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प्रश्न
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.
(i) What aspect of photosynthesis was being tested?
(ii) Why was the plant placed in the dark before beginning the experiment?
(iii) During the starch test, why was the leaf
(1) boiled in water
(2) boiled in methylated spirit
(iv) Write a balanced chemical equation to represent the process of photosynthesis.
(v) Draw a neat diagram of a chloroplast and label its parts.
उत्तर
(i) Light is required for photosynthesis.
(ii) Before beginning the experiment, the plant was kept in dark in order to destarch it, i.e. to remove the pre-existing starch from the storage organs.
(iii)
(1) The leaf was boiled in water to destroy enzymes so that further chemical changes do not take place in the leaf.
(2) The leaf was boiled in methylated spirit to dissolve chlorophyll.
(iv) Chemical equation for the process of photosynthesis:
6CO2+12H2O`"Light"/"Chlorophyll"`C6H12O6+6O2+6H2O
(v)Chloroplast:
APPEARS IN
संबंधित प्रश्न
Formalin, Iodine, DDT, Lime
The individual flattened stacks of membranous structures inside the chloroplasts are known as :
A. Grana
B. Stroma
C. Thylakoids
D. Cristae
Given below is an experiment setup to demonstrate a particualr tropic movement in germinating seeds. Study the diagram and answer the questions that follow : 
What is Thigmotropism? Give one example.
Given below is an experiment setup to demonstrate a particualr tropic movement in germinating seeds. Study the diagram and answer the questions that follow :
What is meant by ‘Positive’ and ‘Negative’ tropic movements in plants?
Fill in the blank:
Xanthophyll is ______ coloured pigment.
Choose the correct answer:
Photosynthesis is more active in ___________
Name the following:
The tissue that transports manufactured type of starch from leaves to all parts of the plants.
Are the following statement true or false? Give a reason in support of your answer.
Photosynthesis is considered as a process supporting all life on earth.
A candidate studied the importance of certain factors in photosynthesis. He took a potted plant and kept in the dark for over 24 hours. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch.
What aspect of photosynthesis was being investigated?
Explain the Term Free Energy.
Explain the term Plastoquinone.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Photosynthesis can also occur n artificial light such as that of a 100-watt electric lamp.
Write the functional activity of the following structure:
Granum
Autotrophs use _____,______ and chlorophyll to prepare their own food.
State whether true or false. If false, correct the statement.
When the weather is hot, water evaporates lesser which is due to opening of stomata.
______ is ATP factory of the cells.
The swollen basal part of the ______ pistil is the which bears the ______.
Sunflowers open the petals in bright light during the daytime but close the petals in dark at night. This response of sunflowers is called ______.
