No, uracil does not always pair with cytosine in the RNA molecule.

Here's the correct pairing scheme:

* Uracil (U) pairs with Adenine (A) in RNA.

* Cytosine (C) pairs with Guanine (G) in RNA.

This pairing scheme is based on the hydrogen bonding interactions between the nitrogenous bases. Uracil and adenine form two hydrogen bonds, while cytosine and guanine form three hydrogen bonds, contributing to the stability of the RNA molecule.