Which of the following is a true statement?

Lysine is a non-essential amino acid Aspartate is an essential amino acid Leucine is commonly used as an ingredient in the buffers of SDS page Tryptophan and tyrosine are significantly more polar than phenylalanine

Tryptophan and tyrosine are significantly more polar than phenylalanine

Tryptophan and tyrosine are significantly more polar than phenylalanine because of the tyrosine hydroxyl group and the nitrogen of the tryptophan indole ring.