Photosynthesis MCQ Type Questions for ICSE Biology Class-10 . These MCQ / Objective Type Questions is based on latest reduced syllabus according 2021-22 session on bifurcated pattern. Main motto of MCQ Type Question is cracking the next upcoming exam of council. Visit official website CISCE for detail information about ICSE Board Class-10 Biology .
MCQ Type Questions Photosynthesis for ICSE Class-10 Biology
Board | ICSE |
Class | 10th (X) |
Subject | Biology |
Chapter | Photosynthesis |
Syllabus | on bifurcated syllabus (after reduction) |
Session | 2021-22 |
Topic | MCQ / Objective Type Question |
ICSE Class-10 Biology MCQ Type Questions of Photosynthesis
Question 1: The production of starch, and not glucose, is often used as a measure of photosynthesis in leaves because
(a) starch is immediate product of photosynthesis
(b) glucose formed in photosynthesis soon gets converted into starch
(c) starch is soluble in water
(d) sugar cannot be used
Answer (b) glucose formed in photosynthesis soon gets converted into starch
Question 2: The number of water molecules required in the chemical reactions to produce one molecule of glucose during photosynthesis is
(a) six
(b) twelve
(c) eighteen
(d) twenty-four
Answer (b) twelve
Question 3: The rate of photosynthesis is not affected by
(a) light intensity
(b) humidity
(c) temperature
(d) CO2 concentration
Answer (b) humidity
Question 4: Chlorophyll in a leaf is required for
(a) breaking down water into hydrogen and oxygen
(b) emitting green light
(c) trapping light energy
(d) storing starch in the leaves
Answer (c) trapping light energy
Question 5: The plastids which impart green colour to leaves.
(a) Chloroplast
(b) Xanthophyll
(c) Leucoplast
(d) Carotenes
Answer (a) Chloroplast
Question 6: The plastids which store starch in plants.
(a) Chromoplasts
(b) Chloroplasts
(c) Leucoplast
(d) none of these
Answer (c) Leucoplast
Question 7: Part of chloroplast where biosynthetic phase occurs.
(a) Thylakoid
(b) Mitochondria
(c) Granum
(d) Stroma
Answer (d) Stroma
Question 8: Light induced reactions which lead to splitting of water.
(a) Photolysis
(b) Photo-oxidation
(c) Electrolysis
(d) Activation
Answer (a) Photolysis
Question 9: Photophosphorylation
(a) A process in which a phosphate group is added to a molecule, such as a sugar or a protein
(b) The process of synthesizing energy rich ATP molecules from ADP in the presence of sunlight.
(c) A biochemical process that involves the addition of phosphate to an organic compound.
(d) A biochemical process that involves the addition of phosphate to an organic Compound.
Answer (b) The process of synthesizing energy rich ATP molecules from ADP in the presence of sunlight.
Question 10: A twig of a plant was kept inside a flask as shown is the diagram and it was kept in sunlight for a few hours.
What is the aim ot the experiment?
(a) To prove that carbon dioxide is necessary for photosynthesis.
(b) Sunlight is necessary for photosynthesis.
(c) To show that O2 was used up by the inside leaf part.
(d) To show that chlorophyll is necessary for photosynthesis
Answer (a) To prove that carbon dioxide is necessary for photosynthesis.
Question 11: If the rate of respiration becomes more than the rate of photosynthesis, plants will:
(a) continue to live, but will not be able to store food
(b) be killed instantly
(c) grow more vigorously because more energy will be available
(d) stop growing and die gradually of starvation
Answer (a) continue to live, but will not be able to store food
Question 12: Stroma
(a) Site of photolysis of photosynthesis
(b) Site of photochemical phase of photosynthesis
(c) Site of light dependent phase of photosynthesis
(d) Site of light independent phase of photosynthesis
Answer (d) Site of light independent phase of photosynthesis
Question 13: Grana.
(a) The chlorophyll molecules present in grana converts the light energy into chemical energy, ATP
(b) Provide the enzymes necessary for the light- independent phase of photosynthesis
(c) Helps in the fixation of carbon dioxide as photolysis takes place in grana.
