Edexcel WBI02 ON 02/06/2014 (Biology Unit 2) IAL THREAD! NOT GCE

http://www.thestudentroom.co.uk/showthread.php?t=2461196
here you will find notes by The Assassin which are really awesome!
these aren't bad either-
http://www.scribd.com/doc/54621822/Edexcel-Biology-A2-Revision-Notes

lmao he meant topic 4 of unit 2 bio .. not unit 4 i think

Does any one have good revision notes for topic 4??

Does any one have good revision notes for topic 4??

Hmmm that's a good question actually.

Cellulose molecule consists of B glucose monosaccharides joined together by 1,4 glycosidic bonds and each one is alternately inverted, cellulose microfibrils consist of individual cellulose molecules,they are cellulose chains arranged in a bundle which are laid down on the primary and secondary wall . Idk what else you could say ?

Can someone please explain ti me why the answer to part A is 5 and not 4? Clearly there must be an error in the rev guide answer
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I think the question is wrong as according to the answer it seems like ..the question should ask " the number of species found in ALL the 3 m2 sampled"

if so then the answer is right. as it is 5 species .

exactly! i thot that either the q is wrong or the answer! thanks mate

http://www.thestudentroom.co.uk/showthread.php?t=2280238&page=107&highlight=notes
here you will find notes for uynit 2 by The Assassin which are really good!you have to just find in which page he uploaded the notes.
and some from here-
http://www.scribd.com/doc/54621588/Edexcel-Biology-AS-Revision-Notes
sorry don't have any notes only on topic 4.

No problem ..

So u ready.. all done i hope ?

is circular DNA and plasmid the same thing?

Yep its the same thing. In fact plasmid is the circular DNA.

thats a good answer but to just add on it u should also talk about the several weak hydrogen bonds forming between the layers in the cellulose microfibril which strengthens the cell wall..

Can somebody explain to me the cortical reaction ??