141.
During the dark reaction of photosynthesis
A
Water splits
B
CO2 is reduced to organic compounds
C
Chlorophyll is activated
D
C6 - sugar is broken into three carbon sugars
Answer :
CO2 is reduced to organic compounds
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142.
Electrons from excites chlorophyll molecule of phtosystem II are accepted first by
A
Quione
B
Ferredoxin
C
Cytochrome - b
D
Cytochrome - f
Answer :
Quione
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143.
In chlorophyll molecule "Mg" is situated in
A
Centre of porphyring ring
B
Corner of porphyrin
C
In phytol tail
D
In isocyclic ring
Answer :
Centre of porphyring ring
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144.
Generally atomo. CO2 is not limiting for hydrophytes
A
Mesophytes plants fix H2S in their photosynthesis
B
These plants obtain CO2 from water in the form of HCO-3
C
Glucose is not required for their respiration
D
All of the above
Answer :
These plants obtain CO2 from water in the form of HCO-3
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145.
Leaves appear green because
A
They absorb green light
B
They reflet green light
C
They absorb & reflect green light
D
They absorb green & reflects white light
Answer :
They reflet green light
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146.
Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higher plants?
A
Violet and blue
B
Blue and green
C
Green and red
D
Red and violet
Answer :
Violet and blue
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147.
Cyclic photophosphorylation results in the formation of
A
ATP and NADPH
B
ATP, NADPH and O2
C
ATP
D
NADPH
Answer :
ATP
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148.
In light reaction of photosynthesis oxygen is come from
A
Water
B
CO2
C
Soil
D
Atmosphere
Answer :
Water
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149.
The number of pigment molecules in quantasome is
A
250 - 400
B
300 - 900
C
500 - 600
D
50 - 100
Answer :
250 - 400
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150.
Plants which exhibit photorespiration are
A
C4 plants
B
C3 plants
C
CAM plants
D
Alpine plants
Answer :
C3 plants
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