Photosynthesis

What is photosynthesis?

• Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll, carbon dioxide, and water.

• Photosynthesis is the process of plants converting carbon dioxide into glucose

• Photosynthesis is the process of plants converting water into oxygen

• Photosynthesis is the process of animals converting sunlight into energy

Name the two main stages of photosynthesis.

• Chlorophyll-dependent reactions and the Calvin cycle

• Light-dependent reactions and the Calvin cycle

• Light-independent reactions and the Krebs cycle

• Dark-dependent reactions and the Calvin cycle

What are the raw materials required for photosynthesis?

• Carbon dioxide and water

• Hydrogen and helium

• Oxygen and nitrogen

• Sunlight and soil

What is the role of chlorophyll in photosynthesis?

• Converts chemical energy into light energy

• Stores light energy and releases it as heat

• Absorbs light energy and converts it into chemical energy

• Reflects light energy and converts it into chemical energy

Where does photosynthesis take place in a plant cell?

• Chloroplasts

• Nucleus

• Endoplasmic reticulum

• Mitochondria

What is the chemical equation for photosynthesis?

• 2CO2 + 2H2O + light energy → C3H6O3 + 2O2

• 6CO2 + 6H2O + light energy → C6H12O6 + 6O2

• 8CO2 + 8H2O + light energy → C8H16O8 + 8O2

• 4CO2 + 4H2O + light energy → C4H8O4 + 4O2

What is the primary product of photosynthesis?

• Glucose

• Water

• Oxygen

• Carbon dioxide

What are the factors that affect the rate of photosynthesis?

• Light intensity, carbon dioxide concentration, and temperature

• Water concentration, oxygen level, and soil pH

How does photosynthesis contribute to the oxygen cycle?

• It releases oxygen as a byproduct

• It converts carbon dioxide into nitrogen

• It absorbs oxygen from the atmosphere

• It has no impact on the oxygen cycle

Explain the importance of photosynthesis in the ecosystem.

• It depletes the oxygen in the ecosystem.

• It provides food and oxygen for the ecosystem.

• It creates pollution and harms the ecosystem.

• It has no impact on the ecosystem.