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Photosynthesis - Provider Of Food For All
Question
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 which can be used instead of KOH
iv In what manner do the leaves 1 and 2 differ at the end of the starch test?
Solution
i. The aim of the experiment is to prove that carbon dioxide is necessary for
photosynthesis.
ii. The special condition inside the flask is that the air inside the flask contains no
carbon dioxide as all the carbon dioxide is absorbed by the KOH.
iii. An alternate chemical which can be used instead of KOH is soda lime.
iv. The leaf 1. when tested for the presence of starch turned brown, indicating the absence of starch,
while leaf 2 which is outside the flask, turned blue-black, indicating the presence of starch.
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Some More Questions From Photosynthesis - Provider of Food For All Chapter
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 which can be used instead of KOH
iv In what manner do the leaves 1 and 2 differ at the end of the starch test?
Differentiate between the following pairs on the basis of what is mentioned within brackets:
Photolysis and Photophosphorylation (definition)
Name the following :
The part of the chloroplast where the light reaction of photosynthesis takes place.
Match the items in Column I with that which is most appropriate in Column II.
Give reasons for the following:
(v) Photosynthesis is considered as a process supporting all life on Earth.
State whether the following statements are true or false. lf false rewrite the correct
form of the statement by changing the first or last word only.
Explain the following terms:
(v) Destarched plant
Give one point of difference between the following on the basis of what is given in the brackets:
(v) Light reaction and dark reaction (site of occurrence)
Give the biological/technical term for the following:
(vii) Process of conversion of several molecules of glucose to one molecule of starch.
Mock Test Series
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