CBSE Questions for Class 11 Medical Biology Photosynthesis In Higher Plants Quiz 1 - MCQExams.com

Photophosphorylation results in the formation of 
  • ATP
  • NADPH + H$$^+$$
  • $$C_6H_{12}O_6$$
  • Glucose
Number of Calvin cycles required to generate a molecule of hexose is
  • 2
  • 4
  • 6
  • 8
The first stable product of photosynthesis in $$C_ 3$$ plants is
  • 3- phosphoglyceric acid
  • Dihydroxyacetone phosphate
  • Fructose-1, 6- diphosphate
  • Ribulose-1, 5- diphosphate
Kranz anatomy is an exceptional feature of
  • C4 plants
  • CAM plants
  • All green plants
  • All lower plants
Photorespiration occurs in
  • Green photosynthetic parts
  • All living cells
  • Mitochondria
  • Root
Which of the following statements is correct?
  • Photorespiration is useful process.
  • C$$_4$$ plants are more efficient than C$$_3$$ plants.
  • C$$_3$$ plants are more efficient than C$$_4$$ plants.
  • Photorespiration is absent in C$$_3$$ plants but present in C$$_4$$ plants.
Which of the following is the site for the Calvin cycle of photosynthesis?
  • Stroma
  • Thylakoid
  • Vacuole
  • Stomata
  • Lamella
The site for Calvin cycle is the
  • Stroma.                                                                 .
  • Cytoplasm.
  • Thylakoid membrane.
  • Mitochondrial matrix.
  • Mitochondrial membrane.
Which of the following is incorrect regarding $$C_{4}$$ pathway?
  • It requires more energy than the $$C_{3}$$ pathway for production of glucose.
  • It overcomes loss due to photorespiration.
  • The first formed stable compound is a 3 carbon compound, i.e., oxaloacetic acid.
  • It is inhibited by high $$CO_{2}$$ concentration.
Kranz anatomy is one of the characteristics of the leaves of
  • Mustard
  • Potato
  • Wheat
  • Sugarcane
In Kranz anatomy, the bundle sheath cells have
  • Thin walls, many intercellular spaces and no chloroplasts.
  • Thick walls, no intercellular spaces and a large number of chloroplasts.
  • Thin walls, no intercellular spaces and several chloroplasts.
  • Thick walls, many intercellular spaces and few chloroplasts.
The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of:
  • 1 molecule of 3-C compound
  • 1 molecule of 6-C compound
  • 1 molecule of 3-C compound and 1 molecule of 2-C compound
  • 2 molecules of 3-C compound
A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rate of photosynthesis at high temperature and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant?
  • $$C_3$$
  • $$C_4$$
  • CAM
  • Nitrogen fixer
In light reaction, plastoquinone facilitates the transfer of electrons from
  • $$Cytb_6f$$ complex to $$PS-I$$
  • $$PS-I$$ to $$NADP^+$$
  • $$PS- I$$ to $$ATP$$ synthase
  • $$PS-II$$ to $$Cytb_6f$$ complex
Anoxygenic photosynthesis is characteristic of
  • Rhodospirillum
  • Spirogyra
  • Chlamydomonas
  • Ulva
Study the pathway given above. In which of the following options, correct words for all the three blanks A, B, and C are indicated?
ABC
1CarboxylationDecarboxylationReduction 
2DecarboxylationReductionRegeneration 
3FixationTransamination Regeneration  
4FixationDecarboxylation Regeneration 

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  • 1
  • 2
  • 3
  • 4
$$C_4$$ plants have better productivity because
  • $$C_4$$ plants absorb more light.
  • $$C_4$$ plants absorbs more $$CO_2$$.
  • $$C_4$$ plants lack photorespiration.
  • All of the above.
  • Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
  • Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
  • Assertion is correct but Reason is incorrect.
  • Both Assertion and Reason are incorrect.

