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CBSE Questions for Class 11 Medical Biology Photosynthesis In Higher Plants Quiz 9 - MCQExams.com

Which of the following pair is wrong?
  • C3 - Maize
  • Calvin cycle PGA
  • Hatch and Slack cycle OAA
  • C4 - Kranz anatomy
Which of the following does not take part in the electron transfer?
  • CoQ
  • FeS
  • ATP
  • NAD+
Steps in non-cyclic photophosphorylation include passage of electrons along
  • FRS FD Cyt b6 Cyt f PC Chl a
  • Chl a Cyt b6 Cyt f PC PS I FRS FD
  • ChI a PQ Cyt b6 Cyt f PC PS I FRS FD
  • PQ Cyt b6 Cyt f PC PS I FRS FD.
The compound formed as net gain in carbon assimilation is
  • 3-C DHAP of third CO2- fixation
  • GAP of second CO2 fixation
  • Erythrose 4-phosphate reacting with DiHAP
  • RuBP
ETC of photosynthesis process is
  • Bound to thylakoid membrane
  • Present in stroma
  • Bound to outer chloroplast membrane
  • Dispersed in cytosol
In Sugarcane, 14CO2 is fixed in malic acid. The enzyme is
  • RuBP carboxylase
  • PEP carboxylase
  • Ribulose phosphate kinase
  • Fructose phosphatase
In C4 pathway, CO2 fixation in mesophyll cells is carried out by the enzyme
  • PEP carboxylase
  • Pyruvate dehydrogenase
  • RuBisCO
  • Pyruvate decarboxylase
Which of the following is true?
  • PEP-pyruvate causes substrate level phosphorylation.
  • PS II has oxygen producing complex.
  • NADPH is assimilatory power.
  • All of the above.
In photosynthesis, energy for passage of electron is the one that is absorbed by
  • Chlorophyll
  • RuBP
  • Water
  • ATP.
The characteristics of C4 plants are
(a) Kranz anatomy 
(b) First product is oxaloacetic acid 
(c) Carboxylating enzymes are PEP carboxylase and RuBisCO
  • a and b but not c
  • b and c and not a
  • a and c but not b
  • All a, b and c
Which one is wrong with respect to photorespiration?
  • It occurs in chloroplasts
  • It occurs in day time only
  • It is characteristic of C4 plants
  • It is characteristic of C3 plants
Basic feature of Kranz anatomy of C4 plants is
  • Presence of chloroplasts in bundle sheath cells
  • Presence chloroplasts in mesophyll and epidermal cells
  • Presence of typical granal chloroplasts in bundle sheath cells and rudimentary chloroplasts in mesophyll cells
  • Presence of rudimentary chloroplasts in bundle sheath cells and typical granal chloroplasts in misophyll cells
Plants showing C4 photosynthesis have
  • Granal bundle sheath chloroplasts and agranal mesophyll chloroplasts
  • Agranal bundle sheath chloroplasts and granal mesophyll chloroplasts
  • Both bundle sheath and mesophyll chloroplasts are agranal
  • Both the types of chloroplasts are granal
Which one is photophosphorylation?
  • ADP + AMP Lightenergy ATP
  • ADP + Inorganic phosphate Lightenergy ATP
  • ADP + Inorganic PO4 ATP
  • AMP + Inorganic PO4 Lightenergy ATP
ADP ATP reaction occurs when two protons (H+) are passed from
  • Thylakoid to cytosol
  • Thylakoid to lumen
  • Lumen of thylakoid to stroma
  • Stroma to thylakoid lumen
Photorespiration involves oxidation of
  • Chlorophyll a
  • PGA
  • RuBP
  • Both B and C
Match the columns and find the correct combination.

III
aCarboxylationiOxygen evolution
bPhosphorylationiiPhotorespiration
cPhotolysis of wateriiiRubisco
dPhosphoglycolateivChemosynthesis
eNitrosomonasvATP
  • a-i, b-ii, c-iii, d-iv, e-v
  • a-iii, b-v, c-i, d-ii, e-iv
  • a-ii, b-iii, c-v, d-iv, e-i
  • a-i, b-iii, c-iv, d-ii, e-v
  • a-v, b-iv, c-iii, d-ii, e-i.
Respiration initiated in chloroplasts and occurring in light is called
  • Aerobic respiration
  • Anaerobic respiration
  • Fermentation
  • Photorespiration
Rubisco is enzyme for
  • Regeneration of RuBP
  • Photolysis of water
  • CO2 fixation
  • All of the above
How many molecules of glycine are required to release one molecule of CO2 in photorespiration?
  • One
  • Two
  • Three
  • Four
Which one is a CAM plant?
  • Maize
  • Pineapple
  • Onion
  • Pea
Non-cyclic photophosphorylation produces
  • NAD+
  • NADH
  • NADPH
  • NADP+
Choose the correct statement
  • C4 plants do not have Rubisco
  • Carboxylation of RuBP leads to the formation of PGA and phosphoglycolate
  • Carboxylation of phosphoenol pyruvate results in the formation of C4 acids
  • Carboxylation of C4 acids occur in mesophyll cells
Which one has Kranz anatomy?
