L1.14 Photosynthesis (The Light Reaction)

What is the primary purpose of photosynthesis?

• Convert glucose into oxygen

• Convert carbon dioxide and water into glucose and oxygen

• Release carbon dioxide and water

• Produce sunlight from glucose

In the process of photosynthesis, what is oxidized or loses electrons?

• Glucose

• Carbon dioxide

• Water

• Oxygen

Where does the light-dependent stage of photosynthesis occur in plant cells?

• Nucleus

• Mitochondria

• Chloroplasts

• Endoplasmic reticulum

What is the structure within chloroplasts where the light-dependent stage occurs?

• Nucleus

• Thylakoid membranes

• Chloroplasts

• Endoplasmic reticulum

What happens during the water splitting process in the light-dependent stage?

• Formation of glucose

• Release of oxygen, protons (H+ ions), and electrons

• Absorption of light by chlorophyll

• Electron transfer to NADPH+

What is the main function of grana in the thylakoid membranes?

• Absorb sunlight

• Produce glucose

• Release oxygen

• Interconnect stacks of thylakoids

What is the role of the electron transport chain (ETC) in photosynthesis?

• Absorb sunlight

• Generate ATP

• Release oxygen

• What is the role of the electron transport chain (ETC) in photosynthesis?

How is ATP synthesized in the light-dependent stage of photosynthesis?

• Absorption of light by chlorophyll

• Electron transfer to NADPH+

• Protons flow back into the stroma through ATP synthase

• Water splitting and release of oxygen

What is the purpose of Photosystem I in photosynthesis?

• Split water molecules

• Absorb additional photons to excite electrons

• Generate ATP

• Release oxygen

What is NADPH in the context of photosynthesis?

• Oxygen gas

• Adenosine Triphosphate

• Nicotinamide adenine dinucleotide phosphate

• Carbon dioxide