Edexcel A2 Biology exams (6BIO4) 25th January 2012 exam discussion

u know i saw this animation for it that has maken it soo much easier for me...wait lemme find it for u

http://learn.genetics.utah.edu/content/labs/gel/

here u go...theyll show an animation first and then ask u to carry out the experiment...helped me alot

Haha, that was good
thanks for the link

it's ok. If I've been taught the stuff off the spec, i generally get it. Hence why I've not a bloody clue about PS1 and PS2...

Edit: God bless google. I think I've got it. PS2 (700nm) is the source of energy that excites the electrons, which then go into the electron transport chain and PS1(<680nm) is for the photophosphorylation stuff?

maths markschemes are even worse. They literally give the bare minimum, so most of the time you're like WTF??

no problem..i prefer watching animations rather than learning every single thing ..also i found some revision notes online..i dont even remember if i got them from this thread or google .. OH MY MEMORY..anyways do tell me if anyone wants them.....cz its a bigg RAR file .

no problem..i prefer watching animations rather than learning every single thing ..also i found some revision notes online..i dont even remember if i got them from this thread or google .. OH MY MEMORY..anyways do tell me if anyone wants them.....cz its a bigg RAR file .

i wantt ittt naaaooww !! pleez !

u know i saw this animation for it that has maken it soo much easier for me...wait lemme find it for u

http://learn.genetics.utah.edu/content/labs/gel/

here u go...theyll show an animation first and then ask u to carry out the experiment...helped me alot

Don't worry yourself. It's alright

EDIT: well now that moizeedexcel wants it,

well thanks ! thats really nice stuff ! buh i want for brine shrimps experiment !! tell me if u hve okay !

well thanks ! thats really nice stuff ! buh i want for brine shrimps experiment !! tell me if u hve okay !

c if this helps u or do tell me

DIS IS DE BEEESSSTTT !!!! thanks soooo much !!!!!!! ive been frekaing out so much bczz of this thing thankss o much again ! GOD bless you !!

well if u have the green ann fullick book for A2 a very clear diagram is given for it

well PS2 gains an electron from the photolysis of water which then excites it and is carried along the ETC to produce ATP..... then the electron acceptor NADP picks up the electron from the PS2 ETC and also simultaneously accepts the h+ from the photolysis of water to from NADPH and then shifts into the light dependent reactions.....this is called non-cyclic photophosphorylation.... ...i think this is it...but im not sure still have to revise this stufff

I've the orange book, and the purple revision guide. I've seen the diagram for it, but i cant make any sense of it. Do we actually need to know the diff. between PS1 and 2 according to the spec?

ahan well according to the revision guide the specification points needed for the photosynthesis are classified into PS1 AND PS2 so i cant really tell but since we have it in revision guide i think its imp .... but i can ask my sir and let u know by tommorow

so why the heck are biofeuls not 100% carbon neutrall !!! AAAAAAA !! they gave this question in a exam for like 7 marks !!!! thnk God i wasnt there !!!

dude, you need to calm down a little, seriously

biofuels need to be grown by removing old crops and creating new land for biofuels to grow. If you move old crop, more co2 not absorbed. Also, machinery is needed to provide transport, and fossile fuels provide the fuel so the process of making biofuels is not 100% carbon neutral

think i'm right anyone like to add/delete/change/reword :spank: me

ahan well according to the revision guide the specification points needed for the photosynthesis are classified into PS1 AND PS2 so i cant really tell but since we have it in revision guide i think its imp .... but i can ask my sir and let u know by tommorow