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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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DNA enzyme for aging:
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The correct answer is  Ans. (c) TelomeraseRef: Harper's Biochemistry, 30th ed. pg. 374, 732, 26th ed. Pg- 318* The ends of each chromosome contain structures called telomeres.* Telomeres consist of short, repeat TG-rich sequences. Human telomeres have a variable number of repeats of the sequence 5'-TTAGGG-3', which can extend for several kilobases.* Telomerase, is related to viral RNA-dependent DNA polymerases (reverse transcriptases) and is the enzyme responsible for telomere synthesis and thus for maintaining the length of the telomere.* Telomere shortening has been associated with both aging and malignant transformation. Because of this reason, telomerase has become an attractive target for cancer chemotherapy and drug development.