  • Maize/sugarcane
  • Wheat
  • Rice
  • Potato
As compared to C3 plants, how many additional molecules of ATP are needed for the net production of one molecule of hexose sugar by C4 plants?
  • Two
  • Six
  • Twelve
  • Zero
ATP synthetase of chloroplasts is similar to that of
  • Mitochondria
  • Peroxisomes
  • Golgi bodies
  • Microsomes.
Chloroplasts without grana are found in
  • Bundle sheath cells of C3 plants
  • Bundle sheath cells of C4 plants
  • Mesophyll cells of all plants
  • Mesophyll cells of C4 plants
Which of the following statements is true with regard to the light reaction of photosynthetic mechanism in plants ?
  • Chlorophyll a occurs with peak absorption at 680 nm in photosystem I and 700 nm in phtosystem II.
  • Magnesium and sodium ions are associated with photolysis of water molecules.
  • O2 is evolved during cyclic photo-phosphorylation.
  • Photosystem I and photosystem II are both involved in non-cyclic photophosphorylation.
Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 because
  • Effective pumping of CO2 into bundle sheath cells
  • Rubisco in C4 plants has higher affinity for CO2
  • Four carbon acids are primary initial CO2 fixation products
  • Primary fixation of CO2 is mediated via PEP carboxylase
C4 plant shows efficiency even in
  • Low concentration of CO2
  • Low temperature
  • High CO2 concentration
  • At low water availability.
NAD+ is reduced in photorespiration inside
  • Mitochondria
  • Mitochondria and peroxisome
  • Mitochondria and chloroplasts
  • Chloroplasts and peroxisomes.
Carbon assimilation occurs in bundle sheath cells of
  • CAM plants
  • C4 plants
  • C3 plants
  • All of the above
In photorespiration, peroxisome helps in
  • Synthesis of PGA
  • Reduction of glyoxylate
  • Oxidation of glycolate
  • Oxygenation of glycolate
What is true about compensation point in C3 and C4 plants?
  • Compensation point of C3 plants is higher.
  • Compensation point of C4 plants is higher.
  • It is equal.
  • None of these as it is variable.
HSK pathway is also known as
  • C3 cycle
  • C4 cycle
  • C2 cycle
  • None of the above
In non-cyclic photophosphorylation, PS I is reduced by
  • Electron from PS II
  • Electron from ferredoxin
  • Hydrogen from water
  • Hydrogen from PS II
Which of the following statements are true?
(a) In C4 plants, primary CO2 acceptor is PEP.
(b) PS II absorbs energy at or just below 680 nm.
(c) PS I has P683.
  • a and c
  • a
  • a and b
  • c
Ammonia is produced during
  • Photorespiration
  • CAM
  • Dark respiration
  • All of the above
Photorespiration is not detectable in
  • C3 plants
  • C4 plants
  • Both A and B
  • None of the above
C4 plants are photosynthetically more efficient than C3 plants because
  • CO2 efflux is not prevented
  • They are able to avoid photorespiration
  • CO2 compensation point is more
  • CO2 generated during photorespiration is recycled through PEP carboxylase.
In C4 plants, bundle sheath cells have
  • Thin wall for gaseous exchange
  • Rich PEP carboxylase
  • High density of chloroplasts
  • Large intercellular spaces
Enzyme responsible for primary carboxylation in C4 plants is
  • PEP carboxylase
  • Succinic dehydrogenase
  • RuBP carboxylase oxygenase
  • Hexokinase
Molecules of RuBP required to produce 20 molecules of serine in photorespiration are
  • 60
  • 40
  • 20
  • 80
Enzymes RuBP carboxylase-oxygenase and PEP carboxylase are activated by
  • Zn
  • Mo
  • Mn
  • Mg
Non-cyclic electron flow in chloroplast/light reaction results in production of
  • ATP
  • ATP and NADPH
  • ATP, NADPH, O2
  • NADPH
Which of the following statements regarding C4 plants is false?
  • The primary CO2 acceptor is a 5-carbon molecule.
  • The initial carboxylation reaction occurs in mesophyll.
  • Calvin pathway does not take place in the mesophyll cells but does so only in bundle sheath cells.
  • Leaves that fix CO2 have two cell types.
Which of the following statement is correct for C4 plants?
  • Light phase occurs in bundle sheath cells
  • CO2 fixation occurs in mesophyll cells
  • Light phase occurs in mesophyll cells
  • Photorespiration occurs in mesophyll cells
Study the pathway given above.
In which of the following options correct words for all the three blanks a, b and c are indicated.
665927_64a3668b558f4826a782e6e7eebd68b8.JPG
  • a - Decarboxylation, b - Reduction, c - Regeneration
  • a - Fixation, b - Transamination, c - Regeneration
  • a - Fixation, b - Decarboxylation, c - Regeneration
  • a - Carboxylation, b - Decarboxylation, c - Reduction
In which type of reactions related to plant photosynthesis, peroxisomes are involved?
  • Glycolytic cycle
  • Calvin cycle
  • Bacterial photosynthesis
  • Glyoxylate cycle
Which of the following is not related to photorespiration?
  • Peroxisomes
  • Lysosomes
  • Mitochondria
  • Chloroplasts
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