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प्रश्न
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.
उत्तर
(c) to remove the chlorophyll
When carrying out the starch test, it is important to remove the chlorophyll by boiling the leaf in alcohol. This is done because the green colour of the chlorophyll interferes with the iodine test.
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संबंधित प्रश्न
The autotrophic mode of nutrition requires ______.
Name the following:
The pores through which leaves exchange gases.
The leaves of a plant first prepare food A by photosynthesis. Food A then gets converted into food B. What are A and B?
Why do plants need nitrogen? How do plants obtain nitrogen?
The cell organelle where photosynthesis occurs.
What will happen to the rate of photosynthesis on a plant under the following circumstances?
(i) cloudy day in morning but bright sunshine in the afternoon
(ii) no rainfall in the area for a considerable time.
(iii) gathering of dust on the leaves
Most of the plants absorb nitrogen in one of the following forms. This is:
(a) proteins
(b) nitrates and nitrites
(c) urea
(d) atmospheric nitrogen
Explain the process of production of food in plants.
The internal (cellular) energy reserve in autotrophs is
The term that is used for the mode of nutrition in yeast, mushroom and bread-mould is
