Can I use a universal 22" wood saw for cutting studwork?
If this is for studwork, i.e. constructing internal wood-framed walls, doorways etc, a 22" 7tpi saw should be suitable.

You would use a finer-toothed saw if you need a better finish with less tear-out/splintering, or if cross-cutting very narrow pieces.

Unless you are sawing large logs, the saw should be ok for a variety of uses.