Cell Biology BME140 Lecture 1 Diversity of Cells and Main Features Assist. Prof. Dr. Açelya Yılmazer Aktuna

Diversity of Cells and Main Features UNITY AND DIVERSITY OF CELLS Cells come in a variety of shapes and sizes. CELLS UNDER THE MICROSCOPE Light microscope, fluorescent microscope, confocal laser scanning microscope, electron microscope (TEM, SEM), atomic force microscopy) 2

Diversity of Cells and Main Features THE PROKARYOTIC CELL Single-celled organisms No nucleus, no organelles THE EUKARYOTIC CELL The Nucleus Is the Information Store of the Cell Animal and plant cells are typically 5-20um in diameter and can be seen with a light microscope. Presence of organelles 3

Diversity of Cells and Main Features CHEMICAL COMPONENTS OF CELLS C, N, O, H : make up about 90% of a cell’s mass Covalent vs non-covalent bonds 4