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    What did you his get for the beats per minute? I got 60
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    (Original post by laney1999)
    What did you his get for the beats per minute? I got 60

    It was 66.7
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    (Original post by laney1999)
    For marking points id say

    • Genetic code is degenerate= more than one set of 3 bases can code for an amino acid.

    • deletion causes frame shift = mutation always

    • if a mutation occurs, the tertiary structure is different

    • receptor protein therefore cannot accept the HIV and as a result. Infection cannot occur
    No marks for writing degenerate, because that won't cause a non functioning protien or what ever it said. I don't think you had to talk about frame shift. Talk about DNA base sequence amino acid sequence tertiary sequence and non longer complementary for full marks
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    (Original post by UK_Britain)
    It was 66.7
    But how is it possible to have .7 of a heartbeat?
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    (Original post by laney1999)
    But how is it possible to have .7 of a heartbeat?

    Was this the tick box one with a table?

    0.9 seconds represents 1 heart beat

    heart-rate x min^-1 is the same as heat-rate x 1/60

    So 1 heart beat was 0.9x1/60= 0.9/60 =66.7 heart rate
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    (Original post by UK_Britain)
    Was this the tick box one with a table?

    0.9 seconds represents 1 heart beat

    heart-rate x min^-1 is the same as heat-rate x 1/60

    So 1 heart beat was 0.9x1/60= 0.9/60 =66.7 heart rate
    I honestly can't remember.

    I remember that the ventricle pumped blood out once per second, which is why I said 60 because I don't see how the .7 is possible. They were both 1 markers anyway right?
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    (Original post by laney1999)
    I honestly can't remember.

    I remember that the ventricle pumped blood out once per second, which is why I said 60 because I don't see how the .7 is possible. They were both 1 markers anyway right?

    It depends on what you got as one beat, I think you got the beat as 1sec^-1 so you put 60, but it was 0.9 not 1
    And yh 1 mark. Stroke vol was 120-50=70
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    (Original post by UK_Britain)
    It depends on what you got as one beat, I think you got the beat as 1sec^-1 so you put 60, but it was 0.9 not 1
    And yh 1 mark. Stroke vol was 120-50=70
    Cool, grade boundary predictions?
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    (Original post by UK_Britain)
    No marks for writing degenerate, because that won't cause a non functioning protien or what ever it said. I don't think you had to talk about frame shift. Talk about DNA base sequence amino acid sequence tertiary sequence and non longer complementary for full marks
    Would i lose all the marks for saying it changes the variable region, i meant to say it changes the variable group, but they could mean the say thing right? Region/group similar.
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    (Original post by loliamsohappy)
    Would i lose all the marks for saying it changes the variable region, i meant to say it changes the variable group, but they could mean the say thing right? Region/group similar.
    You won't lose any marks they will have like 5 things you could say for 3 marks. Did you say no longer complementary?
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    (Original post by laney1999)
    Cool, grade boundary predictions?
    70% A
    60%B
    50% C
    40%D
    30% E
    30> U

    Roughly
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    (Original post by UK_Britain)
    You won't lose any marks they will have like 5 things you could say for 3 marks. Did you say no longer complementary?
    I think i said variable region is no longer complementary
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    (Original post by UK_Britain)
    70% A
    60%B
    50% C
    40%D
    30% E
    30> U

    Roughly
    😱😱😱 that low?!
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    (Original post by UK_Britain)
    70% A
    60%B
    50% C
    40%D
    30% E
    30> U

    Roughly
    Really that low??


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    (Original post by UK_Britain)
    70% A
    60%B
    50% C
    40%D
    30% E
    30> U

    Roughly
    Unlikely I'd say. Not 80 but shouldn't be that low. Maybe 74-75% for an A
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    (Original post by rosemondtan)
    Unlikely I'd say. Not 80 but shouldn't be that low. Maybe 74-75% for an A
    This is still quite good
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    (Original post by rayofsunshine98)
    Really that low??


    Posted from TSR Mobile

    We didn't have an ISA, we had to do all the units together, it's a new spec. I 2009 the new spec was as low as 65% for an A
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    (Original post by rosemondtan)
    Unlikely I'd say. Not 80 but shouldn't be that low. Maybe 74-75% for an A
    Doubt it, we didn't do an ISA, we had to do all the units in one exam, and it's a new spec in 2009 new spec an A was 67%
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    (Original post by UK_Britain)
    Doubt it, we didn't do an ISA, we had to do all the units in one exam, and it's a new spec in 2009 new spec an A was 67%
    That would be amazing if they were that low, I'm not to sure though... Really seems too low
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    I go to a grammar school and our head of biology said both papers were hard so hopefully the grade boundaries will be low! 🙏🙏🙏


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