Question

select all that apply
select all the components of the photosynthetic electron transport chain.

□ rubisco
□ enzyme that produces nadph
□ photosystem ii
□ proton pump protein
□ photosystem i
□ ribulose bisphosphate (rubp)

Explanation:

• Rubisco (ribulose - 1,5 - bisphosphate carboxylase/oxygenase) is involved in the Calvin cycle (carbon fixation) and not the photosynthetic electron transport chain.
• The enzyme that produces NADPH (ferredoxin - NADP⁺ reductase) is part of the photosynthetic electron transport chain as it catalyzes the final step of producing NADPH using electrons from photosystem I.
• Photosystem II is a key component of the photosynthetic electron transport chain. It absorbs light energy, splits water to release electrons, protons, and oxygen, and initiates the electron transport process.
• Proton pump protein (like cytochrome $b_6$f complex) is part of the electron transport chain. It pumps protons across the thylakoid membrane, creating a proton gradient that is used for ATP synthesis.
• Photosystem I is part of the photosynthetic electron transport chain. It receives electrons from the electron transport chain and uses light energy to excite these electrons, which are then used to produce NADPH.
• Ribulose bisphosphate (RuBP) is a substrate in the Calvin cycle (carbon fixation) and not part of the electron transport chain.

Answer:

• enzyme that produces NADPH
• photosystem II
• proton pump protein
• photosystem I