A432

Yes. Once it has the feat it can follow the procedure listed on the feat to produce scrolls. That means that a multiclassed cleric/wizard who gains the scribe scroll feat can scribe scrolls of the spells hat he has access to (be them cleric or wizard spells).

A432b

No. If a character who has scribe scroll (its class is irrelevant) knows divine spells he cannot produce arcane spells. If somehow he gets to convert the divine spells (via feats for example) to arcane spells then it would be able to scribe an arcane scroll, it would still not be able to learn it as a wizard spell (if that is what you are thinking) because it wouldn't be on the wizard spell list.