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प्रश्न
The figure given below represents an experiment to demonstrate a particular aspect of photosynthesis. The alphabet ‘A’ represents a certain condition inside the flask.
(i) What is the aim of the experiment?
(ii) Identify the special condition inside the flask.
(iii) Name an alternative chemical that can be used instead of KOH.
(iv) In what manner do the leaves 1 and 2 differ at the end of the starch test?
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उत्तर
(i) To prove that CO2 is necessary for photosynthesis.
(ii) No CO2 in the flask.
(iii) CaO (limestone), potassium pyrogollate.
(iv) Leaf 1, no change in colour with a starch list.
Leaf 2, will turn blue-black at the end of starch test.
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संबंधित प्रश्न
Name the following:
The part of chloroplast where the dark reaction of photosynthesis takes place.
Which tissues and cells are mainly concerned with photosynthesis?
A well-watered healthy potted plant with variegated leaves was kept in darkness for about 24 hours. It was then set up as shown in the diagram and exposed to light for about 12 hours. At the end of this time, leaf X and leaf Y were tested for starch. Study the diagram and answer the questions that follow:
(i) Why was the plant initially kept in darkness for 24 hours?
(ii) What is the function of the sodium hydroxide solution in the flask?
(iii) Select the correct leaf from the five available choices shown in the diagram as A, B, C, D, and E. Rewrite the correct answer for the filling in the appropriate letter from the questions that follow:
1. After the starch test, leaf X would look like.
2. After the starch test, leaf Y would look like.
Complete the following sentence with appropriate word:
The conversion of the physical energy of light into chemical energy by the chloroplast is called ____________.
Complete the following sentence with appropriate word:
Calvin cycle was proposed by __________.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
CO2 is the life-supporting gas produced due to photosynthesis.
Mention the significance of the following mineral:
Magnesium for green plants.
The basic functional unit of solar energy which is absorbed by the pigment chlorophyll is ______.
Define the following term:
Chloroplast
Distinguish between the following pairs on the basis of the word indicated in the bracket ( ).
Stoma and Stroma (structure)
