Okay, these are all good questions. But still, how /do/ you cook a tangerine? I've never heard of such.
English requires pronouns, Korean doesn't. Can't think of them as equivalent languages.
No it is not.
"How does tangerine cook?"
But I don't know if it should be accepted.
을 is an object particle. "How does tangerine cook?" is obviously incorrect.
Oh, I boiled a tangerine in water once in my life, just out of curiosity. Aaaand... it tasted absolutely the same afterwards.