Task Functionality

Trying to figure out if there's a way to use a task with a specific field tied to JUST that ONE task - so the user can select from a dropdown box or (pick list as they call it) the answer to the task and then click 'close'.

the task only requires a one word answer yes or no - i've created Task Layouts but those are associated with each new task created. I thought creating the fields would allow me to assign fields TO a task but it doesn't - or at least i can't figure it out.

I have to have this Yes or No question set up as a task in the project because it needs to be assigned to the person who knows the answer and i'd like to make it as easy as possible. Can you guys help me with this? i"m beside myself - things aren't working all over the place and i'm under a huge time crunch. I would appreciate ANY feedback or direction you could provide.

Thank you so much in advance!!!