Yes, you can do it all in one FLA. Or you can dynamically load text from external text files, which makes it that much easier to update your content. You will need to:
1) Learn how to work with input text
2) Learn how to work with radio buttons
3) Search for tutorials about making quizzes in Flash
This forum is mostly about asking very specific Action Script questions, so you probably won't get any more detailed guidance than this. If you do a bit of searching it won't take you long to find free online tutorials about all the elements you need to build your own tutorial. Here's one for starters:
Many Flash books contain full chapters about creating interactive quizzes in Flash. For example, the very first chapter of Colin Moock's Action Script: The Definitive Guide
(2nd Edition) gets you started making a quiz that also keeps score.
Then when you're building your tutorial and run into an inevitable aggravating bug that makes you want to tear your hair out, you should come back to this forum and post the offending code, and you will be swamped with generous replies to help you fix these specifics. That's what's wonderful about this forum: no one is going to hold your hand to help you build your project, but when you're having specific trouble, everyone wants to dive in and help.