Due to the hydrogen bonds between water molecules, when water freezes, it will… select all that apply

shrink
increase in mass
expand
decrease in density

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?