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Photosynthesis in Higher Plants

81 Questions Start NEET Test
All Exams NEET AIIMS
2010 Q51 NEET MCQ
10 Mar 2026
PGA as the first CO2 fixation product was discovered in photosynthesis of
A.
bryophyte
B.
gymnosperm
C.
angiosperm
D.
alga.
2009 Q52 NEET MCQ
10 Mar 2026
Stroma in the chloroplasts of higher plant contains
A.
light-dependent reaction enzymes
B.
ribosomes
C.
chlorophyll
D.
light-independent reaction enzymes.
2009 Q53 NEET MCQ
10 Mar 2026
Cyclic photophosphorylation results in the formation of
A.
ATP and NADPH
B.
ATP, NADPH and O2
C.
ATP
D.
NADPH.
2008 Q54 NEET MCQ
10 Mar 2026
The C4 plants are photosynthetically more efficient than C3 plants because
A.
the CO2 efflux is not prevented
B.
they have more chloroplasts
C.
the CO2 compensation point is more
D.
CO2 generated during photorespiration is trapped and recycled through PEP carboxylase.
2008 Q55 NEET MCQ
10 Mar 2026
In leaves of C4 plants malic acid synthesis during CO2 fixation occurs in
A.
bundle sheath
B.
guard cells
C.
epidermal cells
D.
mesophyll cells.
2008 Q56 NEET MCQ
10 Mar 2026
Electrons from excited chlorophyll molecule of photosystem II are accepted first by
A.
quinone
B.
ferredoxin
C.
cytochrome-b
D.
cytochrome-f.
2007 Q57 NEET MCQ
10 Mar 2026
In the leaves of C4 plants, malic acid formation during CO2 fixation occurs in the cells of
A.
bundle sheath
B.
phloem
C.
epidermis
D.
mesophyll.
2007 Q58 NEET MCQ
10 Mar 2026
The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is
A.
iron-sulphur protein
B.
ferredoxin
C.
quinone
D.
cytochrome.
2006 Q59 NEET MCQ
10 Mar 2026
In photosystem I, the first electron acceptor is
A.
an iron-sulphur protein
B.
ferredoxin
C.
cytochrome
D.
plastocyanin.
2006 Q60 NEET MCQ
10 Mar 2026
During photorespiration, the oxygen consuming reaction(s) occur in
A.
stroma of chloroplasts
B.
stroma of chloroplasts and mitochondria
C.
stroma of chloroplasts and peroxisomes
D.
grana of chloroplasts and peroxisomes.
2005 Q61 NEET MCQ
10 Mar 2026
As compared to a C3-plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by C4-plants?
A.
Two
B.
Six
C.
Twelve
D.
Zero
2005 Q62 NEET MCQ
10 Mar 2026
Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 levels because
A.
effective pumping of CO2 into bundle sheath cells
B.
RuBisCo in C4 plants has higher affinity for CO2
C.
four carbon acids are the primary intial CO2 fixation products
D.
the primary fixation of CO2 is mediated via PEP carboxylase.
2005 Q63 NEET MCQ
10 Mar 2026
Photosynthetic Active Radiation (PAR) has the following range of wavelengths.
A.
340-450 nm
B.
400-700 nm
C.
500-600 nm
D.
450-950 nm
2004 Q64 NEET MCQ
10 Mar 2026
Plants adapted to low light intensity have
A.
larger photosynthetic unit size than the sum plants
B.
higher rate of CO2 fixation than the sun plants
C.
more extended root system
D.
leaves modified to spines.
2004 Q65 NEET MCQ
10 Mar 2026
In C3 plants, the first stable product of photosynthesis during the dark reaction is
A.
malic acid
B.
oxaloacetic acid
C.
3-phosphoglyceric acid
D.
phosphoglyceraldehyde.
2003 Q66 NEET MCQ
10 Mar 2026
Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higher plants?
A.
Blue and green
B.
Green and red
C.
Red and violet
D.