Which one of the following is wrong in relation to photorespiration?
  • It occurs in chloroplasts
  • It occurs in daytime only
  • It is a characteristic of $$C_4$$ plants
  • It is a characteristic of $$C_3$$ plants
In $$C_4$$ plants, synthesis of sugars occurs in
  • Mesophyll cells
  • Bundle sheath cells
  • Spongy parenchyma cells
  • Palisade parenchyma cells.
Photophosphorylation means synthesis of
  • ATP from ADP
  • NADP
  • ADP from ATP
  • PGA
Melvin Calvin is well known for the discovery of 
  • EMP pathway
  • Krebs cycle
  • Dark reaction of photosynthesis
  • Light reaction of photosynthesis
Which of the following is a simplified equation of photosynthesis?
  • $${CO_2 +2H _2O \xrightarrow[chlorophyll]{light \,energy}C_5 H_{10} O_4 +H_2 O +O_2}\uparrow$$
  • $${CO_2 +2H _2O \xrightarrow[chlorophyll]{light\, energy}(CH_2 O)_n + O_2}\uparrow$$
  • $${CO_2 +2H _2O \xrightarrow[chlorophyll]{light\, energy}C_3 H_6 O_3 +CO_2 +O_2}\uparrow$$
  • $$6CO_{2} + H_2{O} \xrightarrow\ C_{6}H_{12}O_{6} + 6O_{2}$$
  • $$6CO_{2} + 6H_2{O} \xrightarrow\ C_{6}H_{12}O_{6} + 6O_{2}$$
First acidic compound formed in $${C_4}$$ cycle is 
  • OAA
  • Malic acid
  • Pyuvic acid
  • PGA
Dark respiration is
  • Cellular respiration
  • Found in deeper tissues and roots
  • Found only during night
  • Both B and C
In $$C_4$$ plants, chloroplasts are also found in
  • Spongy parenchyma
  • Epidermal cells
  • Guard cells
  • Bundle sheath cells.
$$C_4$$-cycle was discovered by
  • Hatch and Slack
  • Calvin
  • Hill
  • Arnon
Light energy is used in photosynthesis for
  • Breakdown of $$H_2O$$
  • Breakdown of $$CO_2$$
  • Activation of chlorophyll
  • Breakdown of $$C_6H_{12}O_6$$
The enzyme that catalyses carbon dioxide fixation in $$C_4$$ plants is
  • RuBP carboxylase
  • PEP carboxylase
  • Carbonic anhydrase
  • Carboxydismutase
The first carbon dioxide acceptor in $$C_4$$ plants is
  • Phosphoenolpyruvate
  • Ribulose 1, 5-diphosphate
  • Oxalo-acetic acid
  • Phosphoglyceric acid
ATP synthesis during light reaction is
  • Oxidative phosphorylation
  • Photolysis
  • Photophosphorylation
  • Phosphorylation
$$C_4$$ plants are also known as
  • Calvin type
  • Calvin-Bassham type
  • Hatch and Slack type
  • Emerson type
C$$_4$$ plants have .......... carboxylations.
  • One
  • Two
  • Three
  • Four.
In a green cell, the enzyme catalase is localised in
  • Peroxisomes
  • Chloroplasts
  • Lysosomes
  • Vacuoles
Hatch and Slack who discovered alternate method of carbon fixation were from
  • England
  • Australia
  • America
  • New Zealand
The entire reactions of $$C_4$$ pathway take place in
  • Mesophyll and bundle sheath
  • Vascular bundle and palisade tissue
  • Mitochondria and peroxisomes
  • Bundle sheath and endoplasmic reticulum
In photorespiration the number of ATP and NADPH synthesised are respectively
  • 1 and 3
  • 2 and 3
  • 3 and 4
  • 0 and 0.
Photorespiration is also called
  • $$C_2$$ cycle
  • $$C_3$$ cycle
  • $$C_4$$ cycle
  • $$C_5$$ cycle
In $$C_4$$-pathway initial carbon dioxide fixation occurs in chloroplasts of
  • Guard cells
  • Mesophyll
  • Bundle sheath
  • All the above
Photorespiration requires this activity by an enzyme
  • Hydrolase
  • Oxygenase
  • Carboxylase
  • ATPase
3-phosphoglyceric acid as first $$CO_2$$ fixation product in algal photosynthesis was discovered by
  • Priestley
  • Ingenhousz
  • Calvin
  • Sachs
Kranz anatomy is not seen in (i) Maize (ii) Sorghum (iii) Tomato.
  • i and ii
  • ii only
  • i only
  • iii only
Non-cyclic photophosphorylation results in production of
  • ADP
  • ATP
  • NADPH
  • ATP and NADPH
Photorespiration produces
  • Sugar but not ATP
  • ATP but no sugar
  • Both ATP and Sugar
  • Neither ATP nor sugar
Which of the following scientist is best known for his work on photosynthesis?
  • Peter Debye
  • Erwin Mueller
  • Melvin Calvin
  • Leonardo de Vinci
Cyclic photophosphorylation forms
  • NADPH
  • ATP
  • ATP and NADPH
  • ATP, NADPH and $$O_2$$
PEP is primary $$CO_{2} $$ acceptor in 
  • $$C_{4} $$
  • $$C_{3} $$
  • $$C_{2} $$
  • both $$C_{3}$$ and $$C_{4} $$ plants
Which of the following is concerned with carbon dioxide fixation?
  • Krebs' cycle
  • Calvin cycle
  • Orhithine cycle
  • Glycolysis
Identify the false statements and rewrite them correctly by changing the first or the last word only.
Dark reaction of photosynthesis occurs during night time.
  • True
  • False
The fixation and reduction of $$CO_{2}$$ occur in presence of
  • ATP
  • ATP and NADPH
  • NADPH, chlorophyll and water
  • ATP, NADPH and light
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