What is the primary function of photosynthesis in plants?
a) To produce oxygen
b) To produce glucose
c) To absorb water
d) To absorb nutrients
Which of the following is the main pigment involved in photosynthesis?
a) Chlorophyll
b) Carotenoid
c) Anthocyanin
d) Xanthophyll
Where does photosynthesis primarily take place in a plant?
a) Roots
b) Stems
c) Leaves
d) Flowers
What is the main byproduct of photosynthesis?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Glucose
What is the role of carbon dioxide in photosynthesis?
a) It is used to produce glucose
b) It is released as a waste product
c) It absorbs sunlight
d) It helps in the formation of chlorophyll
Which part of the plant absorbs water for photosynthesis?
a) Roots
b) Leaves
c) Flowers
d) Stem
What is the energy source for photosynthesis?
a) Heat
b) Sunlight
c) Water
d) Glucose
What is the process called by which plants convert sunlight into chemical energy?
a) Respiration
b) Photosynthesis
c) Transpiration
d) Germination
Which of the following is NOT required for photosynthesis?
a) Water
b) Sunlight
c) Carbon dioxide
d) Nitrogen
In which cellular organelle does photosynthesis occur?
a) Mitochondria
b) Nucleus
c) Ribosome
d) Chloroplast
What is the role of chlorophyll in photosynthesis?
a) To absorb carbon dioxide
b) To absorb sunlight
c) To produce oxygen
d) To release glucose
What is the name of the process by which plants lose water vapor through their leaves?
a) Photosynthesis
b) Germination
c) Transpiration
d) Respiration
Which molecule is produced as a result of the light-dependent reactions of photosynthesis?
a) Oxygen
b) Glucose
c) ATP
d) Water
What happens to the oxygen produced in photosynthesis?
a) It is absorbed by the roots
b) It is released into the atmosphere
c) It is stored in the leaves
d) It is used for respiration
Which part of the plant regulates gas exchange for photosynthesis?
a) Stomata
b) Xylem
c) Phloem
d) Roots
What is the role of light in photosynthesis?
a) To create glucose
b) To break down glucose
c) To provide energy for the reaction
d) To absorb carbon dioxide
Which type of plants undergo photosynthesis?
a) Only flowering plants
b) Only aquatic plants
c) All plants
d) Only plants in the tropics
Which of the following affects the rate of photosynthesis?
a) Temperature
b) Light intensity
c) Carbon dioxide concentration
d) All of the above
What is the chemical equation for photosynthesis?
a) 6CO2 + 6H2O → C6H12O6 + 6O2
b) 6CO2 + 12H2O → C6H12O6 + 6O2
c) C6H12O6 + 6O2 → 6CO2 + 6H2O
d) 6O2 + 6H2O → C6H12O6 + 6CO2
What is the main product of the Calvin cycle in photosynthesis?
a) Oxygen
b) Glucose
c) Water
d) ATP
Which of the following is a factor that can limit the rate of photosynthesis?
a) Lack of water
b) Low light intensity
c) Low carbon dioxide concentration
d) All of the above
What is the role of water in photosynthesis?
a) To provide oxygen
b) To provide hydrogen for glucose production
c) To absorb sunlight
d) To remove carbon dioxide
Which of the following is true about plant growth?
a) It occurs only during the daytime
b) It requires only sunlight
c) It is independent of photosynthesis
d) It is affected by both photosynthesis and environmental factors
What is the role of phloem in plant growth?
a) Transporting water
b) Transporting glucose
c) Transporting oxygen
d) Transporting carbon dioxide
Which of the following is a waste product of photosynthesis?
a) Oxygen
b) Glucose
c) Carbon dioxide
d) Nitrogen
What is the light-independent reaction of photosynthesis also called?
a) Calvin cycle
b) Krebs cycle
c) Glycolysis
d) Citric acid cycle
Which part of the plant absorbs sunlight for photosynthesis?
a) Root hairs
b) Leaf cells
c) Flower petals
d) Stem tissues
What is the effect of low light intensity on photosynthesis?
a) It increases the rate of photosynthesis
b) It has no effect on the rate of photosynthesis
c) It decreases the rate of photosynthesis
d) It stops the process of photosynthesis
How does increased carbon dioxide affect photosynthesis?
a) It decreases the rate of photosynthesis
b) It has no effect on photosynthesis
c) It increases the rate of photosynthesis
d) It stops photosynthesis altogether
What happens to the glucose produced during photosynthesis?
a) It is stored as starch
b) It is used for plant respiration
c) It is transported to all parts of the plant
d) All of the above
