Biology
A potted plant with variegated leaves was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours and then placed in bright sunlight for a few hours. Observe the diagram and answer the questions:
(a) What aspect of photosynthesis is being tested in the above diagram?
(b) Why was the plant placed in the dark before beginning the experiment?
(c) Write a balanced chemical equation to represent the process of photosynthesis.
(d) What will be the result of starch test when performed on leaf A shown in the diagram?
(e) Draw a neat and labelled diagram of a chloroplast.
Photosynthesis
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Answer
(a) The above experiment is conducted to show that chlorophyll is necessary for photosynthesis.
(b) The plant was placed in the dark before beginning the experiment to destarch the leaves.
(c) Balanced chemical equation representing the process of photosynthesis is given below:
(d) After the starch test on leaf A, only the green parts of the leaf turn bluish, showing the presence of starch.
(e) Below diagram shows Chloroplast with its different parts labelled:
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Related Questions
Given below is the diagram of an experimental set-up:
a. What is the objective of this experiment?
b. Will it work satisfactorily? Given reason.
c. What alteration (s) will you make in it for obtaining expected result?
d. Would you take any step before starting the experiment? Describe this step and explain its necessity.
Given below is a schematic diagram to illustrate some aspects of photosynthesis.
(a) Fill up the gaps, in blank spaces (1-4), by writing the names of the correct items.
(b) What phenomenon do the thick arrows A and B indicate?
Given below is the representation of a certain phenomenon in nature with four organisms 1-4.
(a) Name the phenomenon represented.
(b) Name any one organism that could be shown at No .5
(c) Name the biological process which was the starting point of the whole chain.
(d) Name one natural element which all the organisms 2-4 and even 5 are getting from No. 1 for their survival.
Draw a neat diagram of the stomatal apparatus found in the epidermis of leaves and label the Stoma, Guard cells, Chloroplast, Epidermal cells, Cell wall and Nucleus.