The video explains the critical role of carbon in life and how plants obtain it through photosynthesis. Photosynthesis is likened to a factory process occurring in chloroplasts, with thylakoids and stroma playing key roles. Light-dependent reactions convert sunlight into ATP, while the Calvin cycle in the stroma synthesizes sugars. Photosynthesis is vital for life, balancing atmospheric CO2 and producing oxygen. The process is essential for plant growth and impacts the environment significantly.

What is the primary source of carbon for plants?

• Soil

• Water

• Carbon dioxide in the air

• Minerals

Which part of the chloroplast is responsible for capturing light energy?

• Stroma

• Mitochondria

• Nucleus

• Thylakoid

What is the role of chlorophyll in photosynthesis?

• Produces oxygen

• Absorbs light energy

• Stores glucose

• Absorbs water

Which enzyme initiates the Calvin cycle by fixing carbon dioxide?

• Photosystem II

• ATP synthase

• Rubisco

• Cytochrome BF

What is the main product of the Calvin cycle?

• Glucose

• Oxygen

• Chlorophyll

• ATP

How does photosynthesis contribute to the balance of gases in the atmosphere?

• By increasing methane levels

• By reducing oxygen levels

• By increasing nitrogen levels

• By removing CO2 and releasing O2

What is a potential consequence of deforestation on atmospheric CO2 levels?

• Decrease in CO2 levels

• Increase in CO2 levels

• No change in CO2 levels

• Increase in oxygen levels