OCR Biology F214 Communication, Homeostasis and Energy Wed 25 Jan 2012

OP

Original post by Alana6277

Does anyone know why the no. of ATP produced from NADH and FADH2 differ in almost every textbook? :confused:

My teacher said one reducedNAD makes 3, the CGP rg states 2.5 and the OCR textbook says 2.6. and some others state diff no. usually between 2.4-3.
Why these numbers?

Original post by ALZ-93

I know, really annoying. I just use the one in the official OCR textbook.

In an efficient cell each Coenzyme NAD should provides enough protons to phosphorylate three molecule of ADP to produce three molecules of ATP. However some ATP is required to activate glucose in glycolysis and also ATP is required to actively transport pyruvate from the cytoplasm into the matrix of the mitochondria so that’s why you get all these different figures.

Reply 22

OP

Original post by Bi0logical

Does anyone know where I can get past papers for each topics? like specifically for Respiration, Photosynthesis, etc..

:smile:

old spec 2804 i think- it contains respiration, photosynthesis and excretion. you will have to search the paper for the questions to do.

Reply 23

Alana6277

2

Original post by undertaker1

In an efficient cell each Coenzyme NAD should provides enough protons to phosphorylate three molecule of ADP to produce three molecules of ATP. However some ATP is required to activate glucose in glycolysis and also ATP is required to actively transport pyruvate from the cytoplasm into the matrix of the mitochondria so that’s why you get all these different figures.

Thanks for making that clearer :smile:

Reply 24

glitterphobia

16

Original post by undertaker1

Ok guys, I failed miserably in june. I guess it was a lack of preparation. However I am now on my third year and want to achieve an A*. (i assumed ocr love plants and loads of questions on photosynthesis will come up!!!) They definitely proved me wrong.
So for January I thought I’d start my revision early.
How’s everyone else finding it so far?

If anyone has any other additional useful resources for F214 please feel free to share. So far i have found http://www.youtube.com/user/OCRBiologyAS#g/c/64BC58EC5F01F01A

Glad you like my YouTube channel! :smile:

I'm making a new one too, along with my website with extra notes on it:
http://www.youtube.com/user/OCRBiologyA2
http://learn123.co.nr

Reply 25

Princess Kawaii

15

Original post by undertaker1

i'll probz have it by monday

Okiie that's great... thanks :smile:

Reply 26

gannalise

does anybody have the January/June 2011 F214 mark schemes!?

Reply 27

nju

Original post by Princess Kawaii

This. Same question. :smile:

anyone have it ??

(edited 12 years ago)

Reply 28

nju

Original post by gannalise

does anybody have the January/June 2011 F214 mark schemes!?

Do you have the papers for jan 2011 and june2011

Reply 29

OP

F214-01 insert Jun11.pdf960.9KB

I have attached the OCR F214 June 2011 Paper+mark scheme :smile:

F214-01Jun11.pdf249.9KB

F214_MS_June11.pdf288.2KB

Reply 30

nju

Original post by undertaker1

I have attached the OCR F214 June 2011 Paper+mark scheme :smile:

Thankyou
do you have the paper and mark scheme for jan 2011

Reply 31

OP

Original post by nju

Thankyou
do you have the paper and mark scheme for jan 2011

yeh- aint in on the ocr website though?

Reply 32

The Illuminati

I just look at the paper and I would have been guaranteed failure if I'd sat it. It's so difficult, it's beyond regurgitating facts (which I am an expert at). So much thinking is involved

Reply 33

OP

Original post by The Illuminati

I just look at the paper and I would have been guaranteed failure if I'd sat it. It's so difficult, it's beyond regurgitating facts (which I am an expert at). So much thinking is involved

the grade boundaries were low but the suggest questions just kill it lol.

Reply 34

The Illuminati

Original post by undertaker1

the grade boundaries were low but the suggest questions just kill it lol.

Isn't suggest code for 'you won't actually know the answer but we'll ask you anyway"

Reply 35

OP