Photosynthesis

What is the main organelle responsible for photosynthesis?

• Mitochondria

• Nucleus

• Chloroplast

• Endoplasmic reticulum

Which part of the chloroplast contains the pigment chlorophyll?

• Thylakoid membranes

• Mitochondria

• Golgi apparatus

• Stroma membranes

What is the primary function of Photosystem II in photosynthesis?

• Chlorophyll absorption and light harvesting

• Carbon fixation and glucose production

• Water oxidation and electron donation

• ATP synthesis and NADPH production

What is the role of water in the light-dependent reactions of photosynthesis?

• Water is converted into glucose directly in the light-dependent reactions.

• Water is responsible for releasing oxygen as a byproduct of photosynthesis.

• Water is split to provide electrons for the photosystems.

• Water is used as a source of carbon in the Calvin cycle.

What is the process by which carbon dioxide is converted into organic compounds during photosynthesis?

• Calvin cycle

• Krebs cycle

• Electron transport chain

• Glycolysis

What is the enzyme responsible for carbon fixation in the Calvin cycle?

• RuBisDO

• RuBisMO

• RuBisCA

• RuBisCO

How many molecules of ATP and NADPH are required for the fixation of one molecule of carbon dioxide in the Calvin cycle?

• 2 molecules of ATP and 3 molecules of NADPH

• 1 molecule of ATP and 4 molecules of NADPH

• 4 molecules of ATP and 1 molecule of NADPH

• 3 molecules of ATP and 2 molecules of NADPH

What is the final product of the Calvin cycle?

• glucose

• starch

• sucrose

• fructose

What happens to the oxygen molecules produced during photosynthesis?

• They are converted into carbon dioxide.

• They are used up by animals.

• They are stored in the roots of the plant.

• They are released into the atmosphere.

How does photosynthesis contribute to the oxygen content in the atmosphere?

• Photosynthesis converts oxygen into carbon dioxide.

• Photosynthesis depletes oxygen from the atmosphere.

• Plants release oxygen as a byproduct of photosynthesis.

• Photosynthesis has no impact on the oxygen content in the atmosphere.