NEET BIOLOGY QUESTION BANK/LIGHT REACTION PIGMENTS

LIGHT REACTION PIGMENTS

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1) Chlorophyll molecules has the structure like

A) Monopyruvic                                  B) Dipyruvic

C) Tripyruvic                                       D) Tetrapyruvic

 

 2) Chlorophyll 'e' is generally present in

A) Thallophytes                                  B) Rhodophytes

C) Mycophytes                                    D) Xanthophytes

 

 3) The light phase of photosynthesis is called

A) Hill reaction                                  B) Photo action

C) Pigment action                              D) Chlorophyllous process

 

 4) Ferrodoxin contain [Haryana PMT 2005]

A) Mg                          B) CO

C) Iron                         D) Nitrites

 

 5) Which type of phosphorylation takes place in photosynthesis

A) Cyclic                                  B) Non-cyclic

C) Both [a] and [b]                D) None of the above

 

 6) Unidirectional flow of electrons in photophosphorylation takes place in

A) Cyclic                                  B) Non-cyclic

C) Pseudocyclic                      D) All the above

 

 7) In light reaction of photosynthesis, chlorophyll is subjected to

A) Destruction                                    B) Permanent reduction

C) Oxidation and reduction              D) Neutralization

 

 8) Photosynthetic pigments in chloroplast are embedded in membrane of [CBSE PMT 1991]

A) Thylakoids                                      B) Photoglobin

C) Matrix                                             D) Envelope of chloroplast

 

 9) Ferredoxin is a component of [CBSE PMT 1991]

A) Hill reaction                                  B) Photosystem-I

C) P-680                                              D) Photosystem-II

 

 10) Which of the following pigment is yellow in colour

A) Chlorophyll 'a'                              B) Chlorophyll 'b'

C) Carotene                                        D) Xanthophyll

 

 11) Which of the following is the non-polar part of chlorophyll

A) Phytol                                             B) Porphyrin

C) Pyrrol                                              D) None of the above

 

 12) Which of the following wavelength occur in red part of the spectrum

A) 470 nm                   B) 390 nm

C) 680 nm                   D) 830 nm

 

 13) Which of the following product of photosynthesis is produced first

A) Glucose

B) Oxygen

C) Both [a] and [b] together

D) None of the above

 

 14) Which of the following is black-yellow pigment of carrot roots

A) Alpha-carotene                  B) Beta-carotene

C) Violoxanthin                      D) Fucoxanthin

 

 15) Chlorophyll molecule (PS-II) when excited and electron so released passes first into

A) Plastoquinone

B) Plastocyanin

C) Ferredoxin

D) Ferredoxin reducing substrate

 

 16) Solarisation is [BHU 2005]

A) Formation of chlorophyll

B) Destruction of chlorophyll

C) Utilisation of sunlight

D) Effects of solar light

 

 17) Elements required for photolysis of water [BHU 2005]

A) Mn      B) Mg

C) Fe        D) Zn

 

 18) How many molecules of water should be photolyzed to form a

NADPH2

molecule

A) 4                 B) 2

C) 6                 D) 1

 

 19) If E is Emerson effect, x is the rate of oxygen production in mixed beam of light, y is the rate of

O2

production in low wavelength of light and z is the rate of

O2

evolution in high intensity of red light. What will be the value of E

A)  x−uz

B)  x−zu

C)  z−ux

D)  z−xu

 

 20) The process for which manganese and chloride ions are required is

A) Photolysis of water

B) For transfer of H+ ion to NADP

C) For transfer of charge of hydroxyl ion to chlorophyll

D) None of the above

 

 21) What is the quantum yield of photosynthesis

A) 8%    B) 12%    C) 9%     D) 33%

 

 22) What is the absorption maxima of P-700

A) 700Ao    B) 683 nm    C) 700 cm    D) 700 nm

 

 23) NADPH2  is generated through [CBSE PMT 1997]

A) Glycolysis

B) Photosystem-I

C) Photosystem-II

D) Anaerobic respiration

 

 24) Quantasomes are present in

A) Pigment system-I

B) Pigment system-II

C) Both [a] and [b]

