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Neet Botany Photosynthesis Mcq
Quiz 13
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Q.1
It is advantageous to use a water plant to demonstrate photosynthesis other than a land plant because.
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a) it photosynthesize rapidly
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b) it respires slowly
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c) it does not transpire
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d) O2 bubbles from cut and can be collected over H2O.
Explanation
Answer:(d)
Q.2
For synthesis of one gram of hexose, the land plant consumes.
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a) Only 1/3 of the CO2 of air
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b) Only 1/4 of the CO2 of air
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c) Only 2/3 of the CO2 of air
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d) none of the above
Explanation
Answer:(b)
Q.3
Match Column – I with given under Column – II ; choose the answer which gives correct combination:
Column – I(Scientists)
Column – II(Contributions)
P. A pigment which absorbs red and far-red light
(i) Cytochrome
Q. Main pigment involved in transfer of electrons in
(ii) PEP carboxylase photosynthesis is
R. NADPH2 is generated through....
(iii) Photochrome
S. Enzyme which fixes CO2 in C4 plants
(iv) Photosystems
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a) P = (i), Q = (ii), R = (iii), S = (iv)
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b) P = (iii), Q = (i), R = (iv), S = (iii)
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c) P = (iii), Q = (ii), R = (iii), S= (i)
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d) P = (i), Q = (ii), R = (iv), S = (iii)
Explanation
Answer:(b)
Q.4
In C4 plants, the bundle sheath cells.
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a) have thin walls to facilitate gaseous exchange
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b) have large intercellular spaces
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c) are rich in PEP carboxylase
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d) have a high density of chloroplasts
Explanation
Answer:(d)
Q.5
In young leaves ratio of carotene to Xanthophyll is ____.
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a) 2 : 1
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b) 3: 1
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c) 1: 3
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d) 1: 2
Explanation
Answer:(d)
Q.6
Quantum yield of photosynthesis is ______.
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a) 13.5 %
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b) 8 %
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c) 13%
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d) 12.5%
Explanation
Answer:(d)
Q.7
The ionized chl.a+
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a) Receives low energy electron
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b) Receives high energy electron
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c) Expels low energy electron
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d) Expels high energy electron
Explanation
Answer:(a)
Q.8
In chrophyll structure Phytol tail is present at
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a) 3rd carbon of IInd ring
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b) 2nd carbon of IIIrd ring
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c) 7th carbon of IVth ring
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d) 3rd carbon of IVth ring
Explanation
Answer:(c)
Q.9
The volume of O2 librated in photosynthesis has the following ratio to CO2.
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a) O2/CO2 = 1
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b) O2/CO2 = 1/2
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c) O2/CO2 = 2/1
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d) O2/CO2 = 3/1
Explanation
Answer:(a)
Q.10
Match the following with correct combination
P. Carboxylation
(i). Oxygen evolution
Q. Phosphorylation
(ii) Photorespiration
R. Photolysis of water
(iii) Rubisco
S. Phosphoglycolate
(iv) Chemosynthesis
T. Nitrosomonas
(v)ATP
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a) P = (i) Q = (ii) R = (iii) S = (iv) T = (v)
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b) P = (iii) Q = (v) R = (i) S = (ii) T = (iv)
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c) P = (i) Q = (iii) R = (v) S = (iv) T = (i)
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d) P = (i) Q = (iii) R = (iv) S = (ii) T = (v)
Explanation
Answer:(b)
Q.11
The approximate dimension of chlorophyll porphyrin ring is.
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a) 1 Å square
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b) 5 Å square
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c) 10 Å square
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d) 15 Å square
Explanation
Answer:(d)
Q.12
RUBISCO enzyme is also called as ______.
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a) carboxy tetra mutase
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b) carboxy di mutase
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c) carboxy tri mutase
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d) carboxy uni mutase
Explanation
Answer:(b)
Q.13
Intensity of light increase 20 times, rate of photosynthesis will
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a) increase
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b) not increase
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c) decrease
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d) increase till feed back inhibition.
