Photosynthesis: Light Independent Reactions

The video explains the process of photosynthesis, focusing on light-dependent and light-independent reactions. It details carbon fixation through the Calvin cycle, where carbon dioxide is converted into glucose. The importance of glucose as an energy source for plants and animals is highlighted, including its role in forming cellulose and starch.

What is the role of RuBP in the Calvin cycle?

• It is a five-carbon sugar that reacts with carbon dioxide.

• It is an enzyme that catalyzes the light-dependent reactions.

• It is a pigment that absorbs light energy.

• It is a product of the Calvin cycle.

Which molecule provides the energy to convert 3-PGA into G3P?

• Oxygen

• Water

• Carbon dioxide

• NADPH and ATP

Why is glucose considered vital for plants?

• It is a primary energy source for various plant processes.

• It is only used for structural purposes.

• It is used to produce oxygen.

• It is a waste product of photosynthesis.

How do plants utilize glucose to form cellulose?

• By breaking down glucose into smaller sugars.

• By linking glucose molecules into long chains.

• By converting glucose into proteins.

• By using glucose as a pigment.

What happens to starches in heterotrophic organisms?

• They are converted into cellulose.

• They are broken down into glucose.

• They are used to produce oxygen.

• They are stored as proteins.