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प्रश्न
Give reasons/explain:
During the starch test, the leaf is boiled in methylated spirit.
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उत्तर
Boiling the leaf in methylated spirit removes chlorophyll, therefore it turns pale-white. The leaf is now brittle and stiff.
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संबंधित प्रश्न
Complete the following statement by choosing the correct alternative given below :
All animals would die on the earth if there was no ______.
The chemical substance used to test the presence of starch in the cell of a leaf is ______.
Given alongside is the diagram of an experimental set-up:
Will it work satisfactorily? Given reason.
Given alongside is the diagram of an experimental set-up:
What alteration (s) will you make in it for obtaining expected result?
A potted plant was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours. One of the leaves was covered with black paper in the centre. The potted plant was then placed in sunlight for a few hours.
Draw a neat diagram of a chloroplast and label its parts.
Where are the chlorophyll pigments present in a cell?
ATP is needed for the dark reaction.
Differentiate Between:
Light reaction and Dark reaction.
Name two plants having variegated leaves.
