Cell Signalling Cell signalling is the process by which messages are sent to cells Cell signalling is very important as it?allows multicellular organisms to control / coordinate their bodies and re...
Cell Surface Membranes Phospholipids Form the basic structure of the membrane (phospholipid bilayer) The tails form a hydrophobic core comprising the innermost part of both the outer and inner laye...
Phospholipids, Cholesterol, Glycolipids, Proteins & Glycoproteins The cell membranes of all organisms generally have a similar structure Cell membranes contain several different types of molecu...
The Fluid Mosaic Model of Membranes Membranes are vital structures found in all cells The cell surface membrane creates an enclosed space separating the internal cell environment from the external ...
Enzyme Activity: Immobilised v Free Enzymes can be added to?solutions?and are thereby considered?‘free’?or they can be?immobilised Immobilised enzymes are enzymes that have been bound to an?inert,?...
Enzyme Inhibitors An enzyme's activity can be reduced or stopped, temporarily, by a reversible inhibitor There are?two types?of reversible inhibitors: Competitive?inhibitors have a?similar shape?to...
Vmax & the Michaelis-Menten Constant Substrate concentration?affects the?rate of catalysis?in an enzyme-substrate reaction When the substrate concentration is?fixed?(and enzyme concentration is...
Rate: Inhibitor Concentration There are?two types?of inhibitors: Competitive?inhibitors have a?similar shape?to that of the?substrate?molecules and therefore?compete?with the substrate for the acti...
Rate: Enzyme Concentration Enzyme concentration affects the rate of reaction The?higher?the?enzyme concentration?in a reaction mixture, the?greater the number of active sites?available and the?grea...
