Photosystem I Functions: Electron Flow and Function

The video tutorial explains the processes in photosystems 2 and 1, focusing on the differences in electron donation and the mechanisms for filling electron holes. It highlights the role of the oxygen evolving complex in photosystem 2 and plastocyanin in photosystem 1. The tutorial also outlines the electron flow pathway, including the involvement of chlorophyll, quinone, iron-sulfur proteins, and ferredoxin, ultimately leading to NADP+ reduction.

What is the primary role of light in photosystem 2?

• To split water molecules

• To excite electrons in P680

• To generate ATP directly

• To produce NADPH

Which complex fills the electron hole in P680?

• Cytochrome B6F

• Ferredoxin

• Plastocyanin

• Oxygen evolving complex

In photosystem 1, what fills the electron hole in P700?

• Cytochrome B6F

• Oxygen evolving complex

• NADP+

• Plastocyanin

What is the final electron acceptor in the electron flow from P700?

• Plastocyanin

• Cytochrome B6F

• Ferredoxin

• NADP+

Which molecule receives electrons from ferredoxin?

• Cytochrome B6F

• NADP+

• P680

• Plastocyanin