Friday, May 15, 2009

STEPS TO TEST PRESENCE OF STARCH IN THE LEAF

1. Boil pieces of leaves in a beaker of water TO KILL THE CELLS AND BREAK THE WALL OF LEAF CELL



Fresh leaves







Boiling the leaves


2. Heat the pieces of leaf in alcohol for few minutes TO REMOVE CHLOROPHYLL




Alcohol turns to green color- chlorophyll is removed



3. Soak the pieces of leaf in hot water for a little while TO SOFTEN THE LEAF




4. Using a dropper, add a few drops of iodine solution onto the pieces of leaf TO TEST FOR STARCH








STUDENTS OBSERVING THE LEAVES



LEAVES THAT CONTAINS STARCH TURN TO DARK BLUE COLOUR

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33 comments:

  1. kadysashNovember 24, 2009 at 8:06 AM

    this is very interesting

    ReplyDelete
    Replies
    1. UnknownFebruary 19, 2020 at 10:19 PM

      What colour was the leaf when you remove it from the boiling water?

      Delete
  2. SohamSeptember 14, 2011 at 7:45 PM

    Soham Parundekar
    Useful information. I used this for the preparation of NSTSE

    ReplyDelete
  3. AnonymousOctober 13, 2011 at 9:18 PM

    It sucks -.-

    ReplyDelete
  4. AnonymousMay 8, 2012 at 7:11 PM

    what the point about it i would like to kmow

    ReplyDelete
  5. arzeliz dyrene herreraSeptember 11, 2012 at 6:53 PM

    Thank you berry much :DD
    -Mendelians

    ReplyDelete
  6. jeremiah de leonSeptember 11, 2012 at 6:55 PM

    putang ina. hirap kac nag assignment sa subject na yon e. pucha

    ReplyDelete
  7. Francheska Lois Elvina-PagubayanSeptember 11, 2012 at 6:56 PM

    thankyoupo

    ReplyDelete
  8. AnonymousSeptember 17, 2012 at 9:13 PM

    fucking shite

    ReplyDelete
  9. AnonymousMarch 6, 2013 at 3:09 AM

    Thank you,
    This helped a lot.

    ReplyDelete
  10. UnknownMay 20, 2014 at 7:26 PM

    The activity is very interesting but you should write the materials required.

    ReplyDelete
  11. AnonymousSeptember 28, 2014 at 7:29 PM

    Do not use Capital letters

    ReplyDelete
  12. AnonymousMarch 13, 2015 at 3:01 PM

    stop putting negative comments if you can't do better than this presentation.

    ReplyDelete
  13. UnknownJune 15, 2015 at 7:44 PM

    IT'S SO INFORMATIVE.NICE&INTRESTING .THANK U

    ReplyDelete
  14. AnonymousJuly 15, 2015 at 2:21 AM

    oh radha what r u like
    cheeky fella

    ReplyDelete
  15. AnonymousAugust 7, 2015 at 2:28 AM

    Thank you for your steps.

    ReplyDelete
  16. wjSeptember 20, 2015 at 10:00 PM

    Hello :) Thanks for going through the steps of the experiment and the reasons behind the steps :D It really helped me :)

    ReplyDelete
  17. UnknownDecember 4, 2015 at 1:42 AM

    This was quite useful. Thx i just mannaged to do my homework.

    ReplyDelete
  18. UnknownFebruary 16, 2016 at 3:45 AM

    thank you so much its so interesting l had a problem wth these steps
    but l juss 4und e solution

    ReplyDelete
  19. AnonymousMay 4, 2016 at 12:29 AM

    Helped me. Thx!!

    ReplyDelete
  20. UnknownOctober 20, 2016 at 9:47 AM

    thanks excellent

    ReplyDelete
  21. UnknownApril 18, 2017 at 11:00 PM

    This comment has been removed by the author.

    ReplyDelete
  22. UnknownApril 18, 2017 at 11:01 PM

    Thanx !4 helping me , without ur help I couldn't have done my homework.

    ReplyDelete
  23. UnknownJune 16, 2017 at 11:32 AM

    thanks this help me alot

    ReplyDelete
  24. AnonymousMarch 5, 2018 at 3:11 AM

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    ReplyDelete
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  26. UnknownMarch 15, 2019 at 1:29 PM

    Thanks a lot.Now I know the procedures to take to perform this experiment.The one we did in the school did not change colour

    ReplyDelete
  27. UnknownAugust 2, 2019 at 11:52 PM

    Thanks very much.

    ReplyDelete
  28. UnknownAugust 30, 2019 at 4:07 AM

    I love the procedure

    ReplyDelete
  29. Feature surgeonMarch 17, 2020 at 6:15 PM

    Interesting

    ReplyDelete
  30. AnonymousJune 2, 2020 at 12:08 AM

    Doesnt fucking help

    ReplyDelete