D) None of the above

 

 25) Which of the chlorophyll type ejects the electron during photophosphorylation

A) Chlorophyll 'b'

B) Chlorophyll 'a'

C) Chlorophyll 'a' and 'b'

D) Xanthophyll

 

 26) In C3 plants, phosphoketopentose epimerage is required for converting

A) Ribose into ribulose

B) Xylulose to ribulose

1,5DiPO4

C) Erythrose to xylulose

D) None of the above

 

 27) Photosystem-II occurs in [CBSE PMT 1992; RPMT 1999; BHU 2001]

A) Stroma

B) Grana

C) On surface of mitochondria

D) On cytochrome

 

 28) The source of

O2

liberated in photosynthesis in green plants is [CPMT 1982, 84, 91, 94, 95; DPMT 1983, 84; MP PMT 1984, 2002; Bihar MDAT 1992; RPMT 1999]

A) Photosynthetic enzyme

B) Carbohydrate present in leaf

C) Water

D) Carbon dioxide

 

 29) In blue-green algae photosystem-II contain an important pigment concerned with photolysis of water it is called [BHU 1989, 90]

A) Beta carotene

B) Chlorophyll 'b'

C) Cytochrome 'c'

D) Phycocyanin

 

 30) The site of oxygen evolution and photosynthetic phosphorylation in chloroplast are [MP PMT 1988]

A) Matrix

B) Grana stacks

C) Inner wall of chloroplast

D) Surface of chloroplast

 

 31) The specific function of light energy in the process of photosynthesis is to [CPMT 1978, 81, 84; MP PMT 1984, 89]

A) Activate chlorophyll

B) Split water

C) Reduce carbon dioxide

D) Synthesize glucose

 

 32) In cyclic photophosphorylation which one of the following is formed [AMU 1988]

A) ATP                 B) NADP and ATP       C) NADH2 and O2

D) NADPH2, ATP and O2

 

 33) NADP is converted into

NADPH2 in [CBSE PMT 1988]

A) Photosystem-I     B) Non-cyclic photophosphorylation

C) Calvin cycle   D) Photosystem-II

 

 34) When a cell converts light energy into chemical energy, which of the following reaction would take place [MP PMT 1989; BHU 1980]

A) ADP + IP = ATP

B) ATP - IP = ADP

C) AMP + IP = ADP

D) GDP + P = GTP

 

 35) The brown colour of some algae is due to the presence of pigments [DPMT 1991]

A) Chlorophyll

B) Phycocyanin

C) Carotene

D) Fucoxanthin

 

 36) Pigment system-I receives radiant energy and releases electron [MP PMT 1992]

A) Chlorophyll-683

B) Chlorophyll-673

C) Chlorophyll-695

D) P-700

 

 37) The basic structure of all chlorophyll comprises of [BHU 1983]

A) Porphyrin system

B) Cytochrome system

C) Plastocyanin system

D) Flavoproteins only

 

 38) Which of the following pigment is soluble in water [MP PMT 1989; CPMT 1983, 94]

A) Chlorophyll

B) Carotene

C) Anthocyanin

D) Xanthophyll

 

 39) Where does the primary photochemical reaction occur in chloroplast or Where does the light reactions of photosynthesis take place or Light reaction takes place in [RPMT 1985,95, 99; CPMT 1984,95,98; MP PMT 1988, 99; Pb. PMT 1999,2000]

A) Stroma

B) Edoplasmic reticulum

C) Quantasome or thylakoids (Grana)

D) Inner membrane of chloroplast

 

 40) The trapping Centre of light energy in photosystem-I is [BHU 1983, 2000; JIPMER 1988; BVP 2003]

A) P-660

B) P-680

C) P-700

D) P-720

 

 41) Blue-green algae shows

A) Chlorophyll 'a'

B) Chlorophyll 'b'

C) Both [a] and [b]

D) None of the above

 

 42) Pigment system-I conducts [JIPMER 1986, 90; AMU 1987]

A) Cyclic photophosphorylation

B) Non-cyclic photophosphorylation

C) Both [a] and [b]

D) None of the above

 

