Chapter 3 Physiological Processes Of Life Photosynthesis Multiple Choice Questions
Question 1. Which of the following is/are plant physiological process/processes?
- Respiration
- Transpiration
- Photosynthesis
- All of these
Answer: 4. All of these
Question 2. Which of the following components is/are necessary for photosynthesis?
- Light and chlorophyll
- Carbon dioxide
- Water
- All of these
Answer: 4. All of these
Question 3 The gas released during photosynthesis is—
- Oxygen
- Carbon dioxide
- Both1 and 2
- 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—
- Meristematic tissue
- Mesophyll tissue
- Epidermal tissue
- Vascular tissue
Answer: 2. Mesophyll tissue
Question 5. The main end product of photosynthesis is—
- Glucose
- Starch
- Fructose
- Glycogen
Answer: 1. Glucose
WBBSE Class 9 Photosynthesis MCQs
Question 6. During photosynthesis, terrestrial plants absorb this gas from the atmosphere. Which gas is it?
- H2O
- CO2
- O2
- None of these
Answer: 4. None of these
Question 7. Aquatic plants absorb CO2 through—
- Stomata
- Root hair
- Body surface
- Leaves
Answer: 3. Body surface
Question 8. In plants, stomata help in—
- Absorption of CO2 and O2
- Exchange of CO2 and O2 and release of extra water as vapour
- Intake of CO2 and release of extra water as vapour
- 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—
- Chloroplast
- Chromoplast
- Leucoplast
- Mitochondrion
Answer: 1. Chloroplast
WBBSE Class 9 Life Science Question And Answer
Question 10. In flowering green plants, photosynthesis occurs in—
- Leaves only
- Leaves, sepals, green fruit skin, and tender stems
- Leaves, stems, and roots
- Leaves and tender stems
Answer: 2. Leaves, sepals, green fruit skin, and tender stems
Question 11 Select the correct statement—
- Light reactions of photosynthesis occur in the presence of sunlight
- Photosynthesis can take place only under sunlight
- Dark reaction is hindered in the presence of sunlight
- Glucose is produced as a byproduct of light reaction
Answer: 1. Light reactions of photosynthesis occur in the presence of sunlight
Key MCQs on Photosynthesis for Class 9
Question 12. The only metallic element present in chlorophyll is
- Carbon
- Copper
- iron
- Magnesium
Answer: 4. Magnesium
WBBSE Class 9 Life Science Question And Answer
Question 13. Source of oxygen, released during photosynthesis, is
- CO2
- H2O
- Both 1 and 2
- None of these
Answer: 2. H2O
Question 14 The color of light preferable for the maximum rate of photosynthesis, is
- Greenlight
- Blue light
- Yellow light
- Red light
Answer: 4. Red light
Question 15. Photosynthesis occurs at its best under
- High oxygen concentration
- Low carbon dioxide concentration
- High carbon dioxide concentration under red light
- Low oxygen concentration under green light
Answer: 3. High carbon dioxide concentration under red light
Question 16. During photosynthesis, phosphorylation occurs in
- Light-dependent phase
- Light-independent phase
- Both 1 and 2
- None of these
Answer: 1. Light-dependent phase
Practice MCQs for Chapter 3 Photosynthesis
Question 17. One of the end products of the light-dependent phase is
- NADP
- FAD
- ADP
- ATP
Answer: 4. ATP
Question 18. Which of the following is called the Hill reagent?
- NADP
- ATP
- NAD
- FAD
Answer: 1. NADP
Question 19. Reactions of the light-dependent phase occur in
- Stroma of chloroplast
- Grana of chloroplast
- The inner membrane of the chloroplast
- Mitochondrial matrix
Answer: 2. Grana of chloroplast
Question 20. Fill in the blank with the correct option. _________ \(+\mathrm{Pi} \longrightarrow A T P\)
- AMP
- ADP
- NADP
- NAD
Answer: 2. ADP
WBBSE Class 9 Life Science Question And Answer
Question 21. Fill in the blank with the correct option. \(\mathrm{H}_2 \mathrm{O} \longrightarrow\)_______\(+\mathrm{OH}^{-}\)
- H2
- H
- 2H
- H+
Answer: 4. H+
Question 22. Which of the following statements is correct?
- The ionization of water in photosynthesis needs no light
- Photophosphorylation is the only light-dependent reaction, taking place in photosynthesis
- Both hydrolysis and photophosphorylation involve chlorophyll
- Photophosphorylation needs chlorophyll but hydrolysis does not
Answer: 3. Both hydrolysis and photophosphorylation involve chlorophyll
Question 23. Which of the following statements is incorrect?
- ATP formation occurs during photosynthesis by photophosphorylation
- Will reaction occurs in the light-dependent phase of photosynthesis
- Carbon assimilation does not occur at all in the presence of light
- Glucose formation is the last phase of photosynthesis
Answer: 3. Carbon assimilation does not occur at all in the presence of light
Chapter 3 Life Science Quiz Questions on Photosynthesis
Question 24. The scientist who discovered the reaction pathway for the photolysis of water is—
- Robin Hill
- M. Calvin
- Blackman
- C. Linnaeus
Answer: 1. Robin Hill
Question 25. The first stable carbon compound produced during photosynthesis is—
- PGA
- PGAld
- Glucose
- Starch
Answer: 1. PGA
Question 26. What is the name of the following reaction?
- Photophosphorylation
- Photolysis of water
- Carbon assimilation
- Glucogenesis
Answer: 3. Carbon assimilation
Important Questions on Photosynthesis for Class 9
Question 27. Resynthesis of RuBP from PGA occurs during
- Hill reaction
- Glycolysis
- Blackman reaction
- Calvin cycle
Answer: 3. Calvin cycle
Question 28. In photosynthesis, photolysis of water is popularly known as
- Blackman reaction
- Hill reaction
- Z-scheme
- 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
- Glucose
- Glycogen
- Starch
- Cellulose
Answer: 3. Starch
Question 30. Which of the following is not a photosynthetic pigment?
- Carotene
- Phycobilin
- Chlorophyll
- Haemocyanin
Answer: 4. Haemocyanin
Question 31. Photosynthesis is a
- Chemical process
- Mechanical process
- Photochemical process
- None of these
Answer: 3. Photochemical process
Concepts Related to Photosynthesis for MCQs
Question 32. Out of the 7 colors of the visible spectrum, which two lights are the most effective for photosynthesis?
- Red and blue
- Green and red
- Blue and green
- Yellow and green
Answer: 2. Red and blue
Question 33. The wavelength of red light in the visible spectrum ranges from
- 430-470 nm
- 650-760 nm
- 580-650 nm
- 480-570 nm
Answer: 2. 650-760 nm