Euchromatin is transcriptionally …..A……. chromatin and heterochromatin is transcriptionally …….B……. chromatin.
Choose the correct option for A and B.

Options

A. A-Active, B-neutral
B. A-Active, B-inactive
C. A-Inactive, B-active
D. A-Inactive, B-neutral

Answer

To solve the question regarding euchromatin and heterochromatin, we need to understand the characteristics of both types of chromatin.

### Step-by-Step Solution:

1. **Understanding Euchromatin**:
- Euchromatin is a form of chromatin that is loosely packed. This loose packing allows for easier access to the DNA for transcription processes. Therefore, euchromatin is considered transcriptionally **active**.

2. **Understanding Heterochromatin**:
- Heterochromatin, on the other hand, is tightly packed and condensed. This dense structure makes it less accessible for transcription machinery, resulting in very little or no transcriptional activity. Thus, heterochromatin is considered transcriptionally **inactive**.

3. **Filling in the Blanks**:
- Based on the definitions and characteristics:
- For blank A (euchromatin), the correct term is **active**.
- For blank B (heterochromatin), the correct term is **inactive**.

4. **Final Answer**:
- Therefore, the completed statement is: "Euchromatin is transcriptionally **active** chromatin and heterochromatin is transcriptionally **inactive** chromatin."