CBSE Questions for Class 11 Medical Biology Photosynthesis In Higher Plants Quiz 8 - MCQExams.com

The movement of ten electrons from mitochondrial NADH$$_2$$ molecules produces ____ water molecules.
  • 20
  • 15
  • 10
  • 5
Chemiosmotic hypothesis given by Peter Mitchell proposes the mechanism of
  • Synthesis of ATP.
  • Synthesis of FADH$$_2$$.
  • Synthesis of NADH.
  • Synthesis of NADPH.
Carbon dioxide joins the photosynthetic pathway in
  • PS I
  • PS II
  • Light reaction
  • Dark reaction
The $$C_4$$-plants are different from the $$C_3$$-plants with reference to the
  • The substance that accepts $$CO_2$$ in carbon assimilation.
  • Types of end product of photosynthesis.
  • The number of NADPH that are consumed in preparing sugar.
  • Types of pigments involved photosynthesis.
Formation of ATP in photosynthesis and respiration is an oxidation process which utilises the energy from
  • Cytochromes
  • Ferredoxin
  • Electrons
  • Carbon dioxide.
Pigment acting as a reaction centre during photosynthesis is
  • Carotene
  • Phytochrome
  • Chlorophyll a of $$P_{700}$$
  • Cytochome.
Which one of the following is the common product of both respiration and photosynthesis?
  • ATP
  • Quinone
  • Cytochrome
  • Chlorophyll
Maize, Sugarcane and some other tropical plants have high efficiency of $$CO_2$$ fixation because they operate
  • Calvin cycle
  • Hatch-Slack cycle
  • TCA cycle
  • PP pathway
Which one of the following does not perform $$C_4$$ photosynthesis?
  • Saccharum
  • Zea mays
  • Triticum aestivum (=T. vulgare)/Crotalaria)
  • Euphorbia milli (=E. splendens).
Organelles having enzymes involved in photorespiration are
  • Mitochondria, chloroplasts and ribosomes
  • Mitochondria, peroxisomes and chloroplasts
  • Mitochondria, nucleus and ribosomes
  • Mitochondria, peroxisomes and glyoxysomes.
Photorespiration occurs in
  • Ribosomes
  • Mitochondria
  • Peroxisomes
  • Both B and C
Synthesis of $$ADP + Pi \longrightarrow ATP$$ in grana/photosynthesis is
  • Phosphorylation
  • Photophosphorylation
  • Oxidative phosphorylation
  • Photolysis
In $$C_4$$ plants, Calvin cycle operates in
  • Stroma of bundle sheath chloroplasts
  • Grana of bundle sheath chloroplasts
  • Grana of mesophyll chloroplasts
  • Stroma of mesophyll chloroplasts.
For synthesis of a molecule of glucose, the requirement of ATP and NADPH is respectively
  • 15 and 10
  • 33 and 22
  • 12 and 8
  • 18 and 12.
$$C_4$$ plants belong to
  • Gramineae
  • Monocots
  • Dicots
  • Both monocots and dicots
Sugarcane shows high efficiency of $$CO_2$$ fixation because it performs
  • Calvin cycle
  • EMP pathway
  • Hatch and Slack pathway
  • TCA cycle
Path of dark reaction of photosynthesis was traced through the use of
  • $$^{32}$$P
  • $$^{14}$$CO$$_2$$
  • $$^{18}$$O$$_2$$
  • X-rays
First product of photorespiration is
  • Phosphoglycolate
  • Glycolate
  • Glycine
  • None of the above
$$C_4$$ cycle was discovered in
  • Groundnut
  • Sugarcane
  • Chrysanthemum
  • Apple
Non-cyclic photophosphorylation is performed by
  • Dark reaction
  • PS I
  • PS II
  • Both B and C
$$C_4$$ cycle is
  • Adjunct to Calvin cycle
  • Independent cycle
  • With high RuBP carboxylase efficiency
  • With PEP carboxylase in bundle sheath cells
$$C_4$$ cycle is connected with
  • Respiration
  • Photosynthesis
  • Transpiration
  • Growth and development
Balance between $$CO_2$$ and $$O_2$$ is maintained by
  • Transpiration
  • Photosynthesis
  • Photorespiration
  • $$C_4$$ pathway.
