Turn on thread page Beta
    Offline

    2
    ReputationRep:
    (Original post by SGHD26716)
    How much does your book talk about cyctochrome c and ribosomal RNA. Mine just mentions that cyctochrome c is an example of protein and RNA for DNA evidence
    2 paragraphs or so, it just says that it's a protein and if 2 species have more of a similar sequence of cytochrome c, the more closely related they are

    That's all you really need to know i think
    Offline

    2
    ReputationRep:
    How did people do with the breadth specimen paper on the OCR website? I just did it and got 44/70, man that was hard!
    Offline

    22
    ReputationRep:
    (Original post by neil20143)
    How did people do with the breadth specimen paper on the OCR website? I just did it and got 44/70, man that was hard!
    I got 56. But why are you doing the breadth paper now?
    Offline

    22
    ReputationRep:
    (Original post by brodingoson)
    2 paragraphs or so, it just says that it's a protein and if 2 species have more of a similar sequence of cytochrome c, the more closely related they are

    That's all you really need to know i think
    Thanks mate
    Offline

    2
    ReputationRep:
    (Original post by SGHD26716)
    I got 56. But why are you doing the breadth paper now?
    Because I've got a mock in a few weeks. We don't do AS but sit internal exams instead.
    Offline

    22
    ReputationRep:
    (Original post by neil20143)
    Because I've got a mock in a few weeks. We don't do AS but sit internal exams instead.
    I see. Good luck
    Offline

    13
    ReputationRep:
    I think the whole thing with biology is that you never know how well you have done. Compared to chemistry or maths where there are set answers, biology is so dependent on the mark scheme. I know I got in the range of 50-60, but that 10 mark boundary is all down to how they mark the paper.
    Offline

    5
    ReputationRep:
    I'm expecting the next paper to be more differentiating than this one, just because extended response questions always spread out marks and the exam board will be using that to their grade boundaries
    Offline

    3
    I think Depth will cover;

    -Cardiac cycle and the heart
    -Spirometer (practical investigation) and ventilation mechanism
    - Enzymes and cofactors
    - Biological membranes, e.g. the role of the membrane and fluid mosaic model
    - Properties of water OR triglycerides and phospholipids
    - Calculation questions either involving Simpson's Index, Standard deviation, t-test
    - Evolution (evidence+Darwin's observations)
    Offline

    6
    ReputationRep:
    (Original post by brodingoson)
    Did they recommend buying the new spec. book?
    Nope got no push to buy anything, they said there were revision guides to buy but didn't enlarge much on it. Our textbook was useful though. We had OCR a level biology by oxford
    Offline

    0
    ReputationRep:
    (Original post by Aintsohappy)
    Does anyone know what topics are specific to each paper? I.e if there are certain module 2 things that will only be in breadth or depth? Thanks!
    heyy, the same topics can come up in both papers, but in the depth paper the questions can be maximum 9 mark with QWC. They're likely to be questions that follow on from each other linking to other topics. My teacher said that they are also likely to be quite similar to the old spec style questions so im revising from them
    Hope that helps
    Offline

    2
    Can someone explain the semi-conservative experiment please?
    Offline

    14
    ReputationRep:
    (Original post by haes)
    Can someone explain the semi-conservative experiment please?
    You could grow some bacteria in a food source that contains only 'heavy' isotope of nitrogen - N-15. After many generations, the DNA should only contain the heavy isotope of nitrogen. Some bacteria can be transferred to another food source containing the normal 'lighter' isotope of nitrogen - N-14. The DNA can be extracted from the bacteria and separated e.g. centrifuged. The more dense, heavier molecules (N-15) will stay at the bottom. it could be centrifuged bu mixing the DNA sample with cocentrated sugar solution then placing the mixture of DNA and sugar solution into test tubes and spinning them at high speeds
    There are other ways though of doing it
    Offline

    0
    ReputationRep:
    Hey, I think I missed a question, cause I answered the one where it was like name T Z X or something but I missed name W? Can anyone remember where exactly this question is, or tell me the few questions after it so I know I haven't missed a page? Thanks
    Offline

    6
    ReputationRep:
    (Original post by bunchesofpoppies)
    Hey, I think I missed a question, cause I answered the one where it was like name T Z X or something but I missed name W? Can anyone remember where exactly this question is, or tell me the few questions after it so I know I haven't missed a page? Thanks
    I think it said something like 'name what would be found in W' i don't think it said that exactly but something along those lines! It was only 1 mark so I wouldn't worry too much


    Posted from TSR Mobile
    Offline

    2
    ReputationRep:
    what are the required practicals we need to know
    Bullet point answers please.
    Offline

    0
    ReputationRep:
    Thanks! can anyone remember the question straight after the W question? X
    Offline

    8
    ReputationRep:
    (Original post by bunchesofpoppies)
    Thanks! can anyone remember the question straight after the W question? X
    It asked about a plant in a saltwater area and you had to suggest how it gets water into the xylem by osmosis, if the water potential of the water surrounding it is very low.
    Offline

    7
    ReputationRep:
    Does anyone have the depth in biology practice paper?
    Offline

    1
    ReputationRep:
    Does anyone know whether the answer on the classification table was animalia or eukarya? Panicking thinking I've read the table wrong
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: June 27, 2017
The home of Results and Clearing

1,704

people online now

1,567,000

students helped last year

University open days

  1. SAE Institute
    Animation, Audio, Film, Games, Music, Business, Web Further education
    Thu, 16 Aug '18
  2. Bournemouth University
    Clearing Open Day Undergraduate
    Fri, 17 Aug '18
  3. University of Bolton
    Undergraduate Open Day Undergraduate
    Fri, 17 Aug '18
Poll
Do you want your parents to be with you when you collect your A-level results?

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.