My palate looks white from left to right and to each end of the last molars. i have never smoked a pack of cigarette a day.what could it be?

See a dentist: This must be examined and diagnosed appropriately by a professional. It may be precancerous, infectious, or nothing serious, but go and get it looked at. Good luck.

White palate: A whiter palate color than the color of your gum tissue can be natural but i didn't quite understand your question; is the white area changing position? Do you smoke? To get a more definitive answer, i would recommend going to a dentist to check it out and for peace of mind.