Question

When an electron is removed from the reaction center of photosystem II, the missing electron is replaced by an electron from which of the following?

A) photosystem I
B) H+
C) H2O
D) manganese
E) sunlight

Answer 1

The missing electron in the reaction center of photosystem II is replaced by an electron from water (H2O), as PSII split water molecules using sunlight energy to extract electrons (A).

Step-by-step explanation:

When an electron is removed from the reaction center of photosystem II (PSII), the missing electron is replaced by an electron from H2O (water). The reaction center of PSII, also known as P680, uses the energy from sunlight to extract electrons from water molecules.

This process splits the water, releasing oxygen gas, protons, and electrons. The electrons that are released from water molecules travel through the chloroplast electron transport chain to photosystem I (PSI), participating in the generation of NADPH and ATP, which are essential for the light-dependent reactions of photosynthesis.

SO, the answer is A.