Cell and Molecular Biology
- Created by: jessica
- Created on: 13-12-12 17:58
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- Cell and Molecular Biology
- Membrane Structure and function
- phospholipid bilayer with lateral movement
- unsaturated hydrocarbon tails enhance membrane fluidity
- cholesterol reduces membrane fluidity
- integral proteins penetrate hydrophobic core of lipid bilayer
- peripheral proteins loosely bound to membrane surface
- Actin filaments
- polymerizes ATP/ADP
- monomer is globular
- Made of 2 strands bound in helix with 37nm repeat distance
- 3 Types of actin network-cortical (gel like), stress fibres (contractile), tight bundle (stiffening)
- Eukaryotic
- DNA in nucleus
- Contains ER, ribosomes, Golgi apparatus, Lysosomes, Mitochondrion, Peroxisome, Microvilli, Microfilament
- Mitochondria
- Has inner and outer membrane
- Inner membrane has many folds called cristae
- Matrix enzymes for citric acid cycle present
- Outer membrane has porins
- Porins are transport molecules
- Has inner and outer membrane
- OILRIG
- Intermediate filaments
- tough durable protein polymers
- found in nuclear lamina of muscle, epithelial cells and neurons
- support cells and links to adjacent cells
- Cell cycle
- mitosis results in genetically identical daughter cells
- meiosis develops haploid cells in gametes
- Cytokinesis is the splitting of the cell into 2 by the formation of a cleavage furrow
- Prokaryotic
- bounded by plasma membrane, cytosol contains organelles
- Eukaryotic
- DNA in nucleus
- Contains ER, ribosomes, Golgi apparatus, Lysosomes, Mitochondrion, Peroxisome, Microvilli, Microfilament
- Eukaryotic
- DNA in nucleoid
- No membrane bound structures absent
- bounded by plasma membrane, cytosol contains organelles
- Microtubules
- 13 protofilaments
- Polymerisation of microtubules
- Untitled
- Globular tubulin molecules
- Membrane Structure and function
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