Which statement is true? opinions can be scientifically tested. scientific theories are absolute and cannot be changed. scientists have learned all they’ll ever know about science. facts can be scientifically tested.

You are studying a protein that you call protein x. there is an aspartic acid at a key position in protein x which is important in the folding and stabilization of that protein. if this aspartic acid is changed to a different amino acid, which type of amino acid substitutions is most likely to allow the protein to fold normally?