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    Please comment if you think these are wrong/you know some questions I missed etc.

    1. a) A=iris, controls the amount of light entering the eye
    B=retina, where the image is focused, detects the light rays [2]

    b) cornea, lens [2]

    c) They each receive different alleles from the parents so their phenotypes are different from having different recessive/dominant alleles [possibly 2]

    d) The 2 eyes see images which overlap and the brain compares the two to judge distance - seeing how similar/different the images are [2]

    Total: 8

    2. a) auxins [1]

    b) Charlotte - the roots are growing towards gravity so are positvely geotrophic [2]

    Total: 3

    3. a) 33g [1]

    b) She also needs protein for the growing foetus - her EAR would increase [1]

    c) f f (mother) F f (father) = 50% [2]

    d) t t (mother) T t (father) = 50% [2]

    Total: 6

    4. a) stimulant because increasing the amount of neurotransmitters [2]

    b) 6 mark - describe the graph and explain why a placebo is used eg reduces psychological effects, fairer test, accurately see if the drug has any effect [6]

    Total: 8

    5. a) The tigers have a lack of habitats so fewer reliable food sources, possible mating partners etc. [3]

    b) As the numbers of predator increase, the numbers of prey decrease. There is cyclical fluctuation - the predators and prey have similar graphs but a time difference. [2]

    Total: 5

    6. a) Phylum, Order, Genus [2]

    b) They evolve with different gene pools and eventually their DNA becomes so different they are considered different species [2]

    Total: 4

    7. a) they compete with other organisms eg. bees for the nectar, as well as compete with each other (interspecific/intraspecific competition) [1]

    b) Their habitat and role in that habitat - they both play the same role of feeding on the nectar in their habitat [1]

    c) They have evolved to feed from oak trees instead of bushes so have different mouth parts to allow them to do this [1]

    Total: 3

    8. a) 1940-1980 [1]

    b)

    c) The gradient of the line - there will probably be a range for this as the graph was a little ambiguous so 0.5-0.7/80 = 0.00625-0.00875 [2]

    d) With a hugely increasing population, it will become harder to think about the future when developing because there will be more people now to consider or something like that [2]

    Total:

    9. The controversial 6 mark - 2 or 5%? (I put 2). The energy is lost by egestion, excretion and respiration. There is not enough energy left for another trophic level because the efficiency is so low - most of the energy at each stage is used for things other than growth. [6]

    Total: 6

    10. a) D because it has a thicker wall to allow for higher pressure blood to travel to the body and is the mirror image of a normal heart [2]

    b) I'm not sure [how is the transplant surgery different]- I put the vessels eg. vena cava would be on the opposite side to normal [2]

    c) 6300 [1]

    d) ad: the doctors need to know if someone has it to carry out treatments, quite a few people are affected by it,

    dis: not that many people are affected by it, could be expensive, could cause harm to the foetus, parents may disagree [2]

    Total: 7

    11. a) 6 marks, advantages and disadvantages of Aspen wood cloning:
    ads: supported structure
    dis: a genetic illness could affect all organisms, all are male so cannot reproduce with a female [6]

    b) Plant cells continue to have the ability to differentiate (become other cells) as the plant ages, whereas animal cells lose this ability [1]

    c) ads: more accurate
    dis: requires killing the organism, wet mass fluctuates is an alternative [2]

    Total: 9

    12. a) the amount of oxygen needed to oxidise the amount of lactic acid which has built up [1]

    b) The amount of oxygen which is needed will be the same as the amount taken in - the oxygen taken in is needed to replace the oxygen debt [1]

    c) Lactic acid. It steeply increases during exercise because of anaerobic respiration and then gradually decreases after when it's broken down by the liver, until none is left. [2]

    Total: 4

    13. a) The number x 3 because there are 3 bases coded for 1 amino acid [1]

    b) The amino acids are different because the genes coding for these proteins each have a different order of bases [1]

    c) The DNA unzips, allowing free nucleotides to attach to each strand and form 2 new DNA molecules. A-T and C-G. [3]

    Total: 5
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    Thanks so much!!!
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    Thanks what a great scheme! Only thing is the drug trial wasn't blind as in that case the test subjects aren't told what they're getting.
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    Thank you
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    What do you think the grade boundary will be to get an A*?
    (Original post by Naomi265)
    Please comment if you think these are wrong/you know some questions I missed etc.

