... all the enzymes, there is an active site where the substrate molecules are converted to the enzyme molecule and from there they are converted to product molecules. All enzymes are shaped in their own way so then they would be able ...

... all the enzymes, there is an active site where the substrate molecules are converted to the enzyme molecule and from there they are converted to product molecules. All enzymes are shaped in their own way so then they would be able ...

... The stomach has three mechanical tasks to do. Firstly Muscles in the stomach relax and allow large amounts of food to be stored, secondly the stomach releases the protease enzyme (pepsin) which breaks down proteins into smaller pieces called peptides. ...

... the part of the enzyme that allows it to be a catalyst. As below: Anabolic reaction. Molecules of substrate Enzyme Active site The enzyme Molecule is now free to bind with more molecules of substrate. Each enzyme Molecule may be used many thousands of ...

... again Working best at a neutral pH value and at the bodies temperature, a rise above 50 degrees celsius changes the shape of an enzyme and they can no longer work. In my experiment Amylase is the enzyme, which ...

... won't be very accurate, as we will only be able to give the time to the nearest minute. Fair Testing: In this experiment there is only one variable, and that is the temperature of the water in the glass beaker. Everything else ...

... example being the human stomach, which is kept at a constant temperature of around 37°C, but if the environment in which the enzyme is working becomes too hot then the enzyme will start to denature; which is where it will ...

... the amylase to work effectively. From my results I can tell that my original hypothesis; 'I predict that as the temperature increases amylase will break starch down into glucose faster,' is partly correct, as the temperature rises from 31°C -34°C ...

... can digest the gelatine by the protease enzyme pepsin leaving silver salts behind. As they are no longer supported by the gelatine they will fall to the bottom of the test tube and the film that was in contact with ...

... different distillations, the enzymes can make alcohol of up to 20% proof so it is usually used to make beer and wine as the individual tastes of these products make the market extensive and wide in variety. The disadvantage of ...

... substrate specific. The active site of each different enzyme has its own particular tertiary structure, so only a substrate with a complementary shape will fit; we say it has a highly specific shape. In order to work, an enzyme must ...

... caused a reappraisal of our understanding of how metabolism is controlled in plants. Traditional Methods Metabolic pathways consist of a series of chemical modifications to a compound which results in substrates being turned into products. At each step of the way ...

... is an optimum rate in doing so, and an experiment is being carried out to find out what causes this. Factors. The factors that affect the enzyme sucrase: 1) Temperature 2) pH 3) Concentration of the enzyme (sucrase) 4) Concentration of the substrate (sucrose) Enzymes has different ...

... are hydrophilic (they like water) and the non polar tails are hydrophobic (they dislike water). The bi-layer allows lipid soluble molecules to pass through it but not ions and polar molecules. The force that pushes substances across the membrane is ...

... such as enzymes. Glycoprotiens and glycolipds are found on the surface of the cell. They form a cell coat (glycocalyx) and are important in cell protection and recognition. The bilayer is described as fluid since the lipids within it are able ...

... of the cell and will mix with water but not with fat, this is called a hydrophilic. And the tail, will be inside the cell and will mix with the fat but not with the water, and is called hydrophobic. ...

... a cell membrane depends on a number of factors, including:> the steepness of the concentration gradient, that is the difference in the concentration of the substance on the two sides of the surface. If there are, for example, many more ...

... example of diffusion is a tea bag in water - the flavour and colour from the tea inside the bag diffuse through the water. Another example is oxygen diffusing into a red blood cell in the body. Another process by which ...

... a plasma membrane which has the phopholipid bilayer with proteins, polysaccharides and different kinds of lipids. This arrangement of molecules is like a mosaic. Because the molecules move about in their layers, the membrane behaves like a fluid. This is ...

... and 100% saturation ( point 4) 4- Represents the amount of O2 given up by the Hb molecule that is now free too diffuse into the respiring tissues. Hb is a complex molecule that has evolved to O2 and only deliver it ...

... and reducing, depending on the type of reaction they control. Some enzymes, such as pepsin and trypsin, which bring about the digestion of meat, control many actions, whereas others, such as urease, are extremely specific and may accelerate only one ...

... and reducing, depending on the type of reaction they control. Some enzymes, such as pepsin and trypsin, which bring about the digestion of meat, control many actions, whereas others, such as urease, are extremely specific and may accelerate only one ...

... divided into two classes, the innate system (natural immunity) and the innate system, which is not capable of specifically recognising antigens, and resistance to infection is not determined by a returning infection, given that it does not stimulate the memory ...

