Because the water didn't disappear, it just evaporated and now is water vapor in the air.
A protein coat, and some DNA or RNA that isn't normal for a typical human cell.
Answer:
D) cofactor necessary for enzyme activity.
Explanation:
Carboxypeptidase is an enzyme found in the digestive system whose function is to hydrolyze a peptide bond in the terminal carbon of a protein. Said enzyme contains a zinc atom in its active site and when losing a zinc atom it would lead to loss of the activity of the enzyme, making it of great importance for the activity of the enzyme.