Glucose is a simple sugar made up of carbon, hydrogen, and oxygen. What kind of molecule is glucose?

A. Glucose is protein.
B. Glucose is a nucleic acid.
C. Glucose is an organic molecule.
D. Glucose is an inorganic molecule.

C. Glucose is an organic molecule.

C. Glucose is an organic molecule.

To determine the kind of molecule glucose is, we need to understand its composition and characteristics. Glucose is a simple sugar composed of carbon, hydrogen, and oxygen atoms. Based on these criteria, let's consider the given options:

A. Glucose is not a protein. Proteins are complex molecules made up of amino acids, not simple sugars.

B. Glucose is not a nucleic acid. Nucleic acids are molecules that store and transmit genetic information, such as DNA and RNA. Glucose is not involved in these processes.

C. Glucose is an organic molecule. Organic molecules are compounds that contain carbon atoms bonded to other atoms, such as hydrogen, oxygen, nitrogen, and phosphorus. Glucose fits this definition, as it contains carbon, hydrogen, and oxygen atoms.

D. Glucose is not an inorganic molecule. Inorganic molecules do not contain carbon. Glucose does contain carbon, so it is not an inorganic molecule.

Therefore, the correct answer is C. Glucose is an organic molecule.