300816 Cell Biology LECTURE
Lecturer: Tony Haigh
L-lysine is an essential amino acid but the stereoisomer D-lysine is not. Why can the human body only
utilise one form?
Antibodies recognise the D form and destroy it
Enzymes can only recognise one form
As L and D forms are enantiomers they bind and inhibit each other
As L and D forms are chiral molecules they bind and inhibit each other
Q2. Common lipids for energy storage are
Q3. Which of the following is not a component of nucleic acids?
The whole of chapter 5
Highlighted in this lecture are the following:
Conservation of matter
Cell membrane made o f phospholipids and proteins which are the structure/function and some have sugars
Membranes do things = function.
They do work and to do this they require energy = Laws of Thermodynamics.
Are well ordered = ordered complexity.
Have to be put together the right way = ordered
Cell has to have concentrations of things in a particular range = homeostasis
Fluid mosaic model
Are understood to be a mixture of things and have a particular structure/pattern
Are a fluid
Work like other fluids but is hydrophobic not hydrophilic like water.
Made of 32 main parts
Structure part = phospholipid
Proteins - are integral or peripheral, peripheral sit on outside or inside of bilayer
Proteins allow things across or through membrane
Transmembrane proteins important for getting things across membrane and to recognise what things are.
Markers allow them to recognise what kind of cell they are.