________________ has a DNA dependent RNA polymerase activity.Select one:A.TopoisomeraseB.LigaseC.DNA polymerase IIID.HelicaseE.Primase
Question
____________________ has a DNA dependent RNA polymerase activity.
Select one:
- A. Topoisomerase
- B. Ligase
- C. DNA polymerase III
- D. Helicase
- E. Primase
Solution
Break Down the Problem
- Identify the question's focus: the enzyme that possesses DNA-dependent RNA polymerase activity.
- Evaluate the options provided.
Relevant Concepts
DNA-dependent RNA polymerase is an enzyme that synthesizes RNA from a DNA template. It plays a crucial role in transcription, the first step in gene expression. Only specific enzymes are responsible for this function.
Analysis and Detail
- Topoisomerase: Primarily involved in altering the supercoiling of DNA but does not synthesize RNA.
- Ligase: Enzyme that joins two DNA strands together but is not involved in RNA synthesis.
- DNA polymerase III: Functions primarily in DNA replication, synthesizing DNA rather than RNA.
- Helicase: Unwinds the DNA double helix, but does not synthesize RNA.
- Primase: Synthesizes short RNA primers that provide a starting point for DNA synthesis, and also possesses DNA-dependent RNA polymerase activity.
Verify and Summarize
From the analysis, it is evident that Primase is the only enzyme among the options that can perform DNA-dependent RNA polymerase activity, specifically by synthesizing RNA primers for DNA replication.
Final Answer
E. Primase
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