    1. a) A=iris, controls the amount of light entering the eye
    B=retina, where the image is focused, detects the light rays [2]

    b) cornea, lens [2]

    c) They each receive different alleles from the parents so their phenotypes are different from having different recessive/dominant alleles [possibly 2]

    d) The 2 eyes see images which overlap and the brain compares the two to judge distance - seeing how similar/different the images are [2]

    Total: 8

    2. a) auxins [1]

    b) Charlotte - the roots are growing towards gravity so are positvely geotrophic [2]

    Total: 3

    3. a) 33g [1]

    b) She also needs protein for the growing foetus - her EAR would increase [1]

    a) f f (mother) F f (father) = 50% [2]

    b) f f (mother) F f (father) = 50% [2]

    Total: 6

    4. a) stimulant because increasing the amount of neurotransmitters [2]

    b) 6 mark - describe the graph and explain why a blind trial is used eg reduces psychological effects, fairer test, accurately see if the drug has any effect [6]

    Total: 8

    5. a) The tigers have a lack of habitats so fewer reliable food sources, possible mating partners etc. [3]

    b) As the numbers of predator increase, the numbers of prey decrease. There is cyclical fluctuation - the predators and prey have similar graphs but a time difference. [2]

    Total: 5

    6. a) Phylum, Order, Genus [3]

    b) They evolve with different gene pools and eventually their DNA becomes so different they are considered different species [2]

    Total: 5

    7. a) they compete with other organisms eg. bees for the nectar [1]

    b) Their habitat and role in that habitat - they both play the same role of feeding on the nectar in their habitat [1]

    c) They have evolved to feed from oak trees instead of bushes so have different mouth parts to allow them to do this [1]

    Total: 3

    8. a) 1940-1980 [1]

    b)

    c) The gradient of the line - there will probably be a range for this as the graph was a little ambiguous so 0.5-0.7/80 = 0.00625-0.00875 [2]

    d) With a hugely increasing population, it will become harder to think about the future when developing because there will be more people now to consider or something like that [2]

    Total:

    9. The controversial 6 mark - 2 or 5%? (I put 2). The energy is lost by egestion, excretion and respiration. There is not enough energy left for another trophic level because the efficiency is so low - most of the energy at each stage is used for things other than growth. [6]

    Total: 6

    10. a) D because it has a thicker wall to allow for higher pressure blood to travel to the body and is the mirror image of a normal heart [2]

    b) I'm not sure [how is the transplant surgery different]- I put the vessels eg. vena cava would be on the opposite side to normal [2]

    c) 6300 [1]

    d) ad: the doctors need to know if someone has it to carry out treatments, quite a few people are affected by it,

    dis: not that many people are affected by it, could be expensive, could cause harm to the foetus, parents may disagree [2]

    Total: 7

    11. a) 6 marks, advantages and disadvantages of Aspen wood cloning:
    ads: every organism is genetically identical so know characteristics, supported structure
    dis: a genetic illness could affect all organisms, all are male so cannot reproduce with a female [6]

    b)

    c) ads: more accurate
    dis: requires killing the organism [2]

    Total:

    12. a) the amount of oxygen needed to oxidise the amount of lactic acid which has built up [1]

    b) The amount of oxygen which is needed will be the same as the amount taken in - the oxygen taken in is needed to replace the oxygen debt [1]

    c) Lactic acid. It steeply increases during exercise because of anaerobic respiration and then gradually decreases after when it's broken down by the liver, until none is left. [2]

    Total: 4

    13. a) The number x 3 because there are 3 bases coded for 1 amino acid [1]

    b)

    c) The DNA unzips, allowing free nucleotides to attach to each strand and form 2 new DNA molecules. A-T and C-G. [2]

    Total: 5
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    Thank you!
    I think you missed out some questions on sustainable development at the end and why it would be difficult to carry it out with such a big population

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    (Original post by onenation)
    Thanks what a great scheme! Only thing is the drug trial wasn't blind as in that case the test subjects aren't told what they're getting.
    Okay, will update
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    The last question was worth 3 marks not 2 x
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    (Original post by AA11AAA)
    What do you think the grade boundary will be to get an A*?
    I have no idea tbh, some people I have talked to found the paper hard and some really easy. It's normally around 50-55 so probably somewhere around there.
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    (Original post by Naomi265)
    Please comment if you think these are wrong/you know some questions I missed etc.