Violet and blue.
2003 Q67 NEET MCQ
10 Mar 2026
Stomata of CAM plants
A.
are always open
B.
open during the day and close at night
C.
open during the might and close during the day
D.
never open.
2003 Q68 NEET MCQ
10 Mar 2026
Which one of the following concerns photophosphorylation?
A.
ADP + AMP $\buildrel {Light\,energy} \over \longrightarrow $ ATP
B.
ADP + Inorganic PQ4 $\buildrel {Light\,energy} \over \longrightarrow $ ATP
C.
ADP + Inorganic PQ4 $\buildrel \, \over \longrightarrow $ ATP
D.
AMP + Inorganic PQ4 $\buildrel {Light\,energy} \over \longrightarrow $ ATP
2003 Q69 NEET MCQ
10 Mar 2026
Which one of the following is wrong in relation to photorespiration?
A.
It occurs in chloroplast
B.
It occurs in day time only
C.
It is a characteristic of C4 plants
D.
It is a characteristic of C3 plants.
2003 Q70 NEET MCQ
10 Mar 2026
Which element is located at the centre of the porphyrin ring in chlorophyll?
A.
Calcium
B.
Magnesium
C.
potassium
D.
Manganese
2003 Q71 NEET MCQ
10 Mar 2026
In sugarcane plant 14CO2 is fixed to malic acid, in which the enzyme that fixes CO2 is
A.
ribulose biphosphate carboxylase
B.
phosphoenal pyruvic acid carboxylase
C.
ribulose phosphate kinase
D.
fructose phosphate.
2002 Q72 NEET MCQ
10 Mar 2026
In photosynthersis energy from light reaction to dark reaction is transferred in the form of
A.
ADP
B.
ATP
C.
RuDP
D.
chlorophyll.
2002 Q73 NEET MCQ
10 Mar 2026
Which pigment absorbs the red and far-red light?
A.
Cytochrome
B.
Phytochrome
C.
Carotenoids
D.
Chlorophyll.
2002 Q74 NEET MCQ
10 Mar 2026
Which of the following absorb light energy for photosynthesis?
A.
Chlorophyll
B.
Water molecule
C.
O2
D.
RuBP
2001 Q75 NEET MCQ
10 Mar 2026
What is true for photolithotrophs?
A.
Obtain energy from radiations and hydrogen from organic compounds
B.
Obtain energy from radiations and hydrogen from inorganic compounds
C.
Obtain energy from organic compounds
D.
Obtain energy from inorganic compounds
2001 Q76 NEET MCQ
10 Mar 2026
Which pigment system is inactivated in red drop?
A.
PS-I and PS-II
B.
PS-I
C.
PS-II
D.
None of the above
2001 Q77 NEET MCQ
10 Mar 2026
Which pair is wrong?
A.
C3-maize
B.
C4-kranz anatomy
C.
Calvin cycle-PGA
D.
Hatch and Slack cycle - OAA
2000 Q78 NEET MCQ
10 Mar 2026
Which is the first CO2 acceptor enzyme in C4 plants?
A.
RuDP carboxylase
B.
Phosphoric acid
C.
RuBisCO
D.
PEP- carboxylase
2000 Q79 NEET MCQ
10 Mar 2026
For the synthesis of one glucose molecule the Calvin cycle operates for
A.
2 times
B.
4 times
C.
6 times
D.
8 times
2000 Q80 NEET MCQ
10 Mar 2026
The first step for initiation of photosynthesis will be
A.
photolysis of water
B.
excitement of chlorophyll molecules due to absorption of ligtht
C.
ATP formation
D.
glucose formation
2000 Q81 NEET MCQ
10 Mar 2026
For assimilation of one CO2 molecule, the enerrgy required in from of ATP and NADPH2 are
A.
2 ATP and 2 NADPH2
B.
5 ATP and 3 NADPH2
C.
3 ATP and 2 NADPH2
D.
18 ATP and 12 NADPH2.