 43) Pigment system-II is concerned with [BHU 1981,92, 2003; MHCET 2000]

A) Photolysis of water

B) Reduction of

CO2

C) Flowering

D) None of the above

 

 44) The role of chlorophyll in photosynthesis is [NCERT 1977; CBSE PMT 2002]

A) Absorption of

CO2

B) Absorption of light

C) Absorption of light and photochemical decomposition of water

D) Absorption of water

 

 45) Photophosphorylation is a process in which [NCERT 1984; CPMT 1980, 84; MP PMT 1989, 96]

A) Light energy is converted into chemical energy in the form of ATP

B) NADP is formed

C) Chemical energy is used to produce ATP

D)

CO2

is reduced to carbohydrate

 

 46) Light is necessary during photosynthesis for [NCERT 1978]

A) Evolution of hydrogen

B) Photolysis of water

C) Heating

D) Opening of stomata

 

 47) Chlorophyll is present [CPMT 1987]

A) On the surface of chloroplast

B) In the stroma of chloroplast

C) In the grana of chloroplast

D) Dispersed throughout the chloroplast

 

 48) Through which of the following substances the photosystem-I passes an electron to NADP during light reactions [AMU 1987; Bihar MDAT 1991]

A) Plastocyanin

B) Plastoquinone

C) Cytochrome

D) Ferredoxin

 

 49) During photochemical reactions of photosynthesis [CPMT 1986]

A) Liberation of oxygen takes place

B) Formation of ATP and

NADPH2

take place

C) Liberation of

O2

and formation of ATP and

NADPH2

take place

D) Assimilation of

CO2

takes place

 

 50) The core metal of chlorophyll is [CBSE PMT 1997,99; AFMC 1999; CPMT 2005]

A) Fe

B) Mg

C) Ni

D) Cu

 

 51) Hill's reaction takes place in [CPMT 1986]

A) Dark

B) Light

C) Dark and light both

D) At any time

 

 52) Anthocyanin generally occurs in the nature in the form of

A) Chlorides

B) Phosphates

C) Both [a] and [b]

D) None of the above

 

 53) The approximate dimension of chlorophyll porphyrin ring is

A)

1Ao

square

B)

5Ao

square

C)

10Ao

square

D)

15Ao

square

 

 54) Chlorophyll a molecule lost 1 electron from its outer orbit and gain

A) Negative charge

B) Becomes neutral

C) Positive charge

D) None of the above

 

 55) The life of all excited chlorophyll molecules is

A) Less than 0.01 second

B) More than 0.01 second

C) 10 seconds

D) 1 second

 

 56) Chlorophyll is [MP PMT 1996; BVP 2002]

A) Soluble in organic solvents

B) Soluble in water

C) Soluble in both organic solvents and water

D) None of the above

 

 57) The role of phycobilin’s in photosynthesis is to

A) Absorb and transfer energy to chlorophyll

B) Donate electrons to the electron transport system

C) Fix carbon dioxide

D) Carry hydrogen or electrons

 

 58) The main difference between the molecules of chlorophyll a and b is

A) Chlorophyll a has an aldehyde group while chlorophyll b has a methyl group

B) Chlorophyll a has a methyl group while chlorophyll b has an aldehyde group

C) The phytol tail is absent in chlorophyll a and is present in chlorophyll b

D) The porphyrin group in chlorophyll b has no binding site but a binding site is present in chlorophyll a

 

 59) Which element is left when chlorophyll is burnt [CPMT 1993]

A) Iron

B) Manganese

C) Magnesium

D) Molybdenum

 

 60) Chloroplasts absorb light of wavelength [CPMT 1994]

A)

200−300mμ

B)

800−1000mμ

C)

460−660mμ

D)

300−400mμ

 

 61) The reaction Centre for PS-I and PS- II are [MP PMT 2003]

A)

P700

and

P680

respectively

B)

P680

and

P700

respectively

C)

P580

and

P700

respectively

D)

P700

and

P580

respectively

 

 62) Results of light reaction is/are [MDAT Bihar 1995; KCET 1994]

A) Only ATP

B) Only

NADPH2

C) ATP and

NADPH2

D) Only FAD

E) None of these

 

