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  1. Karim Nabil

    A level Biology: Post your doubts here!

    q15> 1*60=60sec; 60+33+.54=93.54> 93.54 is not an accurate value so round it to 94 sec, answer is C q21> it asked the combination of gene activity that is most likely to result in breast cancer, so the 3 genes must mutate to produce abnormal or no protein , therefore mutation results in cancer...
  2. Karim Nabil

    A level Biology: Post your doubts here!

    my pleasure!
  3. Karim Nabil

    A level Biology: Post your doubts here!

    light microscope can't measure values less than 200nm so in q 1 in first link, first 2 options aren't correct and option D also as ribosomes is measured by nm not um so answer is C q1 in 2nd link, width of cell walls in nm while diameter of wbc and alveolus is measured in um, answer is C
  4. Karim Nabil

    A level Biology: Post your doubts here!

    humoral response> antigens is in the tissue fluid not inside the cells nucleus(10um)> chloroplast(5um)> mitochondria(2.5um)> ribosomes> 22nm if any organelle not listed here just tell me about it
  5. Karim Nabil

    yes, hope so.. overall, it was an easy paper... WBU ? to write a comment in a style sheet: --...

    yes, hope so.. overall, it was an easy paper... WBU ? to write a comment in a style sheet: -- your comment
  6. Karim Nabil

    A level Biology: Post your doubts here!

    q14> there is competitive inhibitor so increasing the concentration of substrate increase the probability of substrate to form E-S complex because more no. of substrate is competing with the fixed no. of competitive inhibitor, answer is C q15> 1*60=60sec; 60+33+.54=93.54> 93.54 is not an...
  7. Karim Nabil

    A level Biology: Post your doubts here!

    you're most welcome!
  8. Karim Nabil

    A level Biology: Post your doubts here!

    p> atrial systole> when both atria contracts q-s> ventricular systole> when both ventricles contract t> ventricular diastole> when both ventricles relax to be filled with blood in the qp he asks flow of current through atria and recovery of ventricular walls flow of current through atria means...
  9. Karim Nabil

    A level Biology: Post your doubts here!

    my pleasure :D q22> DNA double strand structure consists of sense strand that carries all info. in a DNA and anti-sense strand that is complementary only to the sense strand to stabilise the DNA molecule so 700/2=350 as only one strand is carrying info. 350*3=1050 as we assume that DNA molecule...
  10. Karim Nabil

    Iɴғᴏʀᴍᴀᴛɪᴏɴ ᴀɴᴅ Cᴏᴍᴍᴜɴɪᴄᴀᴛɪᴏɴ Tᴇᴄʜɴᴏʟᴏɢʏ (0417) : Pᴏsᴛ ʏᴏᴜʀ ᴅᴏᴜʙᴛs ʜᴇʀᴇ! ᴴᴰ

    yes, he would end up degraded :P
  11. Karim Nabil

    so if you would try imagination, everything will be better for you rather than knowledge which...

    so if you would try imagination, everything will be better for you rather than knowledge which is always limited.
  12. Karim Nabil

    -Imagination is better than knowledge-

    -Imagination is better than knowledge-
  13. Karim Nabil

    yes, although i entered in a dizzy mode :P

    yes, although i entered in a dizzy mode :P
  14. Karim Nabil

    Biology; Chemistry; Physics: Post your doubts here!

    hhh, you're most welcome
  15. Karim Nabil

    Biology; Chemistry; Physics: Post your doubts here!

    i agree you give that man a cookie :P
  16. Karim Nabil

    Biology; Chemistry; Physics: Post your doubts here!

    i only see arrows where is specificity people -_- !
  17. Karim Nabil

    Biology; Chemistry; Physics: Post your doubts here!

    the examiner who creates this question is a retard!
  18. Karim Nabil

    Iɴғᴏʀᴍᴀᴛɪᴏɴ ᴀɴᴅ Cᴏᴍᴍᴜɴɪᴄᴀᴛɪᴏɴ Tᴇᴄʜɴᴏʟᴏɢʏ (0417) : Pᴏsᴛ ʏᴏᴜʀ ᴅᴏᴜʙᴛs ʜᴇʀᴇ! ᴴᴰ

    hhhhh, give it a try!
  19. Karim Nabil

    mmmm... maybe i guess i may lose some marks but not more than 5 :P

    mmmm... maybe i guess i may lose some marks but not more than 5 :P
  20. Karim Nabil

    Iɴғᴏʀᴍᴀᴛɪᴏɴ ᴀɴᴅ Cᴏᴍᴍᴜɴɪᴄᴀᴛɪᴏɴ Tᴇᴄʜɴᴏʟᴏɢʏ (0417) : Pᴏsᴛ ʏᴏᴜʀ ᴅᴏᴜʙᴛs ʜᴇʀᴇ! ᴴᴰ

    it will be already there BRO, if not then click on the graph , then layout, then legend no, unless you are into a social website like facebook, youtube,etc.. otherwise, you can use it for any words you didn't understand!
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