Hey there! Sign in to join this conversationNew here? Join for free

AQA BIOL5 Biology Unit 5 Exam - 22nd June 2011 watch

  • View Poll Results: Are you resitting this unit?
    YES!
    12.91%
    NO!
    87.09%

    Offline

    2
    ReputationRep:
    (Original post by Sparkly-Star)
    So... what's with the face? That's excellent without the essay.
    I need an A overall, and I doubt I got an A in unit 4, so I really need a mid-high A in this unit
    • Thread Starter
    Offline

    1
    ReputationRep:
    (Original post by tehsponge)
    I need an A overall, and I doubt I got an A in unit 4, so I really need a mid-high A in this unit
    Oh ok, I understand in that sense. I have the same issue with maths.
    Offline

    1
    ReputationRep:
    (Original post by tehsponge)
    9 (d) The scientists analysed the DNA on the Y chromosome and the DNA in the
    mitochondria of the Swedish wolves. They concluded that the Swedish wolf population
    descended from one male wolf from Finland and one female wolf from Russia.
    9 (d) (i) Explain why DNA on the Y chromosome helped them to reach this conclusion.

    answer:

    Y chromosome inherited/comes from male parents/only found in males;

    What?! That doesn't even follow from the question...
    Just some thoughts, the Y chromosome of the present swedish wolf and past swedish wolf(only 1) will be similar. Well due to crossing overs and all those meiosis bit does change some of the DNA bits but the overall DNA should be pretty much similar. Dont you think so? So the answer is relevant.. :dontknow:
    Offline

    0
    ReputationRep:
    hey in genetic fingerprinting is all the dna cut up into fragments?
    Offline

    2
    ReputationRep:
    (Original post by Cyanohydrin)
    'How Science Works is a load of cack used to fill up space and piss people off. Discuss'
    well done u just got 25 marks for the essay thats if i marked ur paper
    fantastic i love it
    ill give ur post a positive rating for that

    or another question cud be
    Q: we have given u a really hard exam what shud we do the examiner who wrote this paper
    A: :mad::mad:
    is the answer correct YES well done 25 marks
    Offline

    0
    ReputationRep:
    (Original post by Destroyviruses)
    I was just guessing, trying to find a reason why the book says only small strands can be used in PCR.

    Maybe it got confused with sequencing.
    all i know is pcr replicates smaller amounts than in vivo, which has the ability to replicate large amounts of DNA
    Offline

    2
    ReputationRep:
    (Original post by angel1992)
    hey in genetic fingerprinting is all the dna cut up into fragments?
    yes it is
    the dna is extracted from the cell
    then cut using restriction endonuclease enzymes
    Offline

    0
    ReputationRep:
    (Original post by hahaff)
    well done u just got 25 marks for the essay thats if i marked ur paper
    fantastic i love it
    ill give ur post a positive rating for that

    or another question cud be
    Q: we have given u a really hard exam what shud we do the examiner who wrote this paper
    A: :mad::mad:
    is the answer correct YES well done 25 marks
    heh?
    Offline

    2
    ReputationRep:
    guys is it compulsory to do the essay
    i mean the essay is 25 marks and u cud spend alot more time on the other questions
    hmm il probs do that if both the essays are based on genetics
    Offline

    0
    ReputationRep:
    (Original post by Cyanohydrin)
    because you can isolate a specific gene....
    DNA replication does use primers, as some kind of enzyme. but not mentioned in spec
    Offline

    1
    ReputationRep:
    Does anyone know what the difference between RNA polymerase and DNA polymerase is? Is it just that RNA polymerase is used 'naturally' in cells? Or is it that RNA polymerase is used to make RNA (so replaced thymine with uracil) wheras DNA polymerase is used to make DNA (so uses the bases CGTA)?
    Offline

    0
    ReputationRep:
    in the nt it says that genetic fingerprinting pcr is used to amplify the dna sample, does it amplify all the dna sample, and if so how, i though all the dna sample couldnt be amplified in pcr, which only amplifies small amounts?
    Offline

    0
    ReputationRep:
    (Original post by Destroyviruses)
    Lol !

    Private schools try to make you conform and be normal

    Art schools encourge you do deviate from the norm!
    hahahahahahhahhhahha... that always gets me
    Offline

    0
    ReputationRep:
    I'm bricking myself about this exam! I've covered everything in the spec but there's so much to remember! And my essays have consistently been B/C grade. I really need a B in this unit so I'm hoping for a fairly nice essay.
    Offline

    2
    ReputationRep:
    (Original post by hahaff)
    guys is it compulsory to do the essay
    i mean the essay is 25 marks and u cud spend alot more time on the other questions
    hmm il probs do that if both the essays are based on genetics
    Well you could still get an A even if you left the essay, lol. You'd be able to get a max of 75% without even touching the essay, but you'd have to be a HSW god.
    Offline

    0
    ReputationRep:
    guys for chap 13 i dont understand it says fsh stimulates oestrogen to be prodcued but then oestrogen inhibits fsh?

    for up to day 10 oestrogen stimulaes rise in fsh, wtf though it inhibits it?????



    MANY THANKSSSSSSSSSSSSS
    Offline

    0
    ReputationRep:
    (Original post by OriginOfShowbiz)
    I could only find June 2010. Out of a total of 100:
    A* - 69
    A - 62
    B - 55
    C - 49
    D - 43
    E - 37
    this made me cream my pants
    Offline

    0
    ReputationRep:
    How much detail will I need on translation? Is this ok:
    (Happens in cytoplasm of cell)
    1: Ribosome binds to mRNA, finds the start codon (AUG)
    2: tRNA brings correct amino acid to the ribosome
    3: Ribosome reads the next codon
    4: tRNA's continue to line up amino acids along the chain
    5: Peptide bonds join amino acids
    6: Ribosome continues along mRNA until it reaches the stop condon
    Offline

    0
    ReputationRep:
    (Original post by kingsmod1)
    guys for chap 13 i dont understand it says fsh stimulates oestrogen to be prodcued but then oestrogen inhibits fsh?

    for up to day 10 oestrogen stimulaes rise in fsh, wtf though it inhibits it?????



    MANY THANKSSSSSSSSSSSSS
    oestogen inhibits FSH at low levels, but once it exceeds a certain concentration at around 10 days usually, it stimulates it (positive feedback)
    Offline

    0
    ReputationRep:
    (Original post by 5mattcolour)
    How much detail will I need on translation? Is this ok:
    (Happens in cytoplasm of cell)
    1: Ribosome binds to mRNA, finds the start codon (AUG)
    2: tRNA brings correct amino acid to the ribosome
    3: Ribosome reads the next codon
    4: tRNA's continue to line up amino acids along the chain
    5: Peptide bonds join amino acids
    6: Ribosome continues along mRNA until it reaches the stop condon
    you need to refer to how the anticodon of tRNA binds to the codon of mRNA.
 
 
 
Poll
Do you agree with the PM's proposal to cut tuition fees for some courses?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.