Does smell affect sense of taste?

It is kind of. Obviously the senses are different, but they kind of overlap -- metaphorically. The tongue can detect certain tastes, such as bitter, sweet, sour, and spicy. However, most foods are a combination of these, or even an entirely different sensation all together! Cherries for example. If you could truly only taste certain... tastes, then you would never know the difference between cherries and other sweet things. That's where the sense of smell comes in! With the addition of smell, people can distinguish their foods, via the olfactory nerves.