Re: "Destroy a Zombie Teleporter" Quest does not work in Ops
It only works in multiplayer, but you can do it solo. Start an empty solo game (on crazy to maximize xp for the building and destroying), build the relevant teleporter on the first stage, then switch teams and destroy it. Sometimes you can combine this with a multiplayer quest for something like capturing bases by continuing with the game until you've met the other quest requirements.
This one ticks me off. If it's a star quest, then make it work in ops. Otherwise, make it a multiplayer quest. I don't buy the "too easy in ops" reasoning - many of these star quests are ridiculously easy to complete.