Photosynthesis Class 10 ICSE Biology MCQ Questions
Looking for Photosynthesis Class 10 ICSE Biology Chapter 6 MCQ Questions? If yes, You are the right page. Here we have provided ICSE class 10 biology Chapter 6 multiple choice questions and answers. All MCQ are important.
( I ) Choose the best answer
( 1 ) The most important life mechanism is
a ) Photosynthesis b ) Transpiration
c ) Respiration d ) None of the above
Answer : a ) Photosynthesis
( 2 ) There are immense significance of photosynthesis in life process. What are it’s major significance ?
a ) It renders food to the plants and animals
b ) It renders oxygen gas for the purpose of breathing
c ) It renders food to the plants , animals as well as humans and it also provides life aiding oxygen gas in order to breathe
d ) It renders support to the plants
Answer : c ) It renders food to the plants , animals as well as humans and it also provides life aiding oxygen gas in order to breathe
( 3 ) Which process is used by the plants for the purpose of preparing their food ?
a ) Production b ) Photosynthesis
c ) Respiration d ) Transpiration
Answer : b ) Photosynthesis
( 4 ) Plants mainly falls under the category of
a ) Self food distributors b ) Self food restorers
c ) Self food producers d ) Self food acquirers
Answer : c ) Self food producers
( 5 ) The procedurein which green plants utilizes light energy for the purpose of producing their own food is called
a ) Photosynthesis b ) Cellular respiration
c ) Evaporation d ) Food producers
Answer : a ) Photosynthesis
( 6 ) During photosynthesis, which by-product is released by plants ?
a ) Carbon dioxide b ) Hydrogen
c ) Nitrogen d ) Oxygen
Answer : d ) Oxygen
( 7 ) The sole biological process which contributes in releasing oxygen is
a )Chemosynthesis b ) Breathing
c ) Photosynthesis d )Respiration
Answer : c ) Photosynthesis
( 8 ) Which pigment is considered as the vital plant pigment ?
a ) Chlorophyll b ) Mesophyll
c ) Epidermal cells d ) All of the above
Answer : a ) Chlorophyll
( 9 ) The term ‘ Chloroplasts ‘ literally means
a ) Microscopic cell organelles containing chlorophyll
b ) Microscopic cell organelles without chlorophyll
c ) Microscopic cell organelles containing hydrolytic enzyme
d )The absence of hydrolytic enzyme in microscopic cell organelles
Answer : a ) Microscopic cell organelles containing chlorophyll
( 10 ) How many chloroplasts are contained in a cell ?
a ) 20 – 30 b ) 40 – 50
c ) 60 – 70 d ) 80 – 90
Answer : b ) 40 – 50
( 11 ) There are mainly nine types of chlorophyll . Out these nine types , two types of chlorophyll are most significant. What are the two types ?
a ) Chlorophyll – c and Chlorophyll – d b ) Chlorophyll – c1 and chlorophyll – c 2
c ) Chlorophyll e and chlorophyll f d ) Chlorophyll- a and chlorophyll – b
Answer : d ) Chlorophyll- a and chlorophyll – b
( 12) Excessive light possesses higher tendency of destroying
a ) Chlorophyll b ) Thylakoids
c ) Grana d ) Stroma
Answer : a ) Chlorophyll
( 13 ) It is not possible for any living being to survive without the support of
a ) Hydrogen b ) Carbon dioxide
c ) Oxygen d ) Nitrogen
Answer : c ) Oxygen
( 14 ) The theories that depicts the opening and closing of stomata are
a ) Potassium ion concentration theory b ) Sugar concentration theory
c ) Both Potassium ion concentration theory and sugar concentration theory
d ) None of the above
Answer : c ) Both Potassium ion concentration theory and sugar concentration theory
( 15 ) Light –Dependent phase and Light – Independent are the two essential phases of
a ) Dark respiration b ) Production
c ) Photo respiration d ) Photosynthesis
Answer : d ) Photosynthesis
(16 ) Light – Independent phase is also known as ?
