Hydrogen bonds between water molecules are than covalent bonds.

Weaker

Explanation:

Without any other context, i'm going to assume that this is comparing the strength of Van der Waals force and covalent bonds.

Van der Waals forces are inter-molecular forces generated because of the polar nature of the water molecule. These are weaker than intra-molecular covalent bonds (which involve sharing of electrons)

explanation:

the sequence of amino acids in a protein determines its function. the dna sequence of a gene determines the amino acid sequence of the resulting protein. thus, any changes in dna sequence can result in changes in protein function. this is called a mutation.