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प्रश्न
Why do we boil the leaf in alcohol when we are testing it for starch?
उत्तर
We boil the leaf in alcohol when we are testing it for starch to remove the chlorophyll from it and decolourise it.
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संबंधित प्रश्न
(a) Name the pigment in leaves which absorbs sunlight energy.
(b) What is the colour of this pigment?
what is chlorophyll? What part does chlorophyll play in photosynthesis?
Which simple food is prepared first in the process of photosynthesis?
The process in plants which converts light energy into chemical energy.
When carrying out the starch test on a leaf, why is it important to boil the leaf in alcohol?
(a) to dissolve the waxy cuticle
(b) to make the cells more permeable to iodine solution
(c) to remove the chlorophyll
(d) to stop chemical reactions in the cells.
The opening and closing of the stomatal pores depends upon:
(a) oxygen
(b) water in guard cells
(c) temperature
(d) concentration of CO2 in stomata
Water absorption through roots can be increased by keeping the potted plants:
(a) in the shade
(b) in dim light
(c) under the fan
(d) covered with a polythene bag
Why is plant food not produced in any other parts of the plant except the green ones?
Opening and closing of stomatal pore depends on ______.
Oxygen liberated during photosynthesis comes from
