Question

a vegetarian who plans a meal involving rice can consume all the essential amino acids by adding another a plant protein rich in _________.

○ phenylalanine
○ lysine
○ glutamic acid
○ tryptophan

Explanation:

Rice is low in lysine. By adding a plant - protein rich in lysine, a vegetarian can get all essential amino acids. Glutamic acid is non - essential. Phenylalanine and tryptophan are not the main limiting amino acids in rice.

Answer:

lysine