**Core Concept**
Apoproteins, also known as apolipoproteins, are protein components of lipoproteins that play a crucial role in lipid metabolism and transport. They help in the formation, assembly, and transport of lipoproteins in the bloodstream, and are essential for the regulation of cholesterol and triglyceride levels.

**Why the Correct Answer is Right**
To answer this question correctly, we need to evaluate each statement about apoproteins and identify the one that is false. Apoproteins are involved in the transport of lipids, including cholesterol and triglycerides, through the bloodstream. They bind to lipids to form lipoproteins, which are then transported to various tissues throughout the body. Apoproteins also play a role in the regulation of lipid metabolism, including the activation of enzymes involved in lipid synthesis and breakdown.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because apoproteins are not primarily involved in the breakdown of lipids. While they do play a role in the regulation of lipid metabolism, their primary function is to transport lipids, not to break them down.
**Option B:** This option is incorrect because apoproteins are not directly involved in the synthesis of lipids. While they do play a role in the regulation of lipid metabolism, their primary function is to transport lipids, not to synthesize them.
**Option C:** This option is incorrect because apoproteins are not directly involved in the regulation of glucose metabolism. While they do play a role in the regulation of lipid metabolism, their primary function is to transport lipids, not to regulate glucose metabolism.

**Clinical Pearl / High-Yield Fact**
Apoproteins are essential for maintaining normal lipid levels in the bloodstream, and abnormalities in apoprotein levels can lead to various lipid disorders, including hyperlipidemia and atherosclerosis. It is essential for clinicians to understand the role of apoproteins in lipid metabolism to diagnose and manage these disorders effectively.

**Correct Answer: C. Apoproteins are not directly involved in the regulation of glucose metabolism.**