WBBSE Class 9 Life Science Chapter 3 Physiological Processes Of Life Photosynthesis Multiple Choice Questions

Chapter 3 Physiological Processes Of Life Photosynthesis Multiple Choice Questions

Question 1. Which of the following is/are plant physiological process/processes?

  1. Respiration
  2. Transpiration
  3. Photosynthesis
  4. All of these

Answer: 4. All of these

Question 2 Which of the following components is/are necessary for photosynthesis?

  1. Light and chlorophyll
  2. Carbon dioxide
  3. Water
  4. All of these

Answer: 4. All of these

Question 3 The gas released during photosynthesis is—

  1. Oxygen
  2. Carbon dioxide
  3. Both1 and 2
  4. None of these

Answer: 1. Oxygen

Read and Learn More WBBSE Class 9 Life Science MCQs

WBBSE Class 9 Life Science Question And Answer

Question 4 The type of tissue, that serves as the site of photosynthesis, is—

  1. Meristematic tissue
  2. Mesophyll tissue
  3. Epidermal tissue
  4. Vascular tissue

Answer: 2. Mesophyll tissue

Question 5 The main end product of photosynthesis is—

  1. Glucose
  2. Starch
  3. Fructose
  4. Glycogen

Answer: 1. Glucose

WBBSE Class 9 Life Science Chapter 3 Physiological Processes Of Life Photosynthesis Multiple Choice Questions

Question 6 During photosynthesis, terrestrial plants absorb this gas from the atmosphere. Which gas is it?

  1. H2O
  2. CO2
  3. O2
  4. None of these

Answer: 4. None of these

Question 7 Aquatic plants absorb C02 through—

  1. Stomata
  2. Root hair
  3. Body surface
  4. Leaves

Answer: 3. Body surface

Question 8 In plants, stomata help in—

  1. Absorption of CO2 and O2
  2. Exchange of CO2 and O2 and release of extra water as vapour
  3. Intake of CO2 and release of extra water as vapour
  4. None of these

Answer: 2. Exchange of CO2 and O2 and release of extra water as vapor

Question 9 The cell organelle in plants, acting as the site of photosynthetic reactions, is—

  1. Chloroplast
  2. Chromoplast
  3. Leucoplast
  4. Mitochondrion

Answer: 1. Chloroplast

WBBSE Class 9 Life Science Question And Answer

Question 10 In flowering green plants, photosynthesis occurs in—

  1. Leaves only
  2. Leaves, sepals, green fruit skin, and tender stems
  3. Leaves, stems, and roots
  4. Leaves and tender stems

Answer: 2. Leaves, sepals, green fruit skin, and tender stems

Question 11 Select the correct statement—

  1. Light reactions of photosynthesis occur in the presence of sunlight
  2. Photosynthesis can take place only under sunlight
  3. Dark reaction is hindered in the presence of sunlight
  4. Glucose is produced as a byproduct of light reaction

Answer: 1. Light reactions of photosynthesis occur in the presence of sunlight

Question 12 The only metallic element present in chlorophyll is

  1. Carbon
  2. Copper
  3. iron
  4. Magnesium

Answer: 4. Magnesium

WBBSE Class 9 Life Science Question And Answer

Question 13 Source of oxygen, released during photosynthesis, is

  1. CO2
  2. H2O
  3. Both 1 and 2
  4. None of these

Answer: 2. H2O

Question 14 The color of light preferable for the maximum rate of photosynthesis, is

  1. Greenlight
  2. Blue light
  3. Yellow light
  4. Red light

Answer: 4. Red light

Question 15. Photosynthesis occurs at its best under

  1. High oxygen concentration
  2. Low carbon dioxide concentration
  3. High carbon dioxide concentration under red light
  4. Low oxygen concentration under green light

Answer: 3. High carbon dioxide concentration under red light

Question 16. During photosynthesis, phosphorylation occurs in

  1. Light-dependent phase
  2. Light-independent phase
  3. Both 1 and 2
  4. None of these

Answer: 1. Light-dependent phase

Question 17. One of the end products of the light-dependent phase is

  1. NADP
  2. FAD
  3. ADP
  4. ATP

Answer: 4. ATP

Question 18 Which of the following is called the Hill reagent?

