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Anyone did the GSCE AQA Biology Higher exam??? watch

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    well, mitosis is when a cell reproduces itself by splitting to form two identical offspring!!!
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    (Original post by Browny)
    well, mitosis is when a cell reproduces itself by splitting to form two identical offspring!!!
    You have gone back on yourself there. It a post a little earlier you said that the mutation rate was low.

    It was the last part of the last question on a higher paper. The answer was not: Yes.
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    Insulin is produced by genetic engineering
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    (Original post by Browny)
    Insulin is produced by genetic engineering
    And genetic engineering that uses bacteria is powered by mitosis? Agreed?

    And in mitosis there are sometimes mutations. You said so yourself.

    Please just admit it.
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    NO, cause Mutations occur ''naturally'', probably by ''natural'' background radiation!!!!
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    in the AQA spescification it says:
    "Genes from the chromosomes of humans and other organisms can be cut out using enzymes and transferred to bacterial cells. the transferred gene continues to make the same protein in a bacterial cell. By culturing the genetically identical bacteria on a large scale, commercial quatities can be produced."

    make what you want of that.
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    Yeah, mister 'know it all'
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    and in the lonsdale science revision guide:
    "The plasmid is reinserted into a bacterium which starts to divid rapidly. As it divides it replicates the plasmid and soon there are millions of them - each with instructions to make insulin."
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    (Original post by Browny)
    Yeah, mister 'know it all'
    lol
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    (Original post by Undry1)
    in the AQA spescification it says:
    "Genes from the chromosomes of humans and other organisms can be cut out using enzymes and transferred to bacterial cells. the transferred gene continues to make the same protein in a bacterial cell. By culturing the genetically identical bacteria on a large scale, commercial quatities can be produced."

    make what you want of that.
    I stand by my answer. It was a three mark question, and the all was done especially in bold, I think therefore that the answer (despite what it may say in the spec.) is Yes in theory, but no in practice as mutations could occur.
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    (Original post by Undry1)
    and in the lonsdale science revision guide:
    "The plasmid is reinserted into a bacterium which starts to divid rapidly. As it divides it replicates the plasmid and soon there are millions of them - each with instructions to make insulin."
    Look up mitosis or DNA replication and see if it says that mutations can occur.
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    admit u r wrong!!!!!
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    (Original post by Browny)
    admit u r wrong!!!!!
    I am not.
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    (Original post by LS.)
    Yes, during mitosis mistakes can be made - i.e cancer.
    Look at this quote. S/he is the founder of the Biology Society. They know their stuff.
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    u r wrong

    u r wrong

    nuh nuh nuhnhunhnuh
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    (Original post by Browny)
    Actually, the number of mistakes that remain incorporated into the DNA is even lower than this because cells contain special DNA repair proteins that fix many of the mistakes in the DNA that are caused by mutagens. The repair proteins see which nucleotides are paired incorrectly, and then change the wrong base to the right one.


    Well what is this then?????
    Do you or do you not admit here that mutations could occur in mitosis?
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    I really have no idea on what you guys are trying to prove anymore, and since I should be studying for chem, I don't have the time to do any research.

    But just thought I should say: Just because it's on the syllabus, doesn't make it 'true' - there's a lot of BS on syllabus thesedays to make it easier to teach.
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    were not all perfect

    If it is in the AQA syllabus, then it is right and i stand by Undry1 on this one!!!
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    (Original post by samdavyson)
    Look up mitosis or DNA replication and see if it says that mutations can occur.
    im just saying what the revision guide and the specification say.

    in response:
    mitosis:
    Before each cell division, a copy of each chromosome is made so that
    each body cell has exactly the same genetic information. This type of
    cell division is called mitosis.

    DNA replication:
    Asexual reproduction gives rise to individuals whose genetic
    information is identical with that of the parent. These genetically
    identical individuals are known as a clone.

    The cells of the offspring produced by asexual reproduction are
    produced by mitosis from the parental cells. They contain the same
    genes as the parents.



    hence the reference to clones in the question , i would assume.
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    (Original post by Browny)
    were not all perfect

    If it is in the AQA syllabus, then it is right and i stand by Undry1 on this one!!!
    That comeback is just plain daft.

    Just as the spec. say that they would all by indentical it happens not to be the case.
 
 
 

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