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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
A healthy oat seeding in a pot is transferred from light to any airy but completely dark room. How would it differ from its original condition in appearance after about a week? Explain the difference.
Two healthy green plants were placed in the dark for 24 hours. They were then set up, as shown in the figure, for 4 hours. Then a leaf was taken from each plant and
the chlorophyll was removed from the leaves:
( i) What is the next and final step in this experiment?
( ii ) What would be the results of the final step?
( iii ) Why was it necessary to grease the glass sheet?
( iv ) What hypothesis is being tested in this experiment?
The diagram is set up to demonstrate an experiment. Pond weed was placed in five water-filled tubes. The experiment was set up as shown in the diagram. The tubes were then left for 24 hours. Write the correct answer out of the five available choices:
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(a ) 1 (b) 2 (c) 3 (d) 4 (e ) 5
(ii) The tube in which most oxygen would be found is
(a ) 1 (b) 2 (c) 3 (d) 4 (e ) 5
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(a ) 1 (b) 2 (c) 3 (d) 4 (e ) 5
(iv) The tube in which the plant would survive for the shortest length of time is
(a ) 1 (b) 2 (c) 3 (d) 4 (e) 5
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The source of carbon dioxide for aquatic plants.
Chloroplasts are called energy converters.
ATP is needed for the dark reaction.
Name two aquatic plants which can be used for the experiment of photosynthesis.
Given below is the figure of an experimental set-up, showing a physiological act of the plants. Study and answer the following questions:
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- How do we destarch the leaves?
- What will be the observation when we pour iodine solution over the bleached experimental leaf?
- Write a well-balanced equation for the above process.
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- What is the main aim of the experiment?
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