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

AQA AS Biology 7401/1 and 7401/2 Exam - 26th May and 7th June 2016 Watch

Announcements
    Offline

    1
    ReputationRep:
    The protein receptor question screwed me up was did others write
    Offline

    1
    ReputationRep:
    (Original post by Sajjjid)
    How did you get that? I swear you measure both the sizes and then divide the bigger by the smaller. I got 1.7x. Plus by looking at it it didnt look 3x bigger

    It was a circle, and said how times bigger is the area of D (or something) than B. So you do ( can't remember the values exactly)
    Pi x r^2 as a ratio between the 2 (D and B)

    Pi x 1.1^2 : pi x 0.65^2
    3.8 : 1.33
    Get the right had side down to one
    2.9 :1
    So it was X2.9 bigger
    I hope so anyway lol
    Offline

    1
    ReputationRep:
    (Original post by Jamescullen2505)
    I think you did what I did and measured the radius instead of the diameter
    It wouldn't matter whether you measured the radius or diameter because you would still get the same ratio. I also got 1.7x ☺️
    Offline

    2
    ReputationRep:
    (Original post by Jamescullen2505)
    I think you did what I did and measured the radius instead of the diameter
    Nah I done diameter. But either way whether you do diameter or radius you should get the same answer. But it was how many times bigger e.g 10 is 2x bigger than 5. So is 20 2x bigger than 10
    Offline

    9
    ReputationRep:
    (Original post by OfficialChemist)
    Nah blud everything i revised never popped up
    the vast majority of topics came up
    Offline

    3
    ReputationRep:
    AQA took the piss with this, they defos want us to fail
    Offline

    3
    ReputationRep:
    (Original post by Sajjjid)
    Nah I done diameter. But either way whether you do diameter or radius you should get the same answer. But it was how many times bigger e.g 10 is 2x bigger than 5. So is 20 2x bigger than 10
    Rah true fam
    Offline

    1
    ReputationRep:
    (Original post by Sajjjid)
    How did you get that? I swear you measure both the sizes and then divide the bigger by the smaller. I got 1.7x. Plus by looking at it it didnt look 3x bigger
    Do you remember the measurement of D and B?
    Offline

    2
    ReputationRep:
    (Original post by ineedA)
    What was the haemoglobin one? For water potential I put sea water contains salt - Lower water potential - water moves into worm down water potential grad via osmosis , worm swells , may burst , death
    Wouldn't water move out of the worm? Because water moves from higher water potential in worm to lower water potential in sea water?


    Posted from TSR Mobile
    Offline

    2
    ReputationRep:
    (Original post by Hello_987123)
    It was a circle, and said how times bigger is the area of D (or something) than B. So you do ( can't remember the values exactly)
    Pi x r^2 as a ratio between the 2 (D and B)

    Pi x 1.1^2 : pi x 0.65^2
    3.8 : 1.33
    Get the right had side down to one
    2.9 :1
    So it was X2.9 bigger
    I hope so anyway lol
    Damnn. You guys went in doing the area of a circle and everything. But I remember quit well D wasnt 3x bigger than the size of B
    Offline

    9
    ReputationRep:
    2.9x was the correct answer, although im sure they'll accept answers in the range of 2.5-3.5ish
    Offline

    3
    ReputationRep:
    we need an unofficial markscheme cos moretime everyone's lost the plot
    Offline

    2
    ReputationRep:
    (Original post by Virolite)
    the vast majority of topics came up
    None of meisos came up. WTFF
    Offline

    1
    ReputationRep:
    What did everyone out for the phosphate and embryo question??
    Offline

    7
    ReputationRep:
    (Original post by Virolite)
    the vast majority of topics came up
    - Transcription
    - Translation
    - Mitosis and Meiosis only barely
    - Taxonomy
    - Insects
    - Fish
    - Heart

    But nah - focus the papers on enzymes
    Offline

    2
    ReputationRep:
    Hate the fact that nearly nothing on human biology came up except for the weird ones like haemoglobin and emphysema. Was looking for some good ol' factual recall about heart and lungs 😭
    Oh well


    Posted from TSR Mobile
    Offline

    3
    ReputationRep:
    (Original post by alicepennington)
    What did everyone out for the phosphate and embryo question??
    i said hydrolysis of phosphate releases energy etc which is used in reactions but im dumb so that's most likely wrong
    Offline

    2
    ReputationRep:
    (Original post by Jason.CCY)
    Do you remember the measurement of D and B?
    Do you kno how to access the memory of a casio calc?
    Offline

    2
    ReputationRep:
    (Original post by Jason.CCY)
    Do you remember the measurement of D and B?
    Wait I rememeber. I had 2.3/1.3 which gave 1.76
    Offline

    1
    ReputationRep:
    (Original post by OfficialChemist)
    i said hydrolysis of phosphate releases energy etc which is used in reactions but im dumb so that's most likely wrong
    I put that too but wasn't sure! And something about phosphate changing the shape of enzymes so other substrates fit? But tbh I was just trying to think of anything I knew about phosphate so not sure if that's right
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    How are your GCSEs going so far?
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • 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

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