 63) Photosystem-I contains [BHU 1983; RPMT 1987, 92]

A) Chl a, Chl b, carotenoid and

P680

B) Chl a, Chl b and

P690

C) Chl a, Chl b and

P700

D) Chl a, xanthophyll and

P700

 

 64) True for each quantasome is that

A) Chl b > Chl > carotene > quinones

B) Carotene > Chl b > Chl a > quinones

C) Chl a > Chl b > carotenoid > quinones

D) Quinones > Chl a > carotenoid > Chl b

 

 65) The separation of water into hydrogen and oxygen during photosynthesis is aided by

A) Nitrogen and phosphorus compounds

B) Mn and chloride ions

C) Fe and high turgor pressure

D) Cu and Mo atoms

 

 66) Fluorescent chlorophyll 'an' occurs in

A) PS-I

B) PS-II

C) [a] and [b] both

D) Stroma

 

 67) Absorption of light by chlorophyll of PS - II causes

A) Reduction of

CO2

B) Photolysis of H2O

C) Flowering

D) Glucose formation

 

 68) An isolated chloroplast upon illumination converts ferric into ferrous and produces

O2

. What happens if it is washed in running water prior to illumination

A) Only

O2

 is produced

B) Only ferric is converted into ferrous

C) Both the above happens

D) Neither

O2

is produced nor ferric is reduced

 

 69) Continued evolution of

O2

in suspension of an isolated chloroplast in light in the presence of ferric salt, viologen dyes etc. is called

A) Emmerson's reaction

B) Hill's reaction

C) Blackman's reaction

D) Oxygenation

 

 70) Which photochemical reaction generates strong oxidant and weak reductant

A) LR-I

B) LR-II

C) Cyclic photophosphorylation

D) Non-cyclic photophosphorylation

 

 71) The two light reactions when absorb light drive the flow of electrons against an electrochemical gradient from

A) - 1.1 volt to + 0.8 volt

B) + 0.8 volt to - 0.3 volt

C) + 2.0 volt to + 5.2 volt

D) - 0.5 volt to + 25 volt

 

 72) The energy of a? mole? of light quanta is 72 kcal in blue region at 400 nm and 41 kcal in red region at 700 nm. How much light energy would be required under standard conditions to make 1 mole of glucose costing 686 kcal

A) 1986 kcal

B) 1968 to 3456 kcal

C) 2620 to 3456 kcal

D) 1980 kcal

 

 73) Which of the following does not participate when the light reaction synthesizes only ATP or performs the cyclic flow of electrons [AIIMS 1981]

A) PS-I

B) PS-II

C) Ferredoxin

D) Plastocyanin

 

 74) The first electron carrier molecule from

P700

to

NADP+

is believed to be

A) Cytochrome

B) Cu protein/plastocyanin

C) FeS protein/ferredoxin

D) FeMg protein

 

 75) How much energy in terms of ATP equivalents is consumed in the photosynthetic production of a mole of hexose

A) 36 ATP eq.

B) 38 ATP eq.

C) 40 ATP eq.

D) 54 ATP eq.

 

 76) Chlorophyll converts

A) Light energy into chemical

B) Chemical energy into light

C) Light energy into electrical

D) Electrical energy into food

 

 77) In higher plants, the photosynthetic pigments are

A) Chl a + Chl b + anthocyanins

B) Chl a + carotenoid

C) Chl a + Chl b + carotenoid

D) Chl b + carotenoid + phycobilins

 

 78) Why the rate of photosynthesis declines at very strong light intensities. It may be due to

A) Increased respiration

B) Decreased hydration

C) Photo-oxidation of chlorophyll

D) All the above

 

 79) Chlorophyll 'a' and 'b' shows maximum absorption in

A) Blue region

B) Red region

C) Blue and red regions

D) Yellow and violet regions

 

 80) What are the two peaks of light absorption of Chlorophyll 'a'. The two peaks are near

A) 400 and 500 nm

B) 430 and 730 nm

C) 430 and 660 nm

D) 400 and 660 nm

 

