Telomere repetitive DNA sequences control the function of eukaryote chromosomes because they

Options

A. help chromosome pairing
B. prevent chromosome loss
C. act as replicons
D. are RNA transcription initiator

Answer

### Step-by-Step Solution:

1. **Understanding Telomeres**:
- Telomeres are repetitive DNA sequences located at the ends of eukaryotic chromosomes. They consist of short, repeated sequences of nucleotides.

2. **Function of Telomeres**:
- The primary function of telomeres is to protect the ends of chromosomes from deterioration or from fusion with neighboring chromosomes. This is crucial because linear chromosomes are susceptible to losing important genetic information during DNA replication.

3. **DNA Replication and Telomeres**:
- During DNA replication, DNA polymerase cannot fully replicate the very ends of linear chromosomes. As a result, some DNA is lost each time a cell divides. Telomeres act as protective caps that prevent the loss of essential coding DNA.

4. **Role of Telomerase**:
- The enzyme telomerase adds repetitive nucleotide sequences to the ends of telomeres, replenishing them after DNA replication. This helps maintain the length of telomeres, preventing chromosome shortening over successive cell divisions.

5. **Conclusion**:
- The correct answer to the question is that telomere repetitive DNA sequences control the function of eukaryotic chromosomes by preventing chromosome loss.

### Final Answer:
Telomere repetitive DNA sequences control the function of eukaryotic chromosomes because they **prevent chromosome loss**.

---