a ) Biosynthetic phase b ) Photo chemical phase
c ) Reduction phase d ) Fixation phase
Answer : a ) Biosynthetic phase
( 17 ) Which one of the following is considered as the tiniest unit of light energy ?
a ) Quantum b ) Photons
c ) Electrons d ) Neutrinos
Answer : b ) Photons
( 18 ) The process of converting various glucose molecules into one molecules of starch is known by the term of
a ) Transformation b ) Depolymerisation
c ) Polymerisation d ) Conversion
Answer : c ) Polymerisation
( 19 ) An evolution of various adaptations in leaf has helped in the execution of
a ) Transpiration b ) Cellular respiration
c ) Creation d ) Photosynthesis
Answer : d ) Photosynthesis
( 20 ) Which one of the following enables swift exchange of gases ?
a ) Fewer stomata b ) Numerous stomata
c ) Moderate stomata d ) Nullified stomata
Answer : b ) Numerous stomata
( 21 ) The end – product(s) of photosynthesis is / are
a ) Glucose b ) Water
c ) Oxygen d ) All of the above
Answer : d ) All of the above
( 22 ) The requirement of simple sugar glucose by the plant is utilised in
a ) Four different ways b ) Five different ways
c ) Two different ways d ) Six different ways
Answer : a ) Four different ways
( 23 ) Which factor(s) are responsible for affecting photosynthesis ?
a ) External factors b ) Internal factors
c ) Both external and internal factors d ) None of the above
Answer : c ) Both external and internal factors
( 24 ) External factor(s) of photosynthesis primarily include
a ) Light intensity b ) Carbon dioxide concentration
c ) Temperature and water content d ) All of the above
Answer : d ) All of the above
( 25 ) The rate of photosynthesis gradually increases , with an increase in
a ) Oxygen concentration b ) Temperature
c ) Darkness d ) Aridness
Answer : b ) Temperature
( 26 ) Chlorophyll, Protoplasm and Structure of leaf falls under the category of
a ) Internal factors b ) External factors
b ) Ecological factors d ) Primary factors
Answer : a ) Internal factors
( 27 ) There is a decline in the rate of photosynthesis, when the protoplasm becomes
a ) Hydrated b ) Partially hydrated
c ) Dehydrated d ) Swollen
Answer : c ) Dehydrated
( 28 ) The plants that are capable of releasing oxygen even at the night time are
a ) Carrot and spinach b ) Pines and ferns
c ) Mint and cactus d ) Aloe vera , tulsi , neem and peepal
Answer : d ) Aloe vera , tulsi , neem and peepal
( 29 ) The CAM pathwayrenders support to the plants in executing photosynthesis even during
a ) Night b ) Day
c ) Dawn d ) Dusk
Answer : a ) Night
( 30 )The term ‘ Destarching ‘ literally means
a ) Addition of starch b ) Removal of starch
c ) Both addition and removal of starch d ) None of the above
Answer : b ) Removal of starch
( 31 )The process in which food energy is transferred when one organism eats another organism and this series of food reliance is known by the term of
a ) Food web b ) Food pyramid
c ) Food chain d ) Food dependence
Answer : c ) Food chain
( 32 ) Though there are variousintermediate stages in food chain , a plant always acts as the
a ) Quartile point b ) Ending point
c ) Medial point d )Starting point
Answer : d ) Starting point
(33 ) Which of the following non – green plants acquire their nutriments from decomposed organic materials ?
a ) Fungi and bacteria b ) Algae and cuscuta
c ) Linchens and marigolds d ) Cuscuta and linchens
Answer : a ) Fungi and bacteria
( 34 ) How many steps are primarily involved in carbon cycle ?
a ) Four b ) Eight
c ) Six d ) Ten
Answer : c ) Six
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