I agree completely that a cell does experience a form of consciousness. I'm stealing and mildly editing this from (http://plato.stanford.edu/entries/qualia/) because it's 3AM and I'm shattered.

"Block asks us to suppose that a billion Chinese people are each given a two-way radio with which to communicate with one another and with an artificial (brainless) body. The movements of the body are controlled by the radio signals, and the signals themselves are made in accordance with instructions the Chinese people receive from a vast display in the sky which is visible to all of them. The instructions are such that the participating Chinese people function like individual neurons, and the radio links like synapses, so that together the Chinese people duplicate the causal organization of a human brain. Whether or not this system, if it were ever actualized, would actually undergo any feelings and experiences, it seems coherent to suppose that it might not. "

We might consider that it does. The Chinese-Body problem is similar to a cell experiencing a form of consciousness in some manner. I see no problem that if a human that is made up of cells experiences consciousness, there is a sense of consciousness in a singular cell.