Examlex
Which of the following elements is classified as a semimetal?
Aspartic Acid
An amino acid with the formula C4H7NO4, important in the biosynthesis of proteins.
Histidine
An essential amino acid important in many proteins, playing a key role in enzymes and the buffering of pH in blood.
Phenylalanine
An essential amino acid that is a precursor to neurotransmitters and must be obtained through diet.
Tyrosine
An amino acid that is a building block of protein, essential for protein synthesis in humans.
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