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Science · 2024 · 3 marks
CBSE 2024 · Region 1 · Set 2 · Q30
In the context of the statement "chlorophyll is necessary for photosynthesis" answer the following questions: (i) What are variegated leaves? Give an…
In the context of the statement "chlorophyll is necessary for photosynthesis" answer the following questions :
(i)
What are variegated leaves? Give an example.
(ii)
When leaf is boiled in alcohol, what happens to the colour of the leaf and the colour of the solution ?
(iii)
In what form is the carbohydrate produced, stored in the plant? Why is chlorophyll necessary for photosynthesis ?
Marking-scheme solution
(i) Leaves with green (Chlorophyll) and non-green patches (white or yellow patches)
e.g. croton/money plant/ any other
(ii) Leaf becomes colorless;
The solution becomes green
(iii)
Starch. Chlorophyll helps the plant to absorb energy of the sunlight for the process of photosynthesis
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CBSE Class 10 Science past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.