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

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    Are you revising F212 as a hole or by topics/module?
    • Thread Starter
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    IDM bring on the whole thing
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    Tomorrow will be my last biology class, ever. And **** me am I glad


    I want to leave it with a bang though

    90%UMS plus is what I want and by **** it is what I will get.
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    (Original post by yusra121)
    Are you revising F212 as a hole or by topics/module?
    I am just doing past papers tey ****
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    (Original post by yusra121)
    Are you revising F212 as a hole or by topics/module?
    want to revise
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    (Original post by otrivine)
    want to revise
    ask me a question back!!!
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    (Original post by BioGeek)
    ask me a question back!!!
    you did not mark my answer


    give the structure and function of antibody (6)
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    (Original post by otrivine)
    want to revise
    Lets go
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    it is correct and you know it m8

    Antibody is responsible for neutralising and destroying antigens.
    Antibody consist a four polypeptide chain, which is held by disulphide bridges.
    Antibody also has a constant region which allows it bind onto the plasma membrane of phagocytes such as a macrophage
    Antibody also have a variable region, which is complementary to a specific antigen, which is determined by the amino acid sequence.
    Antibodies also have a hinge region, which allows flexibility, and causes the antibody to bind on one or more antigen, this is known agglutination and aids in photolysis
    Antibodies can also neutralise toxins
    Antibodies also bind to onto the antigens of a pathogen, and thus prevents pathogens from entering a host cell.
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    (Original post by yusra121)
    Lets go
    ok


    Describe structure of collagen (3)
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    (Original post by BioGeek)
    it is correct and you know it m8

    Antibody is responsible for neutralising and destroying antigens.
    Antibody consist a four polypeptide chain, which is held by disulphide bridges.
    Antibody also has a constant region which allows it bind onto the plasma membrane of phagocytes such as a macrophage
    Antibody also have a variable region, which is complementary to a specific antigen, which is determined by the amino acid sequence.
    Antibodies also have a hinge region, which allows flexibility, and causes the antibody to bind on one or more antigen, this is known agglutination and aids in photolysis
    Antibodies can also neutralise toxins
    Antibodies also bind to onto the antigens of a pathogen, and thus prevents pathogens from entering a host cell.
    6/6 good!

    my turn
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    (Original post by otrivine)
    6/6 good!

    my turn
    Describe the structure of starch (4)
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    (Original post by BioGeek)
    Describe the structure of starch (4)
    starch is made up of alpha glucose subunits.

    Consists of a mixture of straight chain amylose and branched amylopectin.

    in Amylopectin there are 1,4 glycosidic and some 1,6 glycosdic bonds while amylose only contains 1,4 glycosidic bonds.


    starch contains C H O only

    compact so makes it an excellent storage molecule

    forms starch grains
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    (Original post by otrivine)
    starch is made up of alpha glucose subunits.

    Consists of a mixture of straight chain amylose and branched amylopectin.

    in Amylopectin there are 1,4 glycosidic and some 1,6 glycosdic bonds while amylose only contains 1,4 glycosidic bonds.


    starch contains C H O only

    compact so makes it an excellent storage molecule

    forms starch grains
    Excellent, correct however i must go!!!
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    (Original post by BioGeek)
    Excellent, correct however i must go!!!

    Describe the process of proteins synthesis (5)
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    (Original post by Sherlockedd)
    The elastic fibres in their alveoli have become damaged and therefore they cannot recoil as effectively, leading to less exhalation.
    Thanks a lot get it now


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    Could anyone share their notes on smoking related disease please? Really stuck on this :L


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    (Original post by cloud19)
    Could anyone share their notes on smoking related disease please? Really stuck on this :L


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    What about it?

    Posted from TSR Mobile
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    (Original post by Sherlockedd)
    What about it?

    Posted from TSR Mobile
    Just not sure about athersclerosis and like how tar in cigarette can cause emphysema


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    Atherosclerosis is made easier by damaging the endothelial lining of the artery, thus it's easier to deposit cholesterol etc into it. Tar causes mutations in the bronchi and bronchioles, it paralyses cilia and stimulates goblet cells to produce mucus causing a build up of mucus which traps pathogens and eventually gravity pulls it downwards to the lungs causing various infections.

    Nicotine raises blood pressure thus causing hypertension by making the platelets sticky, and this allows atheromas to form more easily, and these atheromas cause blockages in arteries, leading to strokes or CHD.


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