Stroma is a protein colloidal complex that fits the interior of the chloroplast are regarded as the site of light reaction of photosynthesis units are located there. Granum are green coloured structures embedded in the stroma, each consists of many disc-shaped membranous sac called thylakoids.

Match the following: Column I Column II i) Autotrophs a) Is the place for light reaction of photosynthesis ii) Photolysis b) Is the place for dark reaction of photosynthesis iii) Bacteria and fungi c) Light reaction iv) Stomata closed d) During night v) By-products of photosynthesis e) Green plants vi) The grana f) Oxygen vii) The stroma g) Decomposers.

i)-(e) Plants are known as autotrophs because they are able to prepare their own food. ii)- (c) Photolysis of water is a first step in light reaction process through which water is broken down into oxygen, hydrogen ion (proton) and electrons. iii)-(g) Bacteria and fungi can decompose rotten material and increase soil fertility. iv)-(d) Photosynthesis cannot take place at night as photolysis of water would not take place. Stomata help in the exchange of gases like oxygen and carbon dioxide. It remains closed during night. v)-(f) By-products of photosynthesis are glucose and oxygen. vi)-(a) In grana, light reactions of photosynthesis takes place. Thylakoids are arranged in stacks like the piles of coins called grana (singular; granum). vii)-(b) In stroma, dark reaction of photosynthesis takes place. The stroma of the chloroplast contains enzymes required for the synthesis of carbohydrates and proteins. Column I Column II i) Autotrophs e) Green plants ii) Photolysis c) Light reaction iii) Bacteria and fungi g) Decomposers iv) Stomata closed d) During night v) By-products of photosynthesis f) Oxygen vi) The grana a) Is the place for light reaction of photosynthesis vii) The stroma b) Is the place for dark reaction of photosynthesis

Define thylakoid

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IMPORTANT

ICSE Self - Study in Biology>Chapter 5 - Photosynthesis>TEST YOURSELF>Q 1

_____ (Plastids/ Leucoplasts/ Chromoplasts/ Chloroplasts) are regarded as complete photosynthetic units of plants.

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10th ICSE

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ICSE Self - Study in Biology>Chapter 5 - Photosynthesis>TEST YOURSELF>Q 2

What is photophosphorylation?

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IMPORTANT

ICSE Self - Study in Biology>Chapter 5 - Photosynthesis>TEST YOURSELF>Q 2

State the role of ATP.

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ICSE Self - Study in Biology>Chapter 5 - Photosynthesis>TEST YOURSELF>Q 3

The figure below represents an experiment performed to demonstrate a particular aspect of photosynthesis. The apparatus was kept in sunlight for almost the whole day. The numeral 1 represents a certain condition inside the flask and numeral 2 represents a chemical responsible for this condition.
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What is the object of this experiment?

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10th ICSE

IMPORTANT

ICSE Self - Study in Biology>Chapter 5 - Photosynthesis>TEST YOURSELF>Q 3

The figure below represents an experiment performed to demonstrate a particular aspect of photosynthesis. The apparatus was kept in sunlight for almost the whole day. The numeral 1 represents a certain condition inside the flask and numeral 2 represents a chemical responsible for this condition.

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What is the special condition inside the flask?

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10th ICSE

IMPORTANT

ICSE Self - Study in Biology>Chapter 5 - Photosynthesis>TEST YOURSELF>Q 3

The figure below represents an experiment performed to demonstrate a particular aspect of photosynthesis. The apparatus was kept in sunlight for almost the whole day. The numeral 1 represents a certain condition inside the flask and numeral 2 represents a chemical responsible for this condition.

Question Image

What is the chemical substance numbered 2?

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10th ICSE

IMPORTANT

ICSE Self - Study in Biology>Chapter 5 - Photosynthesis>TEST YOURSELF>Q 9

Match the following:

Column I	Column II
i) Autotrophs	a) Is the place for light reaction of photosynthesis
ii) Photolysis	b) Is the place for dark reaction of photosynthesis
iii) Bacteria and fungi	c) Light reaction
iv) Stomata closed	d) During night
v) By-products of photosynthesis	e) Green plants
vi) The grana	f) Oxygen
vii) The stroma	g) Decomposers.

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10th ICSE

IMPORTANT

ICSE Self - Study in Biology>Chapter 5 - Photosynthesis>TEST YOURSELF>Q 10

Given below is the representation of a certain phenomenon in nature with four organisms (1)-(4).

$P l a n t \to g r a s s h o p p e r \to f r o g \to s n a k e \to ? (1) (2) (3) (4) (5)$

What is food web?

Define thylakoid.

Important Questions on Photosynthesis

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