(d) It is the site of light independent phase of photosynthesis
Answer (a) The chlorophyll molecules present in grana converts the light energy into chemical energy, ATP
Question 14: Which one chemical reaction occurs during photosynthesis?
(a) Carbon dioxide is reduced and water is oxidised
(b) Water is reduced and carbon dioxide is oxidised
(c) Both carbon dioxide and water are oxidised
(d) Both carbon dioxide and water are reduced
Answer (a) Carbon dioxide is reduced and water is oxidised
Question 15: The specific function of light energy in the process of photosynthesis is to
(a) reduce carbon dioxide
(b) synthesise glucose
(c) activate chlorophyll
(d) split water molecule
Answer (c) activate chlorophyll
Question 16: How many water molecules are needed to produce one molecule of glucose during photosynthesis?
(a) Six
(b) Twelve
(c) Eighteen
(d) Four
Answer (b) Twelve
Question 17: If the rate of respiration becomes more than rate of photosynthesis, plant will:
(a) Continue to live, but will not store food
(b) Grow more vigorously
(c) Stop growing and eventually will die
(d) Be killed instantly
Answer (c) Stop growing and eventually will die
Question 18: Which of the following reactions Occurs during photosynthesis?
(a) CO2 is reduced and water is oxidised
(b) H2O is reduced and CO2 is oxidised
(c) Both CO2 and H2O are reduced
(d) Both CO2 and H2O are oxidised.
Answer (a) CO2 is reduced and water is oxidised
Question 19: what is the function of light energy in photosynthesis?
(a) Reduce CO2
(b) Split water molecule
(c) Synthesise glucose
(d) Activate chlorophyll
Answer (d) Activate chlorophyll
Question 20: In flowering plants food is transported in the form of:
(a) Starch
(b) Sucrose
(c) Glycogen
(d) Cellulose
Answer (b) Sucrose
Question 21: Which internal factor affects the rate of photosynthesis?
(a) Light intensity
(b) Chlorophyll
(c) CO2 concentration
(d) Temperature
Answer (b) Chlorophyll
Question 22: A plant is kept in a dark cupboard for 48 hours before conducting any experiment on photosynthesis in order to
(a) remove chlorophyll from leaves
(b) remove starch from the leaves
(c) ensure that no photosynthesis occurred
(d) ensure that the leaves are free from starch
Answer (d) ensure that the leaves are free from starch
Question 23: During photosynthesis, the oxygen in glucose comes from
(a) CO2
(b) water
(c) both CO2 and water
(d) oxygen via air
Answer (a) CO2
Question 24: Which two substances are the products of photosynthesis?
(a) Carbon dioxide and glucose
(b) Carbon dioxide and water
(c) Oxygen and carbon dioxide
(d) Oxygen and glucose
Answer (d) Oxygen and glucose
Question 25: Where does light reaction of photosynthesis take place
(a) Grana of chloroplast
(b) Stroma of chloroplast
(c) Cytoplasm of cell
(d) Mitochondria
Answer (a) Grana of chloroplast
Question 26: The rate of photosynthesis in not affected by which one of the following factor?
(a) CO2 concentration
(b) Light intensity
(c) Temperature
(d) Wind velocity
Answer (d) Wind velocity
Question 27: The assimilatory powers for dark reaction are:
(a) ATP and O2
(b) ATP and NADPH
(c) ATP and H2O
(d) O2 and CO2
Answer (b) ATP and NADPH
Question 28: Chemical used to absorb CO from inside a flask is:
(a) Calcium chloride
(b) Potassium hydroxide
(c) Pyrogallic Acid
(d) iodine solution
Answer (b) Potassium hydroxide
Question 29: Which of the following is not the phase of light reaction?
(a) Water splitting
(b) Oxygen release
(c) Carbon dioxide release
(d) Light absorption
Answer (c) Carbon dioxide release
Question 30: Why is the green leaf boiled with water in the test of starch?
