Chromosomes / chromatin consists of

Options

A. DNA
B. Protein
C. RNA
D. DNA, RNA and protein

Answer

To answer the question "Chromosomes / chromatin consists of," we will break down the components of chromosomes and chromatin step by step.

### Step 1: Understand the Definition of Chromatin
Chromatin is a complex of DNA and proteins found in the nucleus of eukaryotic cells. It plays a crucial role in packaging DNA into a more compact, dense shape.

**Hint:** Chromatin is not just DNA; it includes proteins that help organize and condense the DNA.

### Step 2: Identify the Main Components
Chromatin consists of:
- **DNA**: The genetic material that carries hereditary information.
- **Proteins**: Primarily histone proteins that help in the packaging of DNA. There are also non-histone proteins involved in various functions.

**Hint:** Think about what helps DNA fit into the nucleus and how it is organized.

### Step 3: Recognize the Role of RNA
While RNA is not a primary component of chromatin, it can be associated with certain processes related to gene expression and regulation. However, the main structural components of chromatin are DNA and proteins.

**Hint:** Consider the primary functions of chromatin versus the roles of RNA in the cell.

### Step 4: Conclusion
Based on the components identified, we can conclude that chromosomes/chromatin consists of:
- **DNA**
- **Histone proteins**
- **Non-histone proteins**

Thus, the correct answer to the question is that chromosomes/chromatin consists of DNA, RNA, and proteins.

**Final Answer:** Chromosomes/chromatin consists of DNA, RNA, and proteins (option number 4).