In recent days, urine collected from school toilets in some areas of Nanchang City, Jiangxi Province was sold to pharmaceutical companies to extract urokinase. The chemical formula of urokinase is C 2

In recent days, urine collected from school toilets in some areas of Nanchang City, Jiangxi Province was sold to pharmaceutical companies to extract urokinase. The chemical formula of urokinase is C 2 1 H 25 BrN. Urokinase is a carbon-containing compound, belonging to organic matter, and enzyme is a kind of protein, so the option statement is correct.

B urokinase is composed of five elements: carbon, hydrogen, bromine, nitrogen and oxygen, so the option is correct.

C. A urokinase molecule consists of 2 1 carbon atom, 25 hydrogen atoms, 1 bromine atoms, 2 nitrogen atoms and 3 oxygen atoms, so a urokinase molecule contains 52 atoms, so the option statement is correct.

D, molecules are composed of atoms, urokinase molecules contain nitrogen atoms, but there is no nitrogen molecule, so the option expression is wrong.

So choose D.