细胞与分子生物学是对细胞及其结合形成分子的研究。这包括它们的生理特性，例如它们的结构，它们与细胞外环境和其他细胞的相互作用，它们的生命周期，分裂和功能以及最终死亡。这是在微观和分子水平上完成的。细胞生物学既研究细菌等单细胞生物，又研究人类和植物等生物中的特化细胞。显微镜和分子方法用于了解生物体如何发育，它们对环境的反应以及患病状态与健康状态的区别。细胞生物学知识对于我们对疾病和感染的理解以及开发新的方法来解决这些问题至关重要。
Cell and Molecular Biology is the study of cells and the molecules that combine to form them. This includes their physiological properties such as their structure, their interaction with the extra-cellular environment and other cells, their life cycle, division and function, and eventual death. This is done both on a microscopic and molecular level. Cell biology researches both single-celled organisms such as bacteria, and specialised cells in organisms, such as humans and plants. Microscopy and molecular approaches are used to understand how organisms develop, how they respond to their environment and how the diseased state differs from the healthy state. Knowledge of cell biology is vital to our understanding of disease and infection and in developing new methods to combat these.