You purified a unknown protein complex that consists of 2 protein A and 2 protein B, the unknown protein complex is a ______.Primary structure...

A.You purified a unknown protein complex that consists of 2 protein A and 2 protein B, the unknown protein complex is a ______.

1.Primary structure

2.secondary structure

3.tertiary structure

4.quaternary structure

B.Which of the following is wrong about protein folding?

1.favorable interactions contribute to favorable enthalpy

2.when protein folds into a 3D structure, it decreases its entropy.

3.during protein folding, the entropy of the solvent increases

4.free energy is the only deterinant for protein folding