G In photosystem II, after pigment molecules donate excited electrons to the reaction center, electrons are taken from ___ to replace them. A. sugar B. water C. sunlight D. carbon dioxide

B(water)

Explanation:

Photosystem II uses energy from light to extract electron from water molecule to fill the hole left as the energized electron passes up the chain.When the electrons are removed from the water molecules,the water molecule breaks down into oxygen gas,which bubbles away, and hydrogen ions,which are used to power ATP synthesis.