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

33 comments:

kadysash said...

this is very interesting

Soham said...

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

Anonymous said...

It sucks -.-

Anonymous said...

what the point about it i would like to kmow

arzeliz dyrene herrera said...

Thank you berry much :DD
-Mendelians

jeremiah de leon said...

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

Francheska Lois Elvina-Pagubayan said...

thankyoupo

Anonymous said...

fucking shite

Anonymous said...

Thank you,
This helped a lot.

Unknown said...

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

Anonymous said...

Do not use Capital letters

Anonymous said...

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

Unknown said...

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

Anonymous said...

oh radha what r u like
cheeky fella

Anonymous said...

Thank you for your steps.

wj said...

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

Unknown said...

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

Unknown said...

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

Anonymous said...

Helped me. Thx!!

Unknown said...

thanks excellent

Unknown said...
This comment has been removed by the author.
Unknown said...

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

Unknown said...

thanks this help me alot

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Unknown said...

That'sno problem it's my job🍃🍂🍂🍃😀

Unknown said...

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

Unknown said...

Thanks very much.

Unknown said...

I love the procedure

Unknown said...

Thank u

Unknown said...

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

Feature surgeon said...

Interesting

Anonymous said...

Doesnt fucking help