The Most Usable Form of Sulfur by Microorganisms and Plants

Question

The most usable form of sulfur by microorganisms and plants is:
A)sulfide
B)sulfate
C)hydrogen sulfide
D)sulfhydryl

Accepted Answer

Sulfate (SO4 2-) is the most usable form of sulfur by microorganisms and plants. It can be readily absorbed by plant roots and utilized in various biological processes such as protein and chlorophyll synthesis. Sulfide and hydrogen sulfide are toxic forms of sulfur, while sulfhydryl is a reactive group found in certain amino acids, but not a direct source of sulfur for microorganisms and plants.