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

26 comments:

kadine 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.

Kshitiz Agrawal 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.

radha krishnan 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.

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Hong Wan Jing said...

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

FlamingBaws said...

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

nothando face moyo 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!!

Robin Nair said...

thanks excellent

noushad dana said...
This comment has been removed by the author.
noushad dana said...

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

Rajay Harvey said...

thanks this help me alot

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