BIOL103 Lecture Notes - Lecture 2: Cell Membrane, Nuclear Membrane, Nucleoid
Document Summary
Explain that different types of microscopy are used to study the structure of cells. Microscopy: cells and subcellular components are usually too small to be seen by the naked eye, human eye limit of resolution is approx. 200 micrometres: most cells are between 1-100 micrometres and therefore only visible under microscope. Prokaryotic cells: lack membrane bound nucleus, much smaller 1 micrometre in diameter, characterised by, no nucleus, dna in unbound region called nucleoid, no membrane bound organelles, cytoplasm bound by plasma membrane. Distinguish the main features of animal and plant cells and outline the differences between them. Plasma membrane: selective barrier that allows sufficient passage of oxygen, nutrients and waste to service the volume of every cell, general structure is phospholipid bi layer. Explain the role that the nucleus plays in the cells and how rna and protein molecules move between the nucleus and the cytoplasm.
