Which one of the following statements about protein nutrition is correct? All dietary proteins have the same amino acid content and composition.
There is a requirement for dietary protein, but it is unimportant which protein is
consumed.
For an adult in nitrogen equilibrium there is only a small requirement for an
intake of protein since amino acids arising from tissue protein catabolism are
available for new protein synthesis
The requirement for dietary protein is for individual amino acids, not simply the
total amount of protein in the diet.