  1. NADP
  2. ATP
  3. NAD
  4. FAD

Answer: 1. NADP

Question 19. Reactions of the light-dependent phase occur in

  1. Stroma of chloroplast
  2. Grana of chloroplast
  3. The inner membrane of the chloroplast
  4. Mitochondrial matrix

Answer: 2. Grana of chloroplast

Question 20 Fill in the blank with the correct option. _________ \(+\mathrm{Pi} \longrightarrow A T P\)

  1. AMP
  2. ADP
  3. NADP
  4. NAD

Answer: 2. ADP

WBBSE Class 9 Life Science Question And Answer

Question 21. Fill in the blank with the correct option. \(\mathrm{H}_2 \mathrm{O} \longrightarrow\)_______\(+\mathrm{OH}^{-}\)

  1. H2
  2. H
  3. 2H
  4. H+

Answer: 4. H+

Question 22 Which of the following statements is correct?

  1. The ionization of water in photosynthesis needs no light
  2. Photophosphorylation is the only light-dependent reaction, taking place in photosynthesis
  3. Both hydrolysis and photophosphorylation involve chlorophyll
  4. Photophosphorylation needs chlorophyll but hydrolysis does not

Answer: 3. Both hydrolysis and photophosphorylation involve chlorophyll

Question 23 Which of the following statements is incorrect?

  1. ATP formation occurs during photosynthesis by photophosphorylation
  2. Will reaction occurs in the light-dependent phase of photosynthesis
  3. Carbon assimilation does not occur at all in the presence of light
  4. Glucose formation is the last phase of photosynthesis

Answer: 3. Carbon assimilation does not occur at all in the presence of light

Question 24 The scientist who discovered the reaction pathway for the photolysis of water is—

  1. Robin Hill
  2. M. Calvin
  3. Blackman
  4. C. Linnaeus

Answer: 1. Robin Hill

Question 25 The first stable carbon compound produced during photosynthesis is—

  1. PGA
  2. PGAld
  3. Glucose
  4. Starch

Answer: 1. PGA

Question 26 What is the name of the following reaction?

 

WBBSE Solutions For Class 9 Life Science And Environment Chapter 3 Physiological Processes Of Life Photosynthesis reaction

  1. Photophosphorylation
  2. Photolysis of water
  3. Carbon assimilation
  4. Glucogenesis

Answer: 3. Carbon assimilation

Question 27 Resynthesis of RuBP from PGA occurs during

  1. Hill reaction
  2. Glycolysis
  3. Blackman reaction
  4. Calvin cycle

Answer: 3. Calvin cycle

Question 28 In photosynthesis, photolysis of water is popularly known as

  1. Blackman reaction
  2. Hill reaction
  3. Z-scheme
  4. None of these

Answer: 2. Hill reaction

WBBSE Class 9 Life Science Question And Answer

Question 29 Food synthesized during photosynthesis, is generally stored in plant tissue as

  1. Glucose
  2. Glycogen
  3. Starch
  4. Cellulose

Answer: 3. Starch

Question 30 Which of the following is not a photosynthetic pigment?

  1. Carotene
  2. Phycobilin
  3. Chlorophyll
  4. Haemocyanin

Answer: 4. Haemocyanin

Question 31 Photosynthesis is a

  1. Chemical process
  2. Mechanical process
  3. Photochemical process
  4. None of these

Answer: 3. Photochemical process

Question 32 Out of the 7 colors of the visible spectrum, which two lights are the most effective for photosynthesis?

  1. Red and blue
  2. Green and red
  3. Blue and green
  4. Yellow and green

Answer: 2. Red and blue

Question 33 The wavelength of red light in the visible spectrum ranges from

  1. 430-470 nm
  2. 650-760 nm
  3. 580-650 nm
  4. 480-570 nm

Answer: 2. 650-760 nm

Leave a Comment