(a) Remove the starch
(b) Kill the microbes
() Remove chlorophyll
(d) Kill the cell
Answer (d) Kill the cell
Question 31: Coleus, Geranium and Croton are the plants with ……………..
(a) Various leaves
(b) Non-Green leaves
(c) Green leaves
(d) Variegated leaves
Answer (d) Variegated leaves
Question 32: The chemical used to test starch
(a) Soda lime
(b) Carbolic acid
(c) Methylated spirit
(d) lodine
Answer (d) lodine
Question 33: Destarching
(a) The process of removal of all the stored starch of a plant by keeping in dark.
(b) Addition of starch after formation of glucose during photosynthesis.
(c) Polymerisation of starch after formation of glucose during photosynthesis.
(d) Keeping the plant in dark for storage of starch.
Answer (a) The process of removal of all the stored starch of a plant by keeping in dark.
Question 34: The diagram below show two test-tubes A and B. Test-tube A comtain a green water plant. Test-tube B contain both a green water plant and a snail. Both test-tube are kept in sunlight.
Which water plant can be used in the experiment ?
(a) Hydrilla
(b) Chara
(c) Ectocarpus
(d) Ulva
Answer (a) Hydrilla
Question 35: 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. What aspect of photosynthesis is being tested in the below diagram?
(a) Carbon dioxide is necessary for photosynthesis
(b) Sunlight is necessary for photosynthesis.
(c) O2 is necessary for photosynthesis.
(d) Chlorophyll is necessary for photosynthesis
Answer (d) Chlorophyll is necessary for photosynthesis
Question 36 The production of starch, and not glucose, is often used as a measure of photosynthesis in leaves because
(a) starch is immediate product of photosynthesis
(b) glucose formed in photosynthesis soon gets converted into starch
(c) starch is soluble in water
(d) sugar cannot be used
Answer (b) glucose formed in photosynthesis soon gets converted into starch
Question 37 The number of water molecules required in the chemical reactions to produce one molecule of glucose during photosynthesis is
(a) six
(b) twelve
(c) eighteen
(d) twenty-four
Answer (b) twelve
Question 38 The rate of photosynthesis is not affected by
(a) light intensity
(b) humidity
(c) temperature
(d) CO2 concentration
Answer (b) humidity
Question 39 Chlorophyll in a leaf is required for
(a) breaking down water into hydrogen and oxygen
(b) emitting green light
(c) trapping light energy
(d) storing starch in the leaves
Answer (c) trapping light energy
Question 40 If the rate of respiration becomes more than the rate of photosynthesis, plants will:
(a) continue to live, but will not be able to store food
(b) be killed instantly
(c) grow more vigorously because more energy will be available
(d) stop growing and die gradually of starvation
Answer (a) continue to live, but will not be able to store food
Question 41 Which one chemical reaction occurs during photosynthesis?
(a) Carbon dioxide is reduced and water is oxidised
(b) Water is reduced and carbon dioxide is oxidised
(c) Both carbon dioxide and water are oxidised
(d) Both carbon dioxide and water are reduced
Answer (a) Carbon dioxide is reduced and water is oxidised
Question 43 The specific function of light energy in the process of photosynthesis is to
(a) reduce carbon dioxide
(b) synthesise glucose
(c) activate chlorophyll
(d) split water molecule
Answer (c) activate chlorophyll
Question 44 A plant is kept in a dark cupboard for 48 hours before conducting any experiment on photosynthesis in order to
(a) remove chlorophyll from leaves
(b) remove starch from the leaves
(c) ensure that no photosynthesis occurred
(d) ensure that the leaves are free from starch
Answer (d) ensure that the leaves are free from starch
Question 45 During photosynthesis, the oxygen in glucose comes from
(a) CO2
(b) water
(c) both CO2and water
(d) oxygen via air
Answer (a) CO2
–: End of Photosynthesis MCQ Type Questions for ICSE Biology Class-10 :-
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It would be better if this was a pdf
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Some of the answers are utter wrong
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