Like a mosaic, the cell membrane is a complex structure made up of many different parts, such as proteins, phospholipids, and cholesterol. The relative amounts of these components vary from ...

Around the same time, researchers James Watson and Francis Crick were pursuing a definitive model for the stable structure of DNA inside cell nuclei. Watson and Crick ultimately used Franklin's ...

We call this comparison a model. The cell or battery is like the boiler ... to power small devices such as a calculator. This circuit diagram shows the same circuit, but uses circuit symbols ...