Question

What are the three types of RNA polymerase?

Answer 1

RNA Polymerase:

1. RNA polymerase enzyme synthesizes RNA from a template of DNA.
2. RNA polymerase catalyzes the transcription process.
3. RNA polymerase is responsible for the formation of formation of ribosomal RNA, micro RNA, nuclear RNA, etc.
4. There are different types of RNA polymerase: RNA polymerase I, RNA polymerase II, RNA polymerase III, RNA polymerase IV and RNA polymerase V.

Types of RNA polymerase:

RNA polymerase I:

1. It helps in the polymerization of ribosomal RNA.
2. It is involved in more than 50% of RNA transcription.

RNA polymerase II:

1. It helps in the transcription of mRNA precursors.
2. It forms micro RNA and small nuclear RNA.

RNA polymerase III:

1. It helps in the transcription of transfer RNA.
2. It helps in the transcription of ribosomal RNA.

RNA polymerase IV and RNA polymerase V:

1. They help in the formation of small interfering RNA.
2. They help in the formation of heterochromatin in the nucleus.
3. They are found in plants.