Question

What are the similarities and differences between POL I, POL II, and POL III?

Answer 1

POL I, POL II, and POL III are different types of RNA polymerases involved in eukaryotic transcription. Here are the similarities and differences between them.

Step-by-step explanation:

POL I, POL II, and POL III are different types of RNA polymerases involved in eukaryotic transcription. Here are the similarities and differences between them:

SIMILARITIES:

1. All three polymerases are enzymes responsible for transcribing DNA into RNA molecules.
2. They all require a DNA template and nucleotides for RNA synthesis.

DIFFERENCES:

1. POL I transcribes the genes that code for ribosomal RNA (rRNA) while POL II is responsible for transcribing protein-coding genes and some non-coding RNA molecules.
2. POL III transcribes genes for transfer RNA (tRNA), small nuclear RNA (snRNA), and some other non-coding RNAs.
3. Each polymerase recognizes specific DNA sequences known as promoters to initiate transcription.

Overall, while all three polymerases are involved in transcription, they have distinct roles and target different types of RNA molecules.