Class 11 Biology Chapter 13 Photosynthesis in Higher Plants MCQ Questions with Answer

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Photosynthesis in Higher Plants Class 11 MCQ Questions with Answer

Class 11 Biology MCQ with answers are given here to chapter 13 Photosynthesis in Higher Plants. These MCQs are based on the latest CBSE board syllabus and relate to the latest Class 11 BIology syllabus. By Solving these Class 11 MCQs, you will be able to analyze all of the concepts quickly in the chapter and get ready for the Class 11 Annual exam.

Learn Class 11 Photosynthesis in Higher Plants MCQs with answers pdf free download according to the latest CBSE and NCERT syllabus. Students should prepare for the examination by solving CBSE Class 11 Biology Photosynthesis in Higher Plants MCQ with answers given below

Question 1. One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the egion of
(a) violet and green light
(b) indigo and green light
(c) orange and yellow light
(d) blue and red light. 

Question 2. Anoxygenic photosynthesis is characteristic of
(a) Rhodospirillum
(b) Spirogyra
(c) Chlamydomonas
(d) Ulva.

Question 3. Oxygenic photosynthesis occurs in
(a) Oscillatoria
(b) Rhodospirillum
(c) Chlorobium
(d) Chromatium.

Question 4. Which element is located at the centre of the porphyrin ring in chlorophyll ?
(a) Calcium
(b) Magnesium
(c) Potassium
(d) Manganese 

Question 5. Oxygen is not produced during photosynthesis by
(a) Green sulphur bacteria
(b) Nostoc
(c) Cycas
(d) Chara. 

Question 6. 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

Question 7. Emerson’s enhancement effect and Red drop have been instrumental in the discovery of
(a) photophosphorylation and cyclic electron transport
(b) oxidative phosphorylation
(c) photophosphorylation and non-cyclic electron transport
(d) two photosystems operating simultaneously.

Question 8. Stroma in the chloroplasts of higher plant contains
(a) light-dependent reaction enzymes
(b) ribosomes
(c) chlorophyll
(d) light-independent reaction enzymes.

Question 9. Chlorophyll a molecule at its carbon atom 3 of the pyrrole ring II has one of the following
(a) carboxylic group
(b) magnesium
(c) aldehyde group
(d) methyl group. 

Question 10. The size of chlorophyll molecule is
(a) head 15 × 15 Å, tail 25 Å
(b) head 20 × 20 Å, tail 25 Å
(c) head 15 × 15 Å, tail 20 Å
(d) head 10 × 12 Å, tail 25 Å. 

Question 11. Chromatophores take part in
(a) movement
(b) respiration
(c) photosynthesis
(d) growth. 

Question 12. The core metal of chlorophyll is
(a) Ni
(b) Cu
(c) Fe
(d) Mg. 

Question 13. The first step for initiation of photosynthesis will be
(a) photolysis of water
(b) excitement of chlorophyll molecules due to absorption of light
(c) ATP formation
(d) glucose formation. 

Question 14. Which of the following is not a product of light reaction of photosynthesis?
(a) ATP
(b) NADH
(c) NADPH
(d) Oxygen

Question 15. Which of the following absorb light energy for photosynthesis?
(a) Chlorophyll
(b) Water molecule
(c) O₂
(d) RuBP 

Question 16. NADPH₂ is generated through
(a) photosystem II
(b) anaerobic respiration
(c) glycolysis
(d) photosystem I.

Question 17. Chlorophyll a occurs in
(a) all photosynthetic autotrophs
(b) in all higher plants
(c) all oxygen liberating autotrophs
(d) all plants except fungi. 

Question 18. Photosynthetic pigments found in the chloroplasts occur in
(a) thylakoid membranes
(b) plastoglobules
(c) matrix
(d) chloroplast envelope. 

Question 19. Read the following four statements (A – D). (A) Both photophosphorylation and oxidative phosphorylation involve uphill transport of protons across the membrane. (B) In dicot tems, a new cambium originates from cells of pericycle at the time of secondary growth. (C) Stamens in flowers of Gloriosa and Petunia are polyandrous.(D) Symbiotic nitrogen fixers ccur in free-living state also in soil. How many of the above statements are right?
(a) Two
(b) Three
(c) Four
(d) One

Question 20. In light reaction, plastoquinone facilitates the transfer of electrons from
(a) PS-II to Cytb6f complex
(b) Cytb6f complex to PS-I
(c) PS-I to NADP⁺
(d) PS-I to ATP synthase. 

Question 21. In a chloroplast the highest number of protons are found in
(a) intermembrane space
(b) antennae complex
(c) stroma
(d) lumen of thylakoids. 

Question 22. Cyclic photophosphorylation results in the formation of
(a) ATP and NADPH
(b) ATP, NADPH and O₂
(c) ATP
(d) NADPH.

Question 23. Which of the following pigments acts as a reactioncentre during photosynthesis?
(a) Carotene
(b) Phytochrome
(c) P₇₀₀
(d) Cytochrome 

Question 24. Ferredoxin is a constituent of
(a) PS I
(b) PS II
(c) Hill reaction
(d) P₆₈₀.

Question 25. In photosystem I, the first electron acceptor is
(a) an iron-sulphur protein
(b) ferredoxin
(c) cytochrome
(d) plastocyanin.

