Photosynthesis Class 10 ICSE Biology MCQ Questions

Photosynthesis Class 10 ICSE Biology MCQ Questions

photosynthesis class 10 mcqLooking 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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Updated: September 14, 2022 — 1:25 pm

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