**Core Concept**
Hemoproteins are a class of proteins that contain a heme group, a cofactor composed of an iron atom bonded to a porphyrin ring. The heme group is essential for the binding and transport of oxygen, electrons, and protons in various biological processes.

**Why the Correct Answer is Right**
The heme group in hemoproteins is responsible for the binding of oxygen through a process called oxyhemoglobin dissociation. This binding involves the iron atom in the heme group, which undergoes a conformational change to facilitate the release of oxygen. Hemoproteins, such as hemoglobin, myoglobin, and cytochrome c oxidase, play crucial roles in oxygen transport, storage, and electron transfer in the body.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because hemoproteins are not enzymes, although some hemoproteins, like cytochrome P450, possess enzymatic activity.
* **Option B:** This option is incorrect because hemoproteins are not nucleic acids, which are essential for storing and transmitting genetic information.
* **Option C:** This option is incorrect because hemoproteins are not glycoproteins, which are proteins that contain carbohydrate chains.

**Clinical Pearl / High-Yield Fact**
Hemoproteins are essential for maintaining adequate oxygen delivery to tissues, and disorders affecting hemoproteins, such as sickle cell anemia, can lead to severe clinical consequences.

**Correct Answer:** C.