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.

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."

cuz some people don't have enough food. that's why we need more ppl to donate food to the hungry.