Glycogen is a homopolymer made up of

Options

A. a) glucose units
B. b) galactose units
C. c) ribose units
D. d) amino acids.

Explanation

To answer the question "Glycogen is a homopolymer made up of," we can follow these steps:

### Step 1: Understand the Definition of Homopolymer
A homopolymer is a polymer that consists of only one type of monomer. In the case of glycogen, we need to identify what the repeating unit (monomer) is.

**Hint:** Recall that polymers can be made from one type of monomer (homopolymers) or multiple types (heteropolymers).

### Step 2: Identify the Monomer of Glycogen
Glycogen is primarily composed of glucose units. Each glucose molecule serves as a building block for the glycogen structure.

**Hint:** Think about the basic units that make up carbohydrates and which specific sugar is involved in glycogen.

### Step 3: Count the Number of Monomers
Glycogen is a large molecule that can contain approximately 30,000 glucose units linked together.

**Hint:** Consider the scale of glycogen and how many glucose units are typically found in such polysaccharides.

### Step 4: Understand the Linkages in Glycogen
Glycogen has two types of glycosidic linkages:
- **Alpha 1,4 glycosidic linkage** for the linear chains.
- **Alpha 1,6 glycosidic linkage** for the branching points.

**Hint:** Remember that the type of linkage can affect the structure and function of the polymer.

### Step 5: Confirm the Correct Answer
Based on the information gathered, we can conclude that glycogen is a homopolymer made up of glucose units.

**Hint:** Review the options provided in the question and eliminate those that do not fit the definition of glycogen's composition.

### Final Answer
Glycogen is a homopolymer made up of glucose units.