Photosynthesis In Higher Plants Multiple Choice Question and Answers

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Photosynthesis In Higher Plants Multiple Choice Questions

Question 1. Phosphoenol pyruvate (PFP) is the primary CO2 acceptor in—

  1. C4 plants
  2. C2 plants
  3. C3 and C4 plants
  4. C3 plants

Answer: 1. C4 plants

Question 2. With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

  1. Increasing atmospheric CO2 concentration up to 0.05% can enhance CO2 fixation rate
  2. C3 plants respond to higher temperatures with enhanced photosynthesis while C4 plants have much lower temperature optimum
  3. Tomato is a greenhouse crop which can be grown in CO2 enriched atmosphere for a higher yield
  4. Light saturation for CO2 fixation occurs at 10% of full sunlight

Answer: 2. C3 plants respond to higher temperatures with enhanced photosynthesis while C4 plants have much lower temperature optimum

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Question 3. The process which makes a major difference between C3 and C4 plants—

  1. Photorespiration
  2. Respiration
  3. Glycolysis
  4. Calvin cycle

Answer: 3. Glycolysis

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Question 4. Mitochondria and chloroplast are—

  1. Semi-autonomous organelles
  2. Formed by the division of pre-existing organelles they contain DNA but lack protein-synthesizing machinery

Choose the correct Answer

  1. Both [1] and [2] are correct
  2. [2] is true but [1] is false
  3. [1] is true but [2] is false
  4. Both [1] and [2] are false

Answer: 3. [1] is true but [2] is false

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Question 5. Emerson’s enhancement effect and Red drop have been instrumental in the discovery of

  1. Two photosystems operating simultaneously
  2. Photophosphorylation and cyclic electron transport
  3. Oxidative phosphorylation
  4. Photophosphorylation and non-cyclic electron transport

Answer: 1. Two photosystems operating simultaneously

Question 6. In a chloroplast, the highest number of protons are found in

  1. Stroma
  2. Lumen of thylakoids
  3. Intermembrane space
  4. Antennae complex

Answer: 2. Lumen of thylakoids

Question 7. The oxygen that evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements is involved in this reaction?

  1. Magnesium and Chlorine
  2. Manganese and Chlorine
  3. Manganese and Potassium
  4. Magnesium and Molybdenum

Answer: 2. Manganese and Chlorine

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Question 8. In photosynthesis, the light-independent reactions take place at—

  1. Stromal matrix
  2. Thylakoid lumen
  3. Photosystem-1
  4. Photosystem-2

Answer: 1. Stromal matrix

Question 9. Anoxygenic photosynthesis is characteristic of—

  1. Rhodospirillum
  2. Spirogyra
  3. Chlamydomonas
  4. Ulva

Answer: 1. Rhodospirillum

Question 10. Identify the incorrect statement(s) in relation to C4-photosynthesis—

  1. Kranz Anatomy is an essential feature for C4 plants
  2. C4 plants have higher water use efficiency than C3 plants
  3. Photorespiration can be minimised when the C4 pathway is in operation
  4. Conversion of oxaloacetate to malate occurs in the bundle sheath cells

Answer: 4. Conversion of oxaloacetate to malate occurs in the bundle sheath cells

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Question 11. Photosynthetic Active Radiation (PAR) has the following range of wavelengths

  1. 340-450 nm
  2. 400-700 nm
  3. 500-600 nm
  4. 450-950 nm

Answer: 2. 400-700 nm

Question 12. The products of the light reaction are

  1. Xanthophyll, NADPH and oxygen
  2. Chlorophyll, ATP and NADPH
  3. ATP, NADPH and oxygen
  4. None of the above

Answer: 3. ATP, NADPH and oxygen

Question 13. The C4-photosynthetic system is present in plants which are found in

  1. Cold region
  2. Hot region
  3. Both A and B
  4. Dry tropical region

Answer: 4. Dry tropical region

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Question 14. Which element plays a vital role in the splitting of water to liberate oxygen during photosynthesis?

