot mate! Do you have the ones for Physics and Chemistry Unit 2? Would really appreciate that. Thanks again.


you're welcome :smile: no, I don't have them. sorry.
Reply 1458
Original post by Vivaviolin77
what do you mean by cell structure
????

meaning the structure of plant n animal etc i guess
i feeel there might be a question on drawing two glucose moelcules togther

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