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

2. 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

3. 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

4. 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