Teichoic acid is present in:-

Options

A. gram+ve bacteria
B. Gram-ve bacteria
C. Actinomycetes
D. Blue green algae

Answer

**Step-by-Step Solution:**

1. **Understanding Teichoic Acid**: Teichoic acids are polymers that are found in the cell walls of certain types of bacteria. They are important components that contribute to the structural integrity of the bacterial cell wall.

2. **Identifying the Types of Bacteria**: The question provides four options:
- Gram positive bacteria
- Gram negative bacteria
- Actinomycetes
- Blue green algae (cyanobacteria)

3. **Analyzing Gram Positive Bacteria**: In gram positive bacteria, the cell wall is thick and primarily composed of peptidoglycan. This layer contains teichoic acids, which are anionic glycopolymers. They play a crucial role in maintaining cell shape and regulating cell division.

4. **Analyzing Gram Negative Bacteria**: Gram negative bacteria have a thinner peptidoglycan layer and an outer membrane. They do not contain teichoic acids in their cell walls.

5. **Analyzing Actinomycetes**: The cell wall of actinomycetes is made up of amino acids and amino sugars, and does not contain teichoic acids.

6. **Analyzing Blue Green Algae**: Blue green algae, also known as cyanobacteria, have a cell wall composed of mucopeptides, and they do not contain teichoic acids.

7. **Conclusion**: Based on the analysis, teichoic acids are specifically present in gram positive bacteria.

**Final Answer**: Teichoic acid is present in **gram positive bacteria**.

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