Senoufou what does frequent biking do for the hip and knee joints?
Knees
I don't get any arthritis problems. I did have a painful knee once, walking, but I wasn't cycling much. When I did more cycling my knees felt better(I was still walking the same amount, maybe 12miles every couple of Sundays)
But I know other people who complain there knees hurt when they cycle.
I think it depends on the saddle height being set well and good pedalling technique and use of gears.

Hips... idk.

Bottom .... you didn't ask but it can certainly be an issue.
The fitter you get the more pressure you put on the pedals and the less pressure you put on your btm.