In newton’s third law of motion, when one object exerts a force on a second object, the forces are

a. equal in magnitude and equal in direction

b. equal in magnitude and opposite in direction

c. opposite in magnitude and equal in direction

d. opposite in magnitude and opposite in direction

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?