How are electrons lost
replaced in photosystem ii?

Water is split to yield two electrons, with oxygen and two hydrogen ions as by-products.

Explanation:

The electron lost from the reaction center is replaced with an electron that comes from water. When two water molecules are split, four electrons and four protons are released.

protein makes up the building blocks of organs, muscles, skin, hormones and pretty much everything that matters in your body.

some choices are:

peanut butter

seeds

eggs

yogurt

meats

fish

so pretty much meat, dairy, nuts, and grains.