Question

Which of the following statements concerning the enzyme, telomerase, is true? (Select all that apply.) A) Telomerase removes telomeres, making DNA replication more efficient. B) Telomerase is a ribonuclear protein containing a section of RNA complementary to the telomere. C) Telomerase is reactivated in cancer cells, contributing to their immortality. D) If telomerase was inactivated DNA synthesis would stop.

Answer 1

Answer:

B) Telomerase is a ribonuclear protein containing a section of RNA complementary to the telomeres

C. telomerase is reactivated in cancer cells, contributing to their immortality

Explanation:

• Telomerase elongates telomere ends
• Telomerase binds to a RNA molecule containing  a sequence complementary to the telomeric repeat.

• Telomerase is usually not active in somatic cells but is active in cancer cells- the protein acts to extend the shortened telomeres in these cells preventing them from dying