This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Enzymes, Subject name: Biochemistry
[{'content': 'Which of the following is a reverse transcriptase? \nSelect and explain. \nA. Topoisomerase 2, B. Telomerase, C. RNA polymerase 2, D. DNA polymerase alpha', 'role': 'user'}, {'content': 'Answer: B \nExplanation: *Telomerase Is a Specialized Reverse Transcriptase.*Ceain RNA viruses that infect animal cells carry within the viral paicle an RNA-dependent DNA polymerase called reverse transcriptase.*The RNA viruses that contain reverse transcriptases are known as retroviruses.*Reverse transcriptases catalyze three different reactions: (1) RNA-dependent DNA synthesis, (2) RNA degradation, and (3) DNA- dependent DNA synthesis.Ref: Harper Biochemistry; 30th edition', 'role': 'assistant'}]