 81) How chlorophyll would appear when seen in red light

A) Red

B) Green

C) Black

D) Colourless

 

 82) What is a quantasome

A) Particle of photosynthetic pigments

B) A macro-molecule

C) An enzyme

D) A cofactor of

CO2

assimilation

 

 83) Who revealed the chemical composition of chlorophyll carotene and xanthophyll

A) Govindjee

B) Willstatter and Stoll

C) Park and Biggins

D) Meyers and French

 

 84) Which one is

Cu++

containing pigment [CPMT 1999, 2003; MP PMT 2003]

A) Ferredoxin

B) Plastocyanin

C) Plastoquinone

D) Cytochrome

 

 85) The chlorophylls absorb visible light in the region of following wavelengths [BHU 1994]

A) 400 nm to 500 nm only

B) 600 nm to 800 nm only

C) 400 nm to 500 nm and 600 nm to 700 nm

D) 300 nm to 400 nm only

 

 86) In photosynthesis the energy formed is transferred in the form of [Bihar MDAT 1995]

A) ADP

B) AMP + ADP

C)

NADPH2+ATP

D) ATP

 

 87) Photolysis of water takes place in [CPMT 1995]

A) Calvin cycle

B) Glycolysis

C) Light phase

D) Dark phase

 

 88) In which stage of photosynthesis, light is directly necessary [CPMT 1996]

A) For electron exitation

B) For reduction of

CO2

C) For regulating photosystem

D) For cyclic photophosphorylation

 

 89) Hill's law in photosynthesis shows [CPMT 1996]

A) Electron exitation

B) Removal of water

C) Fixation of

CO2

D)

O2

is obtained from water

 

 90) The ?Z? scheme of photosynthesis was proposed by

A) Hill and Bendall

B) Emerson

C) Arnon

D) Rabinowitch and Govindjee

 

 91) Splitting of water in photosynthesis is called [RPMT 1985; MHCET 2001; Pb. PMT 2000,2004]

A) Dark reaction

B) Electron transfer

C) Photolysis

D) Phototropism

 

 92) Phtosynthetic unit is [MP PMT 2003]

A) Glyoxysome

B) Spherosome

C) Microsome

D) Quantasome

 

 93) The wavelength of light most absorbed during photosynthesis is [MP PMT 1998]

A) 440 nm

B) 550 nm

C) 660 nm

D) 700 nm

 

 94) Which one of the following elements is required for photosynthetic oxygen evolution [MP PMT 1998]

A) Copper

B) Iron

C) Manganese

D) Zinc

 

 95) Which pigment is present universally in all green plants [MP PMT 1999]

A) Chlorophyll-a

B) Chlorophyll-b

C) Chlorophyll-c

D) Chlorophyll-m

 

 96) Main pigment involved in transfer of electrons in photosynthesis is [CPMT 1998]

A) Cytochrome

B) Phytochrome

C) Both [a] and [b]

D) None of these

 

 97) In photosynthesis light energy is utilized in [CPMT 1998; MHCET 2003]

A) Converting ATP into ADP

B) Changing

CO2

into carbohydrate

C) Converting ADP into ATP

D) All of the above

 

 98) Which one of the following statements about cytochrome

P450

is wrong [CBSE PMT 1998]

A) It has an important role in metabolism

B) It contains iron

C) It is a coloured cell

D) It is an enzyme involved in oxidation reactions

 

 99)

P700

is a special form of which pigment [RPMT 1997]

A) Chlorophyll b

B) Carotenes

C) Chlorophyll a

D) Phycobilins

 

 100) In light reaction which is formed [RPMT 1999]

A) ATP

B) NADPH

C)

O2

D) All of these

 

 101) Which one of the following concerns photophosphorylation [CBSE PMT 1999]

A)

AMP+InorganicPO4−→−−−−−−LightenergyATP

B)

ADP+AMP−→−−−−−−LightenergyATP

C)

ADP+InorganicPO4−→−−−−−−LightenergyATP

D)

ADP+InorganicPO4→ATP

 

 102) Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higher plants [CBSE PMT 1999]

A) Violet and blue

B) Blue and green

C) Green and red

D) Red and violet

 

 103) Photosystem I and Photosystem II are found in [MP PMT 2001]

A) Stroma of chloroplast

B) Grana of chloroplast

C) Matrix of mitochondria

D) Inner membrane of mitochondria

 

 104) Number of chlorophyll arranged per reaction centre in the light harvesting complex are [Orissa JEE 2005]

A) 100

B) 200

C) 300

D) 400

 

 105) The light absorbed by the chlorophyll is at the wave length of [MP PMT 2002]

A) 400 nm

B) 500 nm

C) 600 nm

D) 660 nm

 

 106) Phytol chain is present in [Wardha 2005]

A) Carotenoids

B) Haemoglobin

C) Chlorophyll

D) Phycocyanin

 

 107)

O2

evolution is directly associated with [DPMT 2003; BVP 2004]

A) PS I

B) PS II

C) Phytochrome

D) Phycocyanin

 

 108) ATP formation in photosynthesis is known as [DPMT 1977; CPMT 1986, 98; NCERT 1986; MP PMT 1993]

A) Phosphorylation

B) Photophosphorylation

C) Oxidative phosphorylation

D) None of the above

 

 109) Hill reaction occurs in [AIIMS 2003]

A) High altitude plants

B) Total darkness

C) Absence of water

D) Presence of ferredoxin

 

 110) Plants adapted to low light intensity have [CBSE PMT 2004]

A) More extended root system

B) Leaves modified to spines

C) Larger photosynthetic unit size than the sun plants

D) Higher rate of

CO2

fixation than the sun plants

 

 111) Photosynthetically active radiation (PAR) represents the following range of wavelength [CBSE PMT 1996, 2005]

A) 340-450 mm

B) 400-700 mm

C) 500-600 mm

D) 450-950 mm

 

 112) Photolysis of water by isolated chloroplasts was demonstrated by [AIEEE 2004]

A) Robin Hill

B) Van Niel

C) Liebig

D) Calvin

 

 113) Non-cyclic photophosphorylation involves [MHCET 2002]

A) PS-I or PS-II

B) PS-I only

C) PS-II only

D) Stroma matrix

 

 114) The reaction centre is located in [MHCET 2002]

A) Chlorophyll 'b'

B) Carotene

C) Xanthophyll

D) Chlorophyll 'a'

 

 115) Cyclic photophosphorylation produces [MHCET 2004]

A)

NADPH

B)

ATP+NADPH

C)

ATP

D)

ATP+NADPH+O2

 

 116) In noncyclic photophosphorylation, the pigment molecule first excited is [MHCET 2004]

A)

P680

B)

P700

C) Chlorophyll-b

D) Xanthophyll

 

 117) The value of

Q10

for photosynthesis is

A) 4

B) 6

C) 7

D) 2

 

 118) ATP is produced during [MP PMT 2005]

A) Cyclic photosphosphorylation

B) None cyclic photosphosphorylation

C) Both

D) None

 

 119) In non-cyclic photophosphorylation, there are [Manipal 2005]

A)

24H+

B)

36H+

C)

12H+

D)

32H+

 

 120) The light energy passes in the form of

A) Photo ions

B) Photons

C) Photosomes

D) All the above

 

 121) Photophosphorylation differs from oxidative phosphorylation in

A) It takes place in light

B) ATP is formed

C) Cytochrome participates

D) All the above

 

 122) Which of the following occurs first in the light reaction

A) Oxidation of chlorophyll

B) Photolysis of water

C) Evolution of

ATP

and

O2

D) Production of

O2

and

NADPH2

 

 123) The radiation energy of light is converted to chemical energy and stored as [Orissa JEE 2005]

A) AMP

B) ADP

C) ATP

D) APP

 

 124) Photosynthesis of light reaction occur in [AMU 2005]

A) Only absence of light

B) Only present of light

C) Presence and absence of light

D) Absent of light in maximum intensity

 

 125) Which of the following method is responsible for ATP production by green plants cells in the presence of sunlight [AMU 2005]

A) By phosphorylation only

B) By oxidative phosphorylation only

C) By only substrate level phosphorylation

D) All of these