  1. Copper
  2. Boron
  3. Chlorine
  4. Manganese

Answer: 4. Manganese

Question 15. Synthesis of one glucose molecule requires

  1. 6
  2. 12
  3. 18
  4. 24

Answer: 2. 12

Question 16. Gross primary productivity is the rate of production during photosynthesis

  1. Organic matter
  2. Oxygen
  3. Carbon dioxide
  4. Chlorophyll

Answer: 1. Organic matter

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Question 17. Enzymes required for phosphorylation are located in of chloroplast.

  1. Peristomium
  2. Plastidome
  3. Stroma
  4. Quaantasome

Answer: 4. Quaantasome

Question 18. C4-plants have bundle sheath cells which possess—

  1. Few chloroplasts with thin walls so that gaseous exchange can take place
  2. Large number of chloroplasts with thick walls impervious to gaseous exchange
  3. A large number of chloroplasts with thick walls and no intercellular spaces
  4. None of the above

Answer: 5. None of the above

Question 19. Statement (A): Photorespiration decreases photosynthetic output.

Statement (B): In the photorespiratory pathway, neither ATP nor NADPH is produced.

  1. Both the statements A and B are correct
  2. Both the statements A and B are incorrect
  3. Statement A is correct and statement B is incorrect
  4. Statement B is correct and statement A is incorrect

Answer: 1. Both the statements A and B are correct

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Question 20. Which of the following statements regarding the cycle flow of electrons during the light reaction is false?

  1. This process takes place in stromal lamellae
  2. ATP synthesis takes place
  3. NADPH+ H+ is synthesised
  4. Takes place when light of wavelength beyond 680 nm is available for excitation
  5. PS 2 is not involved in the process

Answer: 3. NADPH+ H+ is synthesised

Question 21. Find out the mismatched pair

  1. C4-plants— Kranz anatomy
  2. Primary CO2 fixation product of C4-plants—OAA
  3. Primary CO2 acceptor of C3-plants— RuBP
  4. Calvin pathway of C4-plants occurs in—Bundle sheath
  5. C3-plants—Maize

Answer: 5. C3-plants—Maize

Question 22. Cyclic photophosphorylation links to—

  1. PS 2
  2. PS 1
  3. dark reaction
  4. Both A and B

Answer: 2. PS 1

Question 23. Thylakoids occur inside—

  1. Mitochondria
  2. Chloroplast
  3. Golgi apparatus
  4. Endoplasmic reticulum

Answer: 2. Chloroplast

Question 24. In the C4 pathway, the CO2 fixation in mesophyll cells is carried out by the enzyme

  1. Pyruvate dehydrogenase
  2. Pyruvate decarboxylase
  3. PEP-carboxylase
  4. RuBisCO

Answer: 4. RuBisCO

Question 25. photosynthetic bacteria have—

  1. Pigment system-1
  2. Pigment system-2
  3. Both A and B
  4. Some other kinds of pigments (P890)

Answer: 4. Some other kinds of pigments (P890)

Question 26. In C3 plants, the first stable product of photosynthesis during the dark reaction is

  1. PAGAL
  2. RuB
  3. PGA
  4. OAK

Answer: 3. PGA

Question 27. In C4 plants, the carbon dioxide fixation occurs in—

  1. Guard cells
  2. Spongy cells
  3. Palisade
  4. Bundle sheath cells

Answer: 4. Bundle sheath cells

Question 28. Photolysis of water is caused by—

  1. PS 1
  2. PS 2
  3. PS 1 and PS 2
  4. None of these

Answer: 2. PS 2

Question 29. CAM pathway is observed in—

  1. Pineapple
  2. Maize
  3. Sunflower
  4. Sugarcane

Answer: 1. Pineapple

Question 30. Which one of the following statements about the events of non-cyclic photophosphorylation is not correct?

  1. Photolysis of water takes place
  2. Oxygen is released
  3. Only one photosystem participates
  4. ATP and NADPH are produced

Answer: 3. Only one photosystem participates

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