Which one is a $$C_4$$ plant
  • Maize
  • Sugarcane
  • Sorghum
  • All of the above.
$$C_4$$ plants differ from $$C_3$$ plants with respect to
  • First product
  • Substrate which accepts carbon dioxide
  • Number of ATP molecules consumed
  • All of the above
$$C_4$$ plants have higher net photosynthetic rate as they have
  • No photorespiration
  • PEP as $$CO_2$$ acceptor
  • Kranz anatomy
  • Photosynthesis even at low light intensity.
Photorespiration is affected by
  • Temperature
  • Light intensity
  • $$CO_2$$ and $$O_2$$
  • All of the above
$$C_4$$ pathway of $$CO_2$$ fixation was discovered by
  • Blackman
  • Hatch and Slack
  • Emerson and Arnold
  • Arnon
Primary carboxylation occurs in $$C_3$$ and $$C_4$$ plants with the help of
  • PEP carboxylase and pyruvate carboxylase
  • PEP carboxylase and RuBP carboxylase
  • RuBP carboxylase and PEP carboxylase
  • RuBP carboxylase and pyruvate carboxylase.
$$C_4$$ plants differ from $$C_3$$ plants in
  • Number of ATPs consumed per hexose molecule
  • Type of end product
  • Type of pigments
  • Substrate for $$CO_2$$ in carbon assimilation.
Which one of the following contain agranal chloroplasts?
  • $$C_3$$ plants
  • Succulents
  • $$C_4$$ plants
  • Hydrophytes
RuBisCO content of chloroplast is atleast 
  • 20%
  • 5%
  • 11%
  • 16%
ATP formation in chloroplast and mitochondrion is explained by
  • Cholodny-Went model
  • Chemi-osmotic theory of Mitchell
  • Munch's mass flow theory
  • Relay pump theory of Godlewski
Special feature of $$C_4$$ plants is
  • Thin cuticle
  • Multilayered epidermis
  • Kranz anatomy
  • Both A and B
Condition favouring cyclic photophosphorylation is
  • Anaerobic environment
  • Aerobic and low light intensity
  • Aerobic and optimum light
  • Anaerobic and low light intensity
In $$C_3$$ plants, first carbon dioxide acceptor enzyme is
  • PEPCO
  • RuBP carboxylase/Rubisco
  • RuBP oxygenase
  • Oxidase.
First stable product of $$C_4$$/HSK photosynthesis is
  • Phosphoglyceric acid
  • Ribulose 1, 5-biphosphate
  • Malic acid
  • Phosphoglyceraldehyde.
Scientist awarded Nobel Prize in 1960 for tracing the path of carbon in photosynthesis was
  • Hatch
  • Huber
  • Calvin
  • Ruben
ATP molecules required to synthesise one molecule of glucose by $$C_4$$ pathway are
  • 12
  • 18
  • 24
  • 30
Carbon dioxide is fixed in
  • Light reaction
  • Dark reaction
  • Aerobic respiration
  • Anaerobic respiration
Anatomy of C$$_4$$ plant leaf shows
  • Presence of peroxisomes
  • Presence of bundle sheath cells
  • Absence of mitochondria
  • Absence of bundle sheath cells
In Maize, mesophyll cells perform photosynthetic cycle
  • $$C_4$$
  • $$C_3$$
  • $$C_2$$
  • $$C_1$$.
Which of the following is a $$C_4$$ plant?
  • Sugarcane
  • Tomato
  • Mango
  • Apple
Ferredoxin is
  • Phenol
  • Protein
  • Fat
  • Carbohydrate
Non-cyclic photophosphorylation involves
  • PS I only
  • PS II only
  • Stroma matrix
  • Both A and B
Which one is a $$C_4$$ plant?
  • Potato
  • Mustard
  • Onion
  • Wheat
$$C_4$$ and $$C_3$$ pathways of CAM plants are separated by
  • Bundle sheath
  • Mesophyll and bundle sheath cells
  • Mesophyll and bundle sheath chloroplasts
  • Time
In photosynthetic electron transport system, Mn ions are associated with
  • $$CF_0 - CF_1$$ complex
  • Cyt $$b_6$$ - Cyt f complex
  • Oxygen evolving complex
  • Plastoquinone.
The sequential order in electron transport from PS II to PS I of photosynthesis is
  • FeS, PQ, PC and Cytochrome
  • FeS, PQ. Cytochromes and PC
  • PQ, Cytochromes, PC and FeS
  • PC, Cytochromes, FeS, PQ
PEP, the first $$CO_2$$ acceptor in $$C_4$$ cycle is
  • 3-C compound
  • 4-C compound
  • 5-C compound
  • 6-C compound.
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