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Question 26. Electrons from excited chlorophyll molecule of photosystem II are accepted first by
(a) quinone
(b) ferredoxin
(c) cytochrome-b
(d) cytochrome-f. 

Question 27. The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is
(a) iron-sulphur protein
(b) ferredoxin
(c) quinone
(d) cytochrome. 

Question 28. During light reaction of photosynthesis, which of the following phenomenon is observed during cyclic phosphorylation as well as non-cyclic phosphorylation?
(a) Release of O₂
(b) Formation of ATP
(c) Formation of NADPH
(d) Involvement of PS I and PS II pigment systems

Question 29. Which one of the following is essential for photolysis of water?
(a) Manganese
(b) Zinc
(c) Copper
(d) Boron 

Question 30. Read the following four statements, (i), (ii), (iii) and (iv) and select the right option having both correct statements. Statements : (i) Z scheme of light reaction takes place in presence of PSI only. (ii) Only PSI is functional in cyclic photophosphorylation. (iii) Cyclic photophosphorylation results into synthesis of ATP and NADPH2. (iv) Stroma lamellae lack PSII s well as NADP.
(a) (ii) and (iv)
(b) (i) and (ii)
(c) (ii) and (iii)
(d) (iii) and (iv)

Question 31. Which pigment system is inactivated in red drop?
(a) PS-I and PS-II
(b) PS-I
(c) PS-II
(d) None of these 

Question 32. In photosynthesis energy from light reaction to dark reaction is transferred in the form of
(a) ADP
(b) ATP
(c) RuDP
(d) chlorophyll

Question 33. A photosynthesising plant is releasing 18O more than the normal. The plant must have been supplied with
(a) O₃
(b) H₂O with¹⁸O
(c) CO₂ with¹⁸O
(d) C₆H₁₂O₆ with¹⁸O.

Question 34. Which one of the following concerns photophosphorylation ?
(a) ADP + AMP→ ^{Light energy} ATP
(b) ADP + Inorganic PO₄→ ^{Light energy} ATP
(c) ADP + Inorganic PO₄→ ATP
(d) AMP + Inorganic PO₄→ ^{Light energy} ATP

Question 35. Photosystem II occurs in
(a) stroma
(b) cytochrome
(c) grana
(d) mitochondrial surface. 

Question 36. In photosynthesis, the light-independent reactions take place at
(a) photosystem II
(b) stromal matrix
(c) thylakoid lumen
(d) photosystem I. 

Question 37. Which one of the following organisms is correctly matched with its three characteristics?
(a) Pea: C₃ pathway, endospermic seed, vexillary aestivation
(b) Tomato: twisted aestivation, axile placentation, berry
(c) Onion: bulb, imbricate aestivation, axile placentation
(d) Maize: C₃ pathway, closed vascular bundles, scutellum

Question 38. The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because
(a) a proton gradient forms across the inner membrane
(b) there is a change in the permeability of the inner mitochondrial membrane toward adenosine diphosphate (ADP)
(c) high energy bonds are formed in mitochondrial proteins
(d) ADP is pumped out of the matrix into the intermembrane space. 

Question 39. NADP⁺ is reduced to NADPH in
(a) PS I
(b) PS II
(c) Calvin cycle
(d) noncyclic photophosphorylation.

Question 40. PGA as the first CO₂ fixation product was discovered in photosynthesis of
(a) bryophyte
(b) gymnosperm
(c) angiosperm
(d) alga. 

Question 41. Carbon dioxide acceptor in C₃-plants is
(a) PGA
(b) PEP
(c) RuDP
(d) none of these. 

Question 42. Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on
(a) membrane potential
(b) accumulation of Na⁺ ions
(c) accumulation of K⁺ ions
(d) proton gradient. 

Question 43. 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. 

Question 44. For assimilation of one CO₂ molecule, the energy required in form of ATP and NADPH₂ are
(a) 2 ATP and 2 NADPH₂
(b) 5 ATP and 3 NADPH₂
(c) 3 ATP and 2NADPH₂
(d) 18 ATP and 12 NADPH₂. 

Question 45. The mechanism of ATP formation both in chloroplast and mitochondria is explained by
(a) chemiosmotic theory
(b) Munch’s hypothesis (mass flow model)
(c) relay pump theory of Godlewski
(d) Cholodny-Wont’s model. 

Question 46. What will be the number of Calvin cycles to generate one molecule of hexose?
(a) 8
(b) 9
(c) 4
(d) 6 

Question 47. For the synthesis of one glucose molecule the Calvin
cycle operates for
(a) 2 times
(b) 4 times
(c) 6 times
(d) 8 times. 

Question 48. The primary acceptor, during CO₂ fixation in C₃ plants, is
(a) phosphoenolpyruvate (PEP)
(b) ribulose 1, 5-diphosphate (RuDP)
(c) phosphoglyceric acid (PGA)
(d) ribulose monophosphate (RMP). 

Question 49. The carbon dioxide acceptor in Calvin cycle/ C₃-plants is
(a) phosphoenol pyruvate (PEP)
(b) ribulose 1, 5-diphosphate (RuDP)
(c) phosphoglyceric acid (PGA)
(d) ribulose monophosphate (RMP). 

Question 50. Which technique has helped in investigation of Calvin cycle?
(a) X-ray crystallography
(b) X-ray technique
(c) Radioactive isotope technique
(d) Intermittent light 

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