What is the goal of research questions in a paper?
I think it is important to understand, especially as a new author of research articles, that unless otherwise specified, the term "research question" does not necessarily need to be a sentence or sentences that end in a question mark and actually ask a specific question. On the contrary, a research question is most often not a question at all, but rather an explanation of why the work you are describing is important and how it will advance your field forward.

For example - and this is particularly true within the scientific community: the entire "Introduction" section of a research article acts as the research question. In other words, this section typically gives a background of the research area, explains what work has already been done to advance this field, focuses on what still has yet to be done, and then concludes with what parts of what has yet to be done will be addressed by this particular paper. As you can see, this presents a research question in a very practical way without actually posing any direct questions at all.