In a sense a great deal of development is about transcription factors, for these factors regulate gene activity and so the state of the cell.

RNase L is part of the body's innate immune defense, namely the antiviral state of the cell.

This gradient is of interest as an indicator of the state of the cell through parameters such as the Nernst potential.

The operon must respond to changes in the metabolic state of the cell.

Depending on the state of the cell, both sources are either connected, or isolated.

Thus, the state of the cell can be determined.

The amount of charge needed to flip the memory cell to the opposite state is measured and the previous state of the cell is revealed.

Whether protoplasm is in the sol or the gel state depends on the physiological state of the cell.

These regulate translation in response to the state of the cell via their phosphorylation state and again protect the message from decapping.

In active matrix addressing, some sort of capacitor (external to the cell proper) is used to maintain the state of the cell.