Selenocysteine Is an Amino Acid That Gets Incorporated into Proteins $\mu$

Selenocysteine is an amino acid that gets incorporated into proteins that serve as antioxidants. Evidence points to a need for a minimum daily dose of selenium of 55 $\mu$ g. How many moles of selenocysteine (C₃H₇NO₂Se, 168 g /mol) can be synthesized using this amount of selenium?

A) 3.3 $\times$ 10^-7 mol
B) 7.0 $\times$ 10^-7 mol
C) 3.3 $\times$ 10^-4 mol
D) 7.0 $\times$ 10^-4 mol
E) 3.7 $\times$ 10^-7 mol