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OCR Biology: 08/06/2010 Molecules, Biodiversity, Food and Health

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I thought it was alright. I was a bit bummed that stuff came up on food spoiling as I didn't reallty think it warranted 3 marks?
Also, 7 marks for the antibody thing?
Apart from: diff primary structure so different complementary shape for antigen, strong disulfide bonds, hinge region, was there a lot more you could put?
But they were all pretty answerable.
Reply 301
Avatar for DR_X
DR_X
That wasn't too bad...... couldn't have been much worse.......
Reply 302
Avatar for pluuum
pluuum
yes it wasn't bad
it was better than all the past papers i have been doing
hoping for an A if not a B will suffice providing i get an A overall :biggrin:

anyone else found that classification system question (difference between using domain and kingdom classification system) quite tricky? i remember reading it on the book but i cannot remember the reasoning :s-smilie:
Reply 303
Avatar for shwty2010
shwty2010
pluuum
yes it wasn't bad
it was better than all the past papers i have been doing
hoping for an A if not a B will suffice providing i get an A overall :biggrin:

anyone else found that classification system question (difference between using domain and kingdom classification system) quite tricky? i remember reading it on the book but i cannot remember the reasoning :s-smilie:


I found that question tricky just made up the answer :s-smilie:
Reply 304
Avatar for Tacita
Tacita
11
SarahMorgan2793
I thought it was alright. I was a bit bummed that stuff came up on food spoiling as I didn't reallty think it warranted 3 marks?
Also, 7 marks for the antibody thing?
Apart from: diff primary structure so different complementary shape for antigen, strong disulfide bonds, hinge region, was there a lot more you could put?
But they were all pretty answerable.


I think you probably should get a mark for the following points on the antibody Q:

-Variable region
-Is antigen-binding site
-Different variable regions have different sequences of amino acids
-Each variable region is specific to a certain antigen
-Each antibody has more than one variable region/antigen-binding site
-So can attach to more than one pathogen
-Agglutination
-Constant region is the same in each antibody
-Allows antibody to bind to receptors on phagocytes/mast cells
-Hinge region
-Allows flexibility during antigen binding
-Disulphide bonds hold polypeptide chains together
-Maybe something about heavy and light chains

Plus there's probably points I've missed =o
Reply 305
Avatar for KMan1
KMan1
Out of all the F212 papers that has to be the easiest. I thought Jan 10 wasn't hard but this one was better. What people write about the:

1. differences between domain and classication question
2. EIA - reasons for it?
3. taxomony questions
4. biodiversity questions
i thought it went okay, but some of the questions were a bit :|

the food spoilage one was just a waffle and so was the EIA one. Apart from that it was fine :smile:
Reply 307
Avatar for DR_X
DR_X
Tacita
I think you probably should get a mark for the following points on the antibody Q:

-Variable region
-Is antigen-binding site
-Different variable regions have different sequences of amino acids
-Each variable region is specific to a certain antigen
-Each antibody has more than one variable region/antigen-binding site
-So can attach to more than one pathogen
-Agglutination
-Constant region is the same in each antibody
-Allows antibody to bind to receptors on phagocytes/mast cells
-Hinge region
-Allows flexibility during antigen binding
-Disulphide bonds hold polypeptide chains together
-Maybe something about heavy and light chains

Plus there's probably points I've missed =o


lol You make that question look easy......

agglutination!!.......I wrote, agglugation.....I feel sorry for myself....:frown:
Reply 308
Avatar for Tacita
Tacita
11
DR_X
lol You make that question look easy......

agglutination!!.......I wrote, agglugation.....I feel sorry for myself....:frown:


I had a bad feeling there was going to be a big question on antibodies, so I memorised the mark scheme. You don't know how pleased (and slightly smug) I was when I turned the page and saw that question! :o:

Aww, don't feel sorry for yourself *hug* Personally, I think 'agglugation' sounds much cooler.... :p:
Reply 309
Avatar for pluuum
pluuum
Tacita
I had a bad feeling there was going to be a big question on antibodies, so I memorised the mark scheme. You don't know how pleased (and slightly smug) I was when I turned the page and saw that question! :o:

Aww, don't feel sorry for yourself *hug* Personally, I think 'agglugation' sounds much cooler.... :p:


Hahaha i memorised the antibody thing too, i skipped a few pages at the start so i can answer that question first ahaha :biggrin:
polzeath.sunset
synoplastic and apoplastic? What are they? Dyou mean symplast and apoplast cuz if you do they arent on tomorrows paper :biggrin:

ha you got me paranoid there! :eek: . yeah im an idiot, realised im doing AQA not OCR. and i meant the symplastic and apoplastc pathways in plants. i guess the syllabus is different.
nathaliexapple
ha you got me paranoid there! :eek: . yeah im an idiot, realised im doing AQA not OCR. and i meant the symplastic and apoplastc pathways in plants. i guess the syllabus is different.


haha, i do like to worry people unnecessarily :P lol how did it go?

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