Quiz on Photosynthesis
Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy. It takes place mainly in the chloroplasts of plant cells, where chlorophyll absorbs sunlight. The process uses carbon dioxide and water to produce glucose and oxygen. Photosynthesis not only provides food for plants but also releases oxygen essential for life on Earth. The overall chemical equation is:
6CO₂ + 6H₂O + Light → C₆H₁₂O₆ + 6O₂
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MCQ Questions on Quiz on Photosynthesis
Q. What is the main pigment involved in photosynthesis?
A. Carotene
B. Chlorophyll
C. Xanthophyll
D. Anthocyanin
Correct: Option (B)
Explanation: Chlorophyll is the green pigment in chloroplasts responsible for absorbing sunlight during photosynthesis.
Q. In which part of the plant does photosynthesis mainly occur?
A. Root
B. Stem
C. Leaf
D. Flower
Correct: Option (C)
Explanation: Photosynthesis mainly occurs in the leaves, where chloroplasts are abundant.
Q. Which gas is absorbed during photosynthesis?
A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Hydrogen
Correct: Option (B)
Explanation: Plants absorb carbon dioxide from the air to produce glucose during photosynthesis.
Q. What is the byproduct of photosynthesis?
A. Carbon dioxide
B. Water
C. Oxygen
D. Glucose
Correct: Option (C)
Explanation: Oxygen is released as a byproduct of photosynthesis into the atmosphere.
Q. Which organelle is responsible for photosynthesis?
A. Mitochondria
B. Nucleus
C. Chloroplast
D. Vacuole
Correct: Option (C)
Explanation: Chloroplasts contain chlorophyll and enzymes that facilitate the process of photosynthesis.
Q. What is the main source of energy for photosynthesis?
A. Water
B. Sunlight
C. Oxygen
D. Minerals
Correct: Option (B)
Explanation: Sunlight provides the energy required to convert carbon dioxide and water into glucose and oxygen.
Q. Which molecule is produced as food during photosynthesis?
A. Protein
B. Glucose
C. Starch
D. Cellulose
Correct: Option (B)
Explanation: Glucose is the main carbohydrate produced during photosynthesis, later stored as starch.
Q. What are the raw materials of photosynthesis?
A. Carbon dioxide and oxygen
B. Carbon dioxide and water
C. Oxygen and water
D. Nitrogen and glucose
Correct: Option (B)
Explanation: Photosynthesis uses carbon dioxide from the air and water from the soil to produce glucose.
Q. Where does the light reaction of photosynthesis occur?
A. Stroma
B. Thylakoid membrane
C. Cytoplasm
D. Nucleus
Correct: Option (B)
Explanation: The light reaction takes place in the thylakoid membranes of the chloroplast.
Q. Which scientist discovered photosynthesis?
A. Joseph Priestley
B. Jan Ingenhousz
C. Antoine Lavoisier
D. Robert Hooke
Correct: Option (B)
Explanation: Jan Ingenhousz discovered that sunlight is essential for photosynthesis in green plants.