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  1. S

    Biology Paper 22 Discussion thread.

    No no I mean the breathing difficulty one
  2. S

    Biology - teeth

    But antibiotics are made by the fermentation of the nutrient broth :s they aren't MADE or PRODUCED by the batch system...that's how they're extracted. Lol tho I wrote microtechnology..just google it :p :/ but the question was so vague, and fermenter was mentioned in the question....it couldn't...
  3. S

    Biology - teeth

    No no or it was fermentation. It's definition in terms of biotechnology is different. Biotechnology isn't a process isn't a process so it couldn't be the answer. For the thorax infection, did anyone mention mucus, or was it merely the damage to the alveoli and inability of the organs to move...
  4. S

    Biology - teeth

    The answer was fermentation btw. I wrote it at first, crossed it and wrote excretion, crossed that and ended up writing microtechnology x_x btw the diagram which they gave us was of the surface view of the guard cells...just saying
  5. S

    Biology - teeth

    I wrote and did the exact same thing u did! How we're we supposed to draw the surface view of the guard cells?
  6. S

    Biology Paper 22 Discussion thread.

    What was the answer to the question about the thoracic infection?
  7. S

    Biology Paper 22 Discussion thread.

    Same. The ph and temperature of the soil maintained by a computer interface, water availability ensured, right amount of fertilisers and pesticides added, amount of air/oxygen entering is controlled etc etc...I even wrote about crop rotatation. What I meant was that a part of the soil should be...
  8. S

    Biology; Chemistry; Physics: Post your doubts here!

    But according to one of the examiners report, we have to be very specific in our answers. We can't write answers such as for cooking or something, when its used specially in furnaces :S so how would we know that? I mean I know magnesium oxide is an ionic compound and thus has a high melting...
  9. S

    Biology Paper 22 Discussion thread.

    What'd u guys write in the greenhouse question? Conditions for maximum crop production?
  10. S

    Biology; Chemistry; Physics: Post your doubts here!

    Are the uses of other substances given as well?
  11. S

    Biology; Chemistry; Physics: Post your doubts here!

    Oh it's not given in red-spot. How do u know all this btw? Do u go to merchant??
  12. S

    Biology; Chemistry; Physics: Post your doubts here!

    No they didn't give any unit. They gave us the mass of something in 2 dm3 of a solvent and asked us to find its concentration :S Magnesium is used in furnaces as a refractory material, and then there's silicon
  13. S

    Biology; Chemistry; Physics: Post your doubts here!

    How did u know that? The same goes for magnesium oxide...the questions don't give away the answer :/ Also, when we have to find the concentration of something, can we give it in terms of g/dm3? Or is always mol/dm3? Like in q6 in the December 2003 exam
  14. S

    Biology; Chemistry; Physics: Post your doubts here!

    In one of the past papers, they asked us the use of acetylene :/ are there other hydrocarbons outside our syllabus whose uses we should know?
  15. S

    Biology; Chemistry; Physics: Post your doubts here!

    What happens in centrifuging? The insoluble solute forms a suspension in the solid and sinks to the bottom very slowly, but how does that separate it from the mixture? Also, how do u make soluble and insoluble salts? Could soneone tell me ONE detailed method of each?
  16. S

    Biology; Chemistry; Physics: Post your doubts here!

    Draw two lines 5 cm each. Then make two 5 cm arcs by placing the compass at either end. The two arcs will intersect. Join their intersection point to the origin. The resultant velocity will be at a 45' angle from both the forces
  17. S

    Biology; Chemistry; Physics: Post your doubts here!

    For separating soluble salts, when do we use evaporation to dryness and when, crystallisation? Is sodium chloride the only salt that we evaporate to dryness? And if so why? Doesn't it have water of crystallisation :s
  18. S

    Bio theory 22

    Question 3 or three of the questions? My question 5 and 6 were messed up
  19. S

    Bio theory 22

    What? Was part of your answer given in the question? :/ I used a much broader term...it's the chapters name on the book by Lemp pang
  20. S

    Bio theory 22

    Agreed. I still don't get that one word process question :/
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