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Recent content by usef shahin

  1. usef shahin

    A level Biology: Post your doubts here!

    macrophages detect and carries out phagocytosis on the pathogen , it then displays its remains on an APC molecule as an antigen, when the T Helper cells binds to it , T helper cell gets activated and releases cytokinin which furthermore brings about the activation of B cells causing them to...
  2. usef shahin

    bio nerd overload 9999

    bio nerd overload 9999
  3. usef shahin

    A level Biology: Post your doubts here!

    they showed in the graph that the concentration of glucose outside the cell will keep increasing and the if it does then glucose will keep entering the cell , and because of that the concentration of glucose will never be equal (as it is increasing outside the cell) , hence if I think of it from...
  4. usef shahin

    i like them thou :D dont mind if i steel some of ur quotes and post them on my fb .... wait ...

    i like them thou :D dont mind if i steel some of ur quotes and post them on my fb .... wait ... i dont have fb :')
  5. usef shahin

    i cannot deny thy words and its up to u , if u r a positive person then take it as a complement...

    i cannot deny thy words and its up to u , if u r a positive person then take it as a complement but dont say "our" cause so far ur profile is the MOST emotional one ive seen , like ... yes other people do too but u r doing it in excess
  6. usef shahin

    ur profile posts are so deep , i came here to get knowlege not cry :')

    ur profile posts are so deep , i came here to get knowlege not cry :')
  7. usef shahin

    my memories pass out as urine and shit cuz i will never forget the good food i ate throughout my...

    my memories pass out as urine and shit cuz i will never forget the good food i ate throughout my life :')
  8. usef shahin

    A level Biology: Post your doubts here!

    got em ;) , u r such a genius MaShaaAllah :p
  9. usef shahin

    i waz just trynna be like teh cool kidz out dere :')

    i waz just trynna be like teh cool kidz out dere :')
  10. usef shahin

    A level Biology: Post your doubts here!

    somehow longer than urs but make sure to like something other than the structure only to make the examiner more interested and make the answer more fluid :) btw , i dont know how many points i noted there cuz i wrote wat i know not from the markscheme NOTE : u can add some tiny info from A2...
  11. usef shahin

    A level Biology: Post your doubts here!

    Here is a sample of how i write my answer : Chloroplast is a organelle that is found inside plant cells only ,with a diameter of 4-10 micrometer. it has bimembranes , inner and outer membranes from which light passes through, it then has to pass through the stroma which is the cytoplasm of the...
  12. usef shahin

    playing a very popular game called "LIFE"

    playing a very popular game called "LIFE"
  13. usef shahin

    A level Biology: Post your doubts here!

    i would like to point out that for such large questions try to use better english , atleast better disriptive english grammar and my teacher always said me to link the points with each other (with the super duper moper enlish -.-) its annoying yes but if i showed your answer to my teacher he...
  14. usef shahin

    A level Biology: Post your doubts here!

    A small tip i would like to hand out which is for such questions that relate to binding sites (enzymes questions as well) mention that the shape is SPECIFIC and also say that its COMPLEMENTARY, because sometimes they might reject either specific and accept the term complementary or vice versa ...
  15. usef shahin

    A level Biology: Post your doubts here!

    This question requires a bit of a 3 min time to think it anywho :p , B is not true cuz the sucrose will diffuse outside the cell due to the concenteration difference AND less solute means less negative not more negative C is false as well cuz water will move inside the cell due to the potential...
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