There is tundra in Alaska, but it is not the entire state. Alaska is more than twice the size of Texas and encompasses islands, coastal areas, mountain ranges, and forested zones.
"Tundra" is an enviormental feature. There is tundra in both western and northern Alaska. I believe there may even be tundra in Anchorage. To find large amounts of tundra you would have to travel...
The tundra has a layer of permafrost while the taiga does not. The taiga also has more trees, animals, and other vegitation. Tundra is located at the poles while taigas are found on most continents....