Question $43$

$2$ pts

In $1986,$ National Institutes of Health biochemist Thressa Stadtman discovered the $21$st amino acid, selenocysteine. The following is a FALSE statement about the amino acid selenocysteine.

Read each statement as a T$/$F question, the correct answer is FALSE.

Many selenocysteine$-$dependent enzymes function in antioxidant reactions.

The main precursor to the amino acid selenocysteine is selenophosphate, which is derived from selenide.

Selenocysteine is considered an essential amino acid and must be derived from the diet.