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OCR Biology F212 Revision [3rd June 2013] (Now Closed)

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Reply 2220
Avatar for zaijafri
zaijafri
for the phagocytosis question loads of girls talked about clonal expansion and selection, that cant be right can it even the teacher supported there answer.
Original post by zaijafri
for the phagocytosis question loads of girls talked about clonal expansion and selection, that cant be right can it even the teacher supported there answer.


I think you could speak about both. It's hard to get 7 marks talking about phagocytosis alone, especially when they've given you the first stage. So yes, I do think it's right, but I also think talking about phagocytosis is right.

Sometimes you just have to employ a bit of common sense, you know about anti-gen presentation and you know about phagocytosis, the only difference is at the end of phagocytosis the harmless products of digestion are absorbed and at the end of anti-gen presentation the antigens are used to form an anti gen presenting cell. But they both have the same first stages and the question asked you what happened after the first stage.
Original post by Liamnut
I think you could speak about both. It's hard to get 7 marks talking about phagocytosis alone, especially when they've given you the first stage. So yes, I do think it's right, but I also think talking about phagocytosis is right.

Sometimes you just have to employ a bit of common sense, you know about anti-gen presentation and you know about phagocytosis, the only difference is at the end of phagocytosis the harmless products of digestion are absorbed and at the end of anti-gen presentation the antigens are used to form an anti gen presenting cell. But they both have the same first stages and the question asked you what happened after the first stage.


How many marks, if any would I get for this, this was my exact answer, thanks

Pathogen engulfed by macrophage cells from the immune system
Removal of antigens from pathogens
Antigens presented on surface of engulfing cells
They then find the lymphocytes that can neutralise the particular antigen
Selection of correct T killer cells and T helper cells
Reproduction of T killer cells
T killer cells search for infected cells
T killer cells attach to infected cells
T killer cells secrete toxic substances (hydrogen peroxide) into
infected cells to kill the cell and the pathogens it contains
Original post by Student296
How many marks, if any would I get for this, this was my exact answer, thanks

Pathogen engulfed by macrophage cells from the immune system
Removal of antigens from pathogens
Antigens presented on surface of engulfing cells
They then find the lymphocytes that can neutralise the particular antigen
Selection of correct T killer cells and T helper cells
Reproduction of T killer cells
T killer cells search for infected cells
T killer cells attach to infected cells
T killer cells secrete toxic substances (hydrogen peroxide) into
infected cells to kill the cell and the pathogens it contains


it didnt even ask about that for ****s sakes!!
it said what happens after a phagocyte attaches to a pathogen-when it attaches to a antibody to attach to the phagocyte.

anything after that will.get you a mark.

why the **** have i even joined tsr if all you people ever do is act like youre right and treat what you wrote as the right answer.

even ur unofficial ms is ****in stupid. my man just thinks hes right so what he says goes. i wish he ****ing fails too

you little ***** think everything is a trick question. open ur fcking eyes and use what u got





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Reply 2224
Avatar for Gotzz
Gotzz
13
Original post by NielsBohrsDad
it didnt even ask about that for ****s sakes!!
it said what happens after a phagocyte attaches to a pathogen-when it attaches to a antibody to attach to the phagocyte.

anything after that will.get you a mark.

why the **** have i even joined tsr if all you people ever do is act like youre right and treat what you wrote as the right answer.

even ur unofficial ms is ****in stupid. my man just thinks hes right so what he says goes. i wish he ****ing fails too

you little ***** think everything is a trick question. open ur fcking eyes and use what u got





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:lolwut:
Original post by NielsBohrsDad
it didnt even ask about that for ****s sakes!!
it said what happens after a phagocyte attaches to a pathogen-when it attaches to a antibody to attach to the phagocyte.

anything after that will.get you a mark.

why the **** have i even joined tsr if all you people ever do is act like youre right and treat what you wrote as the right answer.

even ur unofficial ms is ****in stupid. my man just thinks hes right so what he says goes. i wish he ****ing fails too

you little ***** think everything is a trick question. open ur fcking eyes and use what u got





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That's because everything is as convoluted and reverse as we make it out to be :wink:


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Reply 2226
Avatar for griffalo
griffalo
what? where is the unoffical mark scheme?
Original post by jamesmact
That's because everything is as convoluted and reverse as we make it out to be :wink:


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just as reverse as the direction i give it to your sister in
Original post by griffalo
what? where is the unoffical mark scheme?


griffalo its on the first page of this thread. dont waste your time itl only worry you cos its not a mark scheme. its his answers for the exam
Original post by Williamhodds
Damn it; I put secondary structure instead of primary, I thought primary structure was how amino acids bond and secondary was the sequence, only 1 mark I suppose! :cool:


i put flipping polypeptide chain haha, i always misinterpret the questions! this has happened to all my exams i have sat this past month looool
Original post by NielsBohrsDad
just as reverse as the direction i give it to your sister in

:biggrin:
Crackhead
Reply 2231
Avatar for Saif95
Saif95
12
Original post by NielsBohrsDad
just as reverse as the direction i give it to your sister in


LOL
Reply 2232
Avatar for griffalo
griffalo
We had many of the same answers so lets hope that As Biology has gone well!!!
Best of luck

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Reply 2233
Avatar for griffalo
griffalo
Okay thanks v.muxh

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Reply 2234
Avatar for griffalo
griffalo
Much* that was cringe worthy haha

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Original post by BioGeek
NOTE:4 marks are missing!



Was there a 1 or 2 mark question asking about the function of haemoglobin or did my mind just make that up?
Original post by NielsBohrsDad
it didnt even ask about that for ****s sakes!!
it said what happens after a phagocyte attaches to a pathogen-when it attaches to a antibody to attach to the phagocyte.

anything after that will.get you a mark.

why the **** have i even joined tsr if all you people ever do is act like youre right and treat what you wrote as the right answer.

even ur unofficial ms is ****in stupid. my man just thinks hes right so what he says goes. i wish he ****ing fails too

you little ***** think everything is a trick question. open ur fcking eyes and use what u got





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You're going to fail so ****ing badly. The fact that you can't spell suggests a complete lack of understanding of the English language and thus, discredits anything you say pertaining to comprehensive ability-the question required comprehension.

Did I not clearly highlight the fact that there are two types of phagocytes, macrophages and neutrophils. Macrophages are involved in anti-gen presentation and the first stages of ant-gen presentation are the same as phagocytois.

We did "use what u got", you're just to ****ing blind to see that.
Original post by Student296
Was there a 1 or 2 mark question asking about the function of haemoglobin or did my mind just make that up?


There was, think it was just 1 mark.
Original post by NielsBohrsDad
just as reverse as the direction i give it to your sister in


Oh! Makes sense...!


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Reply 2239
Avatar for Asad96
Asad96
The poll is now closed, how do i see the results? :smile:

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