OCR Biology AS F211/F212 exams Thursday 21st May &amp; Monday 1st June 2015

Well I should, and want to go into the exam on a high B or an A, but I'm on a high D lol.

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Reply 185

Siddhart1998

Anyone have access to June 2014 papers?

Reply 186

Original post by Siddhart1998

Anyone have access to June 2014 papers?

I have the F211 June 2014 Paper but not digitally, I can take pictures and send it you if you want?

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Reply 187

username1550407

Please can someone explain the difference between clonal selection and clonal expansion for T/B lymphocytes in f212? Also, which order does it occur it? Different sources tell me different things and I'm getting very confused!

Thanks

Reply 188

cinderella25

11

Original post by Siddhart1998

Got 39! Found out today.
Initially had 30. Redid evaluative and got 39 ��.
Which I think is funny because I'm not very good at biology. Opposite with physics. I probably got an E for the coursework for that but I'm actually good at the subject. ��

Hey I have my practicals this week on Wednesday and just wanted to know what to expect for the practicals.

Qualitative Task 1: the aim of this Task is to investigate different chemical solutions that can be used to precipitate proteins.

Quantitative Task 3: the aim of this Task is to determine the effect of calcium ions on the coagulation of milk proteins.

Evaluative Task 3: the aim of this Task is to evaluate an investigation of the effect of calcium ions on the coagulation of milk proteins

Do you have any advice? Thanks!

Reply 189

cinderella25

11

Original post by HecTic_H

I have the F211 June 2014 Paper but not digitally, I can take pictures and send it you if you want?

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Can you please send me the paper aswell? Just PM me thank you!

Reply 190

Nievahh

Original post by HecTic_H

I have the F211 June 2014 Paper but not digitally, I can take pictures and send it you if you want?

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Would you mind sending it to me also? I actually sat that exam but I'm retaking :yes:

Reply 191

username1514273

1

Original post by Nievahh

Would you mind sending it to me also? I actually sat that exam but I'm retaking :yes:

Can u send it to me aswell please.

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Reply 192

ChoccyPhilly

13

Original post by Golde

Please can someone explain the difference between clonal selection and clonal expansion for T/B lymphocytes in f212? Also, which order does it occur it? Different sources tell me different things and I'm getting very confused!

Thanks

Stanges of immune response:
1. Phagocytosis
2. Antigen presentation (on phagocytes)
3. T lymphocytes bind to these antigens (complementary) - clonal selection
4. Activated T lymphocyte divides like mad (clonal expansion) and can differentiate into helper cells and memory cells.
5. Release of cytokines by (the now activated) T helper cells activate B lymphocytes
6.B lymphoctes have antibodies complementary to antigen.
7. B lymphocytes divide like mad into plasma cells, which produce and secrete antibodies

If i made a mistake, do say :smile:

Reply 193

Shall I send it in here? It's easier for me I don't know how it works haha?

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Reply 194

Nievahh

Original post by HecTic_H

Shall I send it in here? It's easier for me I don't know how it works haha?

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Sure

thank you!

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Reply 195

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Reply 196

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That should be it x

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Reply 197

happydays507

2

Hey guys, does anyone know of or have a link to the F212 2014 paper? I would be SO grateful if anyone could let me know please, thanks!

Reply 198

spiritless98

19

Hey guys
I just need to ask is this a bad way of revising
And will I not do well if I do this

* memorise detailed class notes
* answer past papers using mark schemes and memorise these including all legacy past papers?

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Reply 199

Siddhart1998