Two proteins interact to form a multimeric complex. When one of the proteins is mutated, there is a substantial loss of functional activity in the multimeric protein. This type of mutation is classified as:.1. hypomorphic2. amorphic3. hypermorphic4. dominant negative5. neomorphic

Explanation:

Mutation is the process in which sudden changes take place within the sequence of amino acids that causes different type of problems. On the basis of nature and conditions mutation can be classified as dominant negative, neomorphic and some others types. Dominant mutation is also called as antimorphic mutation and changes the functions of the  molecules that are proteins.

The correct answer is sharing of electrons.

Explanation:

Covalent bond is defined as the bond which is formed when sharing of electrons takes place between the atoms. This is usually formed between two non-metals.

For Example: Formation of hydrogen chloride molecule

Electronic configuration of hydrogen =

Electronic configuration of chlorine =

Hydrogen and chlorine atoms are need only 1 electron to attain stable electronic configuration. So, they share electron and form covalent bond.

Hence, the correct answer is sharing of electrons.