Singapore GCE N(A)-Level Nutrition And Food Science Practice Questions - Singapore-Cambridge GCE Normal (Academic) Level Nutrition And Food Science Exam

They contain all indispensable (essential) amino acids in proportions required by the human body. They are protein sources derived exclusively from plant foods such as legumes and grains. They are proteins that cannot be digested or absorbed easily in the human alimentary canal. They contain only dispensable (non-essential) amino acids manufactured by the liver.