Telomeric sequence, centromere , autonomously replicating sequence from yeast are characteristics features of

Options

A. YAC
B. Bacteria
C. Retrovirus
D. All of these

Answer

To answer the question regarding the telomeric sequence, centromere, and autonomously replicating sequence from yeast, we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Understanding the Components**:
- **Telomeric Sequence**: These are repetitive nucleotide sequences located at the ends of chromosomes. They protect the chromosome from degradation and play a crucial role in cellular aging and replication.
- **Centromere**: This is a region on a chromosome that joins two sister chromatids. It is essential for proper segregation during cell division.
- **Autonomously Replicating Sequence (ARS)**: This is a sequence of DNA that allows for the initiation of replication in yeast. It enables the DNA to replicate independently of the chromosomal DNA.

2. **Identifying the Context**:
- The question mentions these features in the context of yeast. In yeast, these elements are critical for the structure and function of chromosomes.

3. **Connecting to the Correct Answer**:
- The presence of telomeric sequences, centromeres, and ARS indicates that we are dealing with a type of artificial chromosome that incorporates these features for efficient replication and stability.
- The term that encompasses these features is **Yeast Artificial Chromosome (YAC)**. YACs are vectors used in genetic engineering that can carry large fragments of DNA and contain telomeric sequences, centromeres, and ARS.

4. **Conclusion**:
- Therefore, the telomeric sequence, centromere, and autonomously replicating sequence from yeast are characteristic features of **Yeast Artificial Chromosomes (YACs)**.

### Final Answer:
The telomeric sequence, centromere, and autonomously replicating sequence from yeast are characteristic features of **Yeast Artificial Chromosomes (YACs)**.

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