    1. a) A=iris, controls the amount of light entering the eye
    B=retina, where the image is focused, detects the light rays [2]

    b) cornea, lens [2]

    c) They each receive different alleles from the parents so their phenotypes are different from having different recessive/dominant alleles [possibly 2]

    d) The 2 eyes see images which overlap and the brain compares the two to judge distance - seeing how similar/different the images are [2]

    Total: 8

    2. a) auxins [1]

    b) Charlotte - the roots are growing towards gravity so are positvely geotrophic [2]

    Total: 3

    3. a) 33g [1]

    b) She also needs protein for the growing foetus - her EAR would increase [1]

    a) f f (mother) F f (father) = 50% [2]

    b) f f (mother) F f (father) = 50% [2]

    Total: 6

    4. a) stimulant because increasing the amount of neurotransmitters [2]

    b) 6 mark - describe the graph and explain why a placebo is used eg reduces psychological effects, fairer test, accurately see if the drug has any effect [6]

    Total: 8

    5. a) The tigers have a lack of habitats so fewer reliable food sources, possible mating partners etc. [3]

    b) As the numbers of predator increase, the numbers of prey decrease. There is cyclical fluctuation - the predators and prey have similar graphs but a time difference. [2]

    Total: 5

    6. a) Phylum, Order, Genus [3]

    b) They evolve with different gene pools and eventually their DNA becomes so different they are considered different species [2]

    Total: 5

    7. a) they compete with other organisms eg. bees for the nectar [1]

    b) Their habitat and role in that habitat - they both play the same role of feeding on the nectar in their habitat [1]

    c) They have evolved to feed from oak trees instead of bushes so have different mouth parts to allow them to do this [1]

    Total: 3

    8. a) 1940-1980 [1]

    b)

    c) The gradient of the line - there will probably be a range for this as the graph was a little ambiguous so 0.5-0.7/80 = 0.00625-0.00875 [2]

    d) With a hugely increasing population, it will become harder to think about the future when developing because there will be more people now to consider or something like that [2]

    Total:

    9. The controversial 6 mark - 2 or 5%? (I put 2). The energy is lost by egestion, excretion and respiration. There is not enough energy left for another trophic level because the efficiency is so low - most of the energy at each stage is used for things other than growth. [6]

    Total: 6

    10. a) D because it has a thicker wall to allow for higher pressure blood to travel to the body and is the mirror image of a normal heart [2]

    b) I'm not sure [how is the transplant surgery different]- I put the vessels eg. vena cava would be on the opposite side to normal [2]

    c) 6300 [1]

    d) ad: the doctors need to know if someone has it to carry out treatments, quite a few people are affected by it,

    dis: not that many people are affected by it, could be expensive, could cause harm to the foetus, parents may disagree [2]

    Total: 7

    11. a) 6 marks, advantages and disadvantages of Aspen wood cloning:
    ads: every organism is genetically identical so know characteristics, supported structure
    dis: a genetic illness could affect all organisms, all are male so cannot reproduce with a female [6]

    b)

    c) ads: more accurate
    dis: requires killing the organism [2]

    Total:

    12. a) the amount of oxygen needed to oxidise the amount of lactic acid which has built up [1]

    b) The amount of oxygen which is needed will be the same as the amount taken in - the oxygen taken in is needed to replace the oxygen debt [1]

    c) Lactic acid. It steeply increases during exercise because of anaerobic respiration and then gradually decreases after when it's broken down by the liver, until none is left. [2]

    Total: 4

    13. a) The number x 3 because there are 3 bases coded for 1 amino acid [1]

    b)

    c) The DNA unzips, allowing free nucleotides to attach to each strand and form 2 new DNA molecules. A-T and C-G. [3]

    Total: 6
    thank you!!
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    Cheers for this. Relieved me tbh
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    (Original post by Naomi265)
    Please comment if you think these are wrong/you know some questions I missed etc.

    1. a) A=iris, controls the amount of light entering the eye
    B=retina, where the image is focused, detects the light rays [2]

    b) cornea, lens [2]

    c) They each receive different alleles from the parents so their phenotypes are different from having different recessive/dominant alleles [possibly 2]

    d) The 2 eyes see images which overlap and the brain compares the two to judge distance - seeing how similar/different the images are [2]

    Total: 8

    2. a) auxins [1]

    b) Charlotte - the roots are growing towards gravity so are positvely geotrophic [2]

    Total: 3

    3. a) 33g [1]

    b) She also needs protein for the growing foetus - her EAR would increase [1]

    a) f f (mother) F f (father) = 50% [2]

    b) f f (mother) F f (father) = 50% [2]

