This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Transcription, Subject name: Biochemistry
RNA polymerase is - 
Select and explain. 
A. DNA dependent RNA polymerase, B. RNA dependent DNA polymerase, C. DNA dependent DNA polymerase, D. RNA dependent RNA polymerase
A: DNA dependent RNA polymerase
Answer: A: DNA dependent RNA polymerase 
Explanation: Ans. is 'a' i.e., DNA dependent RNA polymerase o The major enzyme involved in transcription (i.e. synthesis of DNA to RNA) is RNA polymerase, o It is DNA dependent RNA polymerase.o DNA dependent DNA polymerase - DNA plymerase (In DNA replication)o DNA dependent RNA polymerase - RNA polymerase (In transcription)o RNA dependent DNA polymerase - Reverse transcripatase (In reverse transcription)