<prompt> Cereals and pulses are considered complementary sinceCereals are deficient in methionineCereals are deficient in methionine and pulse are deficient in lysineCereals are deficient in lysine and pulses are deficient in methionineCereal proteins contain non - essential amino-acids, while pulse proteins contain  <response>: Supplementary action of proteins Cereals are deficient in essential amino acid Lysine threonine.Pulses are deficient in essential amino acid Methionine.So if cereals are eaten with pulses, their proteins complement each other provide a more balanced and complete protein intake. 