161.
What is photosynthetic quotient
A
O2/CO2
B
CO2/O2
C
O2/Starch
D
Water/starch
Answer :
O2/CO2
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162.
In C3 plants, the first stable product of ] photosynthesis during the dark reaction is
A
Phosphoglycereldehyde
B
Malic acid
C
Oxaloacetic acid
D
3-phosphoglyceric acid
Answer :
3-phosphoglyceric acid
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163.
The excess energy of e- (in ETS) is used in the synthesis of
A
ATP from ADP & - ip
B
NADPH2 from NADP
C
Organic compounds
D
ADP from ATP
Answer :
ATP from ADP & - ip
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164.
Our present day view regarding photosynthetic is that
A
Converts light energy into chemical energy
B
Creates useful energy
C
Fixes CO2 into carbohydrates
D
Reverses the action of respiration
Answer :
Converts light energy into chemical energy
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165.
Which one occurs both during cyclic and noncyclic modes of photophosphorylation?
A
Involvement of both PS I and PS II
B
Formation of ATP
C
Release of $${O_2}$$
D
Formation of NADPH
Answer :
Formation of ATP
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166.
The role of chlorophyll in photosynthesis is
A
Absorption of CO2
B
Absorption of light
C
Absorption of light and photochemical decomposition of water
D
Absorption of water
Answer :
Absorption of light and photochemical decomposition of water
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167.
Which step of non cyclic photophosphorylation is blocked by DCMU
A
Flow of e- between PS I to Fd
B
Flow of e- between cyto b6 to cyto f
C
Flow of e- between PC to PS I
D
Flow of e- between PS II to PQ
Answer :
Flow of e- between PS II to PQ
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168.
Photoxidation of water in photosynthesis is in association of
A
Cytochrome b6
B
Pigment system-I
C
Pigment system -II
D
Plastocynain
Answer :
Pigment system -II
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169.
Which one of the following statements about cytochrome P-450 is wrong?
A
It contains iron
B
It is an enzyme involved in oxidation reaction
C
It is a coloured cell
D
It has an important role in metabolism
Answer :
It is a coloured cell
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170.
Which enzyme is most abudantly found on earth?
A
Catalase
B
Rubisco
C
Nitrogenase
D
Invertase
Answer :
Rubisco
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