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Class 10 Science
Life Process (Nutrition In Plants) Chapter 6
Quiz 1
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The opening and closing of stomata is controlled by:
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Guard cells
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Xylem
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Chloroplast
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Phloem
The stomatal pore opens when:
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Guard cells shrink
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Chloroplast of guard cells swell up
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Guard cells swell up
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Chloroplast of guard cells shrink
During photosynthesis, light energy from the sun is absorbed by:
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Mitochondria
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Guard cell
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Chlorophyll
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Stomata
Which of the following is the correct reaction of photosynthesis?
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A
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B
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C
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D
A minute pore which helps in exchange of gases is:
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Stomata
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Matrix
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Thylakoid
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Guard cell
When leaf of a normal plant is boiled in the ethanol and treated with iodine its color changes to:
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Pink
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Blue black
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Black
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Orange
Suppose you are performing the starch iodine-test to study photosynthesis. What will be the correct sequence of the following steps:i) Boiling leaf in alcohol. ii) Dipping leaf in iodine solution iii) Boiling leaf in water iv) Rinsing leaf with water
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ii,iii,iv,i
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iv, ii, ii, i
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iii,i,iv,ii
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i,ii,iii,iv
Which structure is used for gaseous exchange and loss of water in plants?
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Stomata correct
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Leaves
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Roots
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Buds
To make the plant free of starch, it is:
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Kept in darkness for 72 hours
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Kept in a room, but with lights on at night only
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Kept covered with coloured polythene in a shady place
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Kept under the shade of tree
To remove chlorophyll, the leaf is boiled into:
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Water
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Alcohol
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Iodine solution
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None of these
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