    Total: 6

    4. a) stimulant because increasing the amount of neurotransmitters [2]

    b) 6 mark - describe the graph and explain why a placebo is used eg reduces psychological effects, fairer test, accurately see if the drug has any effect [6]

    Total: 8

    5. a) The tigers have a lack of habitats so fewer reliable food sources, possible mating partners etc. [3]

    b) As the numbers of predator increase, the numbers of prey decrease. There is cyclical fluctuation - the predators and prey have similar graphs but a time difference. [2]

    Total: 5

    6. a) Phylum, Order, Genus [3]

    b) They evolve with different gene pools and eventually their DNA becomes so different they are considered different species [2]

    Total: 5

    7. a) they compete with other organisms eg. bees for the nectar [1]

    b) Their habitat and role in that habitat - they both play the same role of feeding on the nectar in their habitat [1]

    c) They have evolved to feed from oak trees instead of bushes so have different mouth parts to allow them to do this [1]

    Total: 3

    8. a) 1940-1980 [1]

    b)

    c) The gradient of the line - there will probably be a range for this as the graph was a little ambiguous so 0.5-0.7/80 = 0.00625-0.00875 [2]

    d) With a hugely increasing population, it will become harder to think about the future when developing because there will be more people now to consider or something like that [2]

    Total:

    9. The controversial 6 mark - 2 or 5%? (I put 2). The energy is lost by egestion, excretion and respiration. There is not enough energy left for another trophic level because the efficiency is so low - most of the energy at each stage is used for things other than growth. [6]

    Total: 6

    10. a) D because it has a thicker wall to allow for higher pressure blood to travel to the body and is the mirror image of a normal heart [2]

    b) I'm not sure [how is the transplant surgery different]- I put the vessels eg. vena cava would be on the opposite side to normal [2]

    c) 6300 [1]

    d) ad: the doctors need to know if someone has it to carry out treatments, quite a few people are affected by it,

    dis: not that many people are affected by it, could be expensive, could cause harm to the foetus, parents may disagree [2]

    Total: 7

    11. a) 6 marks, advantages and disadvantages of Aspen wood cloning:
    ads: every organism is genetically identical so know characteristics, supported structure
    dis: a genetic illness could affect all organisms, all are male so cannot reproduce with a female [6]

    b)

    c) ads: more accurate
    dis: requires killing the organism [2]

    Total:

    12. a) the amount of oxygen needed to oxidise the amount of lactic acid which has built up [1]

    b) The amount of oxygen which is needed will be the same as the amount taken in - the oxygen taken in is needed to replace the oxygen debt [1]

    c) Lactic acid. It steeply increases during exercise because of anaerobic respiration and then gradually decreases after when it's broken down by the liver, until none is left. [2]

    Total: 4

    13. a) The number x 3 because there are 3 bases coded for 1 amino acid [1]

    b)

    c) The DNA unzips, allowing free nucleotides to attach to each strand and form 2 new DNA molecules. A-T and C-G. [3]

    Total: 6
    11b: Why is it easier to clone plants than animals
    A: Because plants can reproduce asexually?
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    (Original post by OllieBiggs)
    11b: Why is it easier to clone plants than animals
    A: Because plants can reproduce asexually?
    I put because plant cells retain the ability to differentiate ? And I don't think it was question 11 it was much earlier on ?
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    (Original post by OllieBiggs)
    11b: Why is it easier to clone plants than animals
    A: Because plants can reproduce asexually?
    I put because plants can keep the ability for their cells to differentiate whereas animals lose it quite early on??
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    (Original post by OllieBiggs)
    11b: Why is it easier to clone plants than animals
    A: Because plants can reproduce asexually?
    Yess, thank you. However I think it's to do with it being more ethical and raising fewer moral questions?
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    (Original post by OllieBiggs)
    11b: Why is it easier to clone plants than animals
    A: Because plants can reproduce asexually?
    I think I wrote something like plants retain the ability to differentiate, whereas animals lose this at a young age.
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    Would you still get the full marks if you say that the plant can differentiate
    (Original post by GCShElpme)
    I think I wrote something like plants retain the ability to differentiate, whereas animals lose this at a young age.
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    (Original post by GCShElpme)
    I think I wrote something like plants retain the ability to differentiate, whereas animals lose this at a young age.
    Oh fair enough
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    how many marks was 11b?
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    (Original post by AA11AAA)
    Would you still get the full marks if you say that the plant can differentiate
    I think you'd have to specify that animal cells lose this in order to get full marks- but you might get one!
 
 
 

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