Question

How many RNA polymerases do Eukaryotes have?
1) One
2) Two
3) Three
4) Four

Answer 1

Eukaryotes have three RNA polymerases, each responsible for transcribing different types of RNA including rRNA, mRNA, and tRNA. The correct option is 3) Three

Step-by-step explanation:

Eukaryotes have three RNA polymerases (RNA polymerase I, RNA polymerase II, and RNA polymerase III), which are responsible for transcribing different types of RNA. RNA polymerase I am located in the nucleolus and primarily transcribes ribosomal RNA (rRNA). RNA polymerase II is essential for the transcription of messenger RNA (mRNA), including all of the protein-coding genes. Lastly, RNA polymerase III is responsible for transcribing transfer RNA (tRNA), 5S rRNA, and small nuclear RNA genes.

Each of these polymerases is made up of more than 10 subunits and requires a unique set of transcription factors for the initiation of transcription. This complexity highlights the more intricate regulation of gene expression in eukaryotes compared to prokaryotes, which have only one RNA polymerase. The correct option is 3) Three