Photosynthesis: Understanding the Process

What is the primary function of photosystem in photosynthesis?

• Convert carbon dioxide into glucose

• Produce oxygen as a byproduct

• Absorb light and transfer energy to the reaction center

• Regulate the temperature of the plant

Explain the process of light reaction in photosystem.

• The process of light reaction does not involve the splitting of water molecules

• Chlorophyll absorbs light and triggers the release of carbon dioxide

• Light reaction occurs in the stroma of the chloroplast

• Chlorophyll absorbs light and triggers the splitting of water molecules, leading to the generation of ATP and NADPH.

What is the role of chlorophyll in photosystem?

• Reflects light energy away from the reaction center

• Converts carbon dioxide into glucose

• Regulates the temperature of the plant

• Absorbs light energy and transfers it to the reaction center

How is carbon dioxide fixed during photosynthesis?

• Electron transport chain

• Calvin cycle

• Krebs cycle

• Glycolysis

Describe the Calvin cycle and its role in carbon dioxide fixation.

• The Calvin cycle is a series of reactions that take place in the mitochondria of photosynthetic organisms. It plays a crucial role in the release of carbon dioxide into the atmosphere.

• The Calvin cycle is a series of biochemical reactions that take place in the chloroplasts of photosynthetic organisms. It plays a crucial role in the fixation of carbon dioxide from the atmosphere into organic compounds.

• The Calvin cycle is a set of reactions that occur in the cytoplasm of plant cells. It is involved in the production of oxygen from carbon dioxide.

• The Calvin cycle is a process that occurs in the nucleus of plant cells. It is responsible for the absorption of carbon dioxide from the environment.

What are the key enzymes involved in carbon dioxide fixation?

• ATP synthase and NADH dehydrogenase

• Cytochrome c oxidase and Succinate dehydrogenase

• Rubisco and PEP carboxylase

• Lactate dehydrogenase and Pyruvate kinase

Explain the role of ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) in carbon dioxide fixation.

• RuBisCO catalyzes the fixation of carbon dioxide during photosynthesis.

• RuBisCO is only involved in oxygen fixation

• RuBisCO breaks down carbon dioxide during photosynthesis

• RuBisCO has no role in carbon dioxide fixation

What are the factors that can affect the rate of carbon dioxide fixation?

• Light intensity, temperature, water, and nutrients

• Time of day, moon phase, and altitude

• Number of plant species, cloud cover, and air pressure

• Wind speed, humidity, and soil pH

How does the concentration of carbon dioxide affect the rate of photosynthesis?

• Has no effect

• Causes the process to stop

• Increases

• Decreases

Discuss the importance of photosynthesis in the ecosystem.

• Photosynthesis is important in the ecosystem because it depletes oxygen and disrupts the food chain.

• Photosynthesis is not important in the ecosystem as it only produces carbon dioxide.

• Photosynthesis is not important in the ecosystem as it only benefits plants.

• Photosynthesis is important in the ecosystem as it produces oxygen and provides food for the rest of the food chain.