Video 3.3 Photosynthesis Part 1

Where do the light reactions of photosynthesis take place within the chloroplast?

• Stroma

• Cytoplasm

• Thylakoids

• Mitochondria

What are the primary outputs of the light reactions in photosynthesis?

• Carbon dioxide and sugar

• Oxygen, NADPH, and ATP

• Water and light

• ADP and NADP+

What is the primary role of photosystems in the light reactions?

• To synthesize sugar from carbon dioxide

• To convert light energy into a flow of electrons

• To pump protons from the thylakoid space to the stroma

• To produce oxygen as a useful product

How is ATP primarily generated during the light reactions of photosynthesis?

• By directly combining ADP and phosphate using light energy

• Through the diffusion of protons from the thylakoid space to the stroma via ATP synthase

• By the reduction of NADP+ to NADPH

• By splitting water molecules