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A level Biology: Post your doubts here!

Discussion in 'International A And AS Level' started by XPFMember, Sep 29, 2011.

  1. Kanekii

    Kanekii

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    Trachea- C shaped windpipe with cartillage
    Bronchus-Structures with smooth muscles and some cartillage
    Bronchiole-Does not contain cartillage and smooth muscle
    Alveoli- Greater surface area for gaseous exchange, contains elastic fibres and collagen. Elastic fibres stretch to allow greater diffusion of gases
     
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  3. Sammy1234

    Sammy1234

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    For the question about Nicotine and when a person stops smoking what are the effects on the CV system - is decrease in Heart rate and decrease in blood pressure right?
     
  4. Sammy1234

    Sammy1234

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    I also put decreases the risk of Thrombosis.
     
  5. M.@(-)M@D $0(-)@!L

    [email protected](-)[email protected] $0(-)@!L

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    I wrote nuclear envelope and Golgi body? Is it correct??
     
  6. Sammy1234

    Sammy1234

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  7. M.@(-)M@D $0(-)@!L

    [email protected](-)[email protected] $0(-)@!L

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    yep all 3 are correct.
     
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  8. Sammy1234

    Sammy1234

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    What did u guys put for the properties of H2O that allow for apoplastic movement?
     
  9. Kanekii

    Kanekii

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    Also higher breathing rate and greater partial pressure of oxygen required for the same percentage haemoglobin saturation of the person who smoked joints.
     
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  10. Kanekii

    Kanekii

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    Water molecules attraced to each other
    -cohestion between water molecules
    -Adhesion to the cellulose cell wall
    -For intercellular air spaces high latent heat of vapourisation
     
  11. Kanekii

    Kanekii

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    What were the advantages/use of monoclonal antibodies?
     
  12. {#}324354

    {#}324354

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    What did you write for that Mico mRNA thing?? They mentioned start codon as well within the question.
     
  13. Sammy1234

    Sammy1234

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    Nice, that's what I put.
     
  14. angryrider_56

    angryrider_56

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    i
    wrote RER and Ribosomes but one of my friends said that i had to write 80S ribosomes because prokaryotes also have ribosomes so am not sure about that.....and btw plant cells have golgi apparatus?
     
  15. Sammy1234

    Sammy1234

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    Translation does not occur as START codon is not initiated.
    Proteins are not made .

    But i'm not sure
     
  16. Kanekii

    Kanekii

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    Sadly that question of mine got left out didnt have time to complete it
     
  17. angryrider_56

    angryrider_56

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    and guys....out of stress i missed up between adhesion and cohesion like i explained cohesion as if it was adhesion and explained adhesion as if it was cohesion.....how many marks will i lose :'(
     
  18. Sammy1234

    Sammy1234

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    yes plants cells have golgi
     
  19. Sammy1234

    Sammy1234

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    It was 3 marks right?
    Probably 1 mark, as long as you mentioned water has a high latent heat of vaporisation and another property.
     
  20. {#}324354

    {#}324354

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    Isn't it that protein is made but the protein produced is different from the one that carries normal activity hence mechanism initiated. But I'm not quite sure of my answer either.
     
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  21. Sammy1234

    Sammy1234

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    I'm not sure, I just put produce a large quantity of antibodies that are specific to an antigen.
     

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