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    (Original post by DJShaji)
    eugh I wrote use water instead of alcohol to show that catalase does infact work with hydrogen peroxide
    It is correct too!
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    (Original post by Kai Sun)
    Yeah, I reckon you are right.
    This is what I did -_-
    http://prnt.sc/b0cjt0
    Hey you made it correct! I also made it in same manner
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    (Original post by examhater44)
    How many marks was the delivery tube one?
    I think it was 1 mark but just clarify if I'm wrong

    I got magnification to be 1.59, that's a valid answer right?
    I think it was 1 mark only.
    The magnification should be fine, a bit on the small side but valid.
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    Mohammad imtiaz


    That's a relief, coz it was worth like 4-5 marks
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    (Original post by Kai Sun)
    I think it was 1 mark only.
    The magnification should be fine, a bit on the small side but valid.
    Yeah, many people said anything bigger than 1x should be fine
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    (Original post by Kai Sun)
    Mohammad imtiaz


    That's a relief, coz it was worth like 4-5 marks
    Ya it was of 5 marks btw what you wrote in the last question about xylem vessel where we uad to use a red dye which worth 4 marks
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    (Original post by Mohammad imtiaz)
    Ya it was of 5 marks btw what you wrote in the last question about xylem vessel where we uad to use a red dye which worth 4 marks
    . The plant is placed in a bath of water with red dye
    . Transpiration pull brings the water through xylem in a dry, warm room
    . The red dye stains the xylem walls
    . The stem of the plant is laterally cut open revealing the vascular bundle
    . Vascular bundle is examined under a light microscope, revealing the stained xylem tube.

    I think this is enough for full marks.
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    Well well that paper 4 today was a shocker. More like a geography paper tbh. And what was all that with fish farming. Actually hilarious.
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    Lol everything related to this is written in chapter ecosystem and luckily,I read that chapter with full concentration and I hope I would get A*.In my opinion paper was easy except first question
 
 
 
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