Telomeres

A

Initiate RNA synthesis

B

Seal ends of chromosomes

C

Have guanine rich repeats

D

Both (2) and (3)

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Telomeres:** - Telomeres are repetitive nucleotide sequences located at the ends of chromosomes. Their primary function is to protect the chromosome ends from deterioration or fusion with neighboring chromosomes. 2. **Evaluating the Options:** - **Option 1: Initiate RNA synthesis.** - This statement is incorrect. Telomeres do not play a role in the initiation of RNA synthesis; their main function is protective. - **Option 2: Seal the ends of the chromosome.** - This statement is correct. Telomeres act like protective caps that seal the ends of chromosomes, preventing them from fraying or sticking to each other, similar to the plastic tips on shoelaces. - **Option 3: Have guanine-rich repeats.** - This statement is also correct. Telomeres consist of repetitive sequences, which are rich in guanine. They do not contain significant amounts of cytosine or adenine repeats. 3. **Conclusion:** - Since options 2 and 3 are correct, the correct answer is option 4, which states that both the second and third options are correct. **Final Answer:** The correct answer is option 4: both the second and third options are correct. ---
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