Which of the following statements are true about poly A tail?
I. It contains the Poly-A-polymerase enzyme
II. It makes RNA unstable
III. It allows mRNA to degradation
IV. Present in prokaryotes
I and II
II and III
I and III
II and IV
The Poly-A- tail is present in the eukaryotic cells and adds "A" at the end of mRNA. The enzyme adds the poly-A tail residue called Poly-A-polymerase. The poly-A-tail Prevents mRNA from degradation and makes RNA stable. Hence, option 3 is the correct answer.