The Essential Role of Photosynthesis in Life and Ecosystems

The video explains the critical role of photosynthesis in sustaining life on Earth. It covers the basic process where plants, algae, and some bacteria convert carbon dioxide, water, and sunlight into carbohydrates and oxygen. The video delves into the photosynthesis equation, highlighting the importance of light and dark reactions, and introduces the Calvin Cycle as a key component in producing carbohydrates. The explanation emphasizes the significance of photosynthesis in providing energy for living organisms.

What is the primary role of photosynthesis in the ecosystem?

• To produce carbon dioxide

• To absorb oxygen

• To generate sunlight

• To create oxygen and carbohydrates

Which organisms are primarily associated with photosynthesis?

• Viruses

• Fungi

• Plants, bacteria, and algae

• Animals

What are the main inputs required for the photosynthesis process?

• Oxygen and glucose

• Carbon dioxide, water, and sunlight

• Glucose and ATP

• Nitrogen and oxygen

What is the general formula for carbohydrates produced in photosynthesis?

• H2O

• C6H12O6

• CH2O

• CO2

What are the two main stages of photosynthesis?

• Electron transport and fermentation

• Glycolysis and Krebs cycle

• Oxidation and reduction

• Light-dependent and light-independent reactions

What is produced during the light-dependent reactions?

• Glucose and oxygen

• ATP and NADPH

• Carbon dioxide and water

• Chlorophyll and sunlight

What is the role of NADPH in photosynthesis?

• It absorbs sunlight

• It acts as a reducing agent

• It stores oxygen

• It breaks down glucose

What is the Calvin Cycle also known as?

• Dark reactions

• Light-dependent reactions

• Electron transport chain

• Glycolysis

What is the primary product of the Calvin Cycle?

• Oxygen

• ATP

• NADPH

• PGAL/G3P

Which molecule is essential for the Calvin Cycle to produce carbohydrates?

• Oxygen

• Carbon dioxide

• Water

• Glucose