Question

What is a function of a poly-a tail in mrna?

Answer 1

RNA stability

Step-by-step explanation:

It is also known as messenger RNA.

Messenger RNA are single-stranded RNA molecule that corresponds to the genetic sequence of a gene. It is read by the ribosome in the process of producing a protein.

The poly-A tail ensures the RNA molecule is more stable and prevents it from breaking down. The poly-A tail allows the mature messenger RNA molecule to be exported from the nucleus and translated into a protein by ribosomes in the cytoplasm.

Answer 2

Stability of the mRNA

Step-by-step explanation:

The poly A tail comprises of a long stretch of adenine nucleotide. It helps with the stability of the messenger RNA (mRNA) as well as preventing the degradation of mRNA by enzymes in the cytoplasm. After elongation, the poly A tail is usually attached to the 3' end of a pre- mRNA. When the poly A tail is added to the mRNA it enables the exportation of the mature mRNA from within the nucleus into the ribosomes located in the cytoplasm where it is further translated to a functional protein.