Explanation
Answer:(d)
Q.14
If a photosynthsing plant releases O18 , it is concluded that the plant has been supplied with
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a) Water containing O18
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b) Oxygen in the form of ozone
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c) Sugar containing O18
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d) Carbon dioxide containing O18
Explanation
Answer:(a)
Q.15
In con-cyclic photophosphorylation, the electron emitted by P680 is replaced by electron from
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a) NADP
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b) Water
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c) Ferridoxin
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d) Chlorophyll-a
Explanation
Answer:(b)
Q.16
In sugarcane plant CO2 is fixed in malic acid, in which the enzyme that fixes CO2 is
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a) ribulose biphosphate carboxylase
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b) phosphoenol pyruvic acid carboxylase
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c) ribolose phosphate kinase
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d) fructose phosphatase
Explanation
Answer:(b)
Q.17
Who gave chemical compositions of chlorophyll and carotenoids ?
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a) Park and Biggins
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b) Meyers and French
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c) Willstatter and Stahi
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d) Arnon and Benson
Explanation
Answer:(c)
Q.18
The Calvin cycle proceeds in three stagesreduction, during which carbohydrate is formed at the expense of the photochemically made ATP and NADPHregeneration, during which the carbon dioxide acceptor ribulose – 1, 5 – biphosphate is formedcarboxylation, during which carbon dioxide combines with ribulose – 1, 5 - biophosphate
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a) 3-1-2
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b) 3-2-1
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c) 1-2-3
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d) 2-1-3
Explanation
Answer:(a)
Q.19
Calvin cycle utilize for fixation of 3 molecules of CO2
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a) 9 ATP and 6 NADPH2
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b) 8 ATP and 8 NADPH2
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c) 9 ATP and 3 NADPH2
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d) 6 ATP and 6 NADPH2
Explanation
Answer:(a)
Q.20
During dark phase of photosynthesis ______ is oxidized and ______ is reduced
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a) CO2 and Water
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b) Water and CO2
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c) Water and NADP
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d) NADPH2 and CO2
Explanation
Answer:(d)
Q.21
Chlorophyll molecules absorb light energy of wavelength
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a) 300-400 nm
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b) 400-500 nm
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c) 600-800 nm
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d) 400-500 nm and 600-700 nm
Explanation
Answer:(a)
Q.22
Calvin cycle represents one of the following phenomenon.
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a) oxidative carboxylation
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b) dark phosphorylation
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c) dark respiration
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d) reductive carboxylation
Explanation
Answer:(d)
Q.23
To produce 3 glucose molecules ______ ATP and ______ NADPH2 molecules are required.
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a) 54, 36
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b) 54, 30
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c) 36, 60
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d) 18, 12
Explanation
Answer:(a)
Q.24
In Blackmann’s ‘Law of Limiting Factors’ the rate of photosynthesis continues to increase with the successive increase in the amounts of
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a) carbon dioxide, light, temperature
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b) temperature, light, carbon dioxide
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c) light, temperature, carbon dioxide
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d) light, carbon dioxide, temperature
Explanation
Answer:(a)
Q.25
Red pigment in tomato is
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a) β-carotene
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b) Anthocyanin
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c) Lycopene
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d) Lutein
Explanation
Answer:(c)
Q.26
Which of the following gas would disappear from the atmosphere if all the photosynthetic activities were to stop?
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a) Nitrogen
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b) Carbondioxide
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c) Hydrogen
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d) Oxygen
Explanation
Answer:(d)
Q.27
Primary and secondary processes of Photosynthesis takes place in ______ and ______ respectively.
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a) Stroma and grana
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b) Stroma and lamellae
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c) Thylakoid and quantasome
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d) Grana and stroma
Explanation
Answer:(d)
Q.28
Action spectrum is
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a) A graph showing amount of light absorbed
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b) A graph showing rate of photosynthesis
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c) A graph showing absorption of light
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d) A graph showing amount of CO2 released
Explanation
Answer:(b)
Q.29
All plastids have essentially same structure because
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a) They have to perform same function
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b) They are localized in aerial parts of plants
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c) All plastids store starch, lipid and proteins
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d) One type of plastid can be differentiated into another type of plastid depending on cell requirements
Explanation
Answer:(d)
Q.30
In the calvin cycle, the assimilatory power is used during
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a) Formation of PGA
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b) Conversion of PGA to PGAL
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c) Formation of fructose 1-6 diphsophate from PGAL
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d) Formation of glucose from fructose – di- phosphate
Explanation
Answer:(b)
0 h : 0 m : 1 s
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