BIOL 200 Lecture Notes - Surface Detail, Antibody, Scanning Electron Microscope
Document Summary
Critically discuss the classic definitions of cells and organelles: cells are membrane bound autonomous units capable of carrying out essential life processes: Maintain stable internal environment with concentration of ions and molecules different from the outside. Can maintain itself: viruses are not cells because they cannot maintain themselves, they require a host cell. Viruses are basically a capsule of genetic information that they inject into a cell to hijack: mitochondria and chloroplasts are not cells as they are organelles that require the host cell to survive. Although they evolved from prokaryotic bacteria, they have lost the ability to survive outside of the cell: organelles can be defined as: Components of cells (a specialized subcellular structure) that is specialized to carry out a specific function. Working with other organelles to carry out tasks. Membrane-bound mostly with exceptions such as ribosomes. Describe the major classes of eukaryotic cell organelles and their functions: nucleus.
