Explain why animal proteins are called first class prote?

Answer 1

There are 20 amino acids which humans need to construct all the different proteins we need in our bodies. 12 of them are 'non-essential'; they can be made in the body by conversion from another molecule or amino acid. However 8 are 'essential'; they cannot be made in the body and so must be provided in the diet if deficiency diseases are to be avoided.

A first-class protein is one which contains all 8 essential amino acids (and may contain some of the non-essential ones too).They are also called complete proteins in the sense that they contain the 8 essential amino acids needed by humans, the ones that if missing from the diet can't be produced in the body by modifying the ones that are obtained in food staffs.

Animal proteins are complete, plant proteins are not but often different plant food staffs (e.g bread and beans) provide amino acids that between them complete the set of eight essential amino acids.First class proteins- isn't that just the same as primary proteins?

From what i know, primary proteins is shape of the 'normal' polpeptide chain. You might already know that the polypeptide chain is baisically;

amino acids joined to form a dipeptide (via condensation reaction - forms h20 molecule) These dipeptide join in excatly the same way as the were formed to produce polypeptide chains. These are held together by PEPTIDE BONDS. Hope this helpsA complete protein source is like an egg white, since it contains all the essential amino acids. See the link, too.meat proteinsegg white, milk and fish

Answer 2

basically the enzymes break down to make it called 1st class

Answer 3

Because animal proteins contain more or all(20) of the essential amino acids that we require for our good health than any other type of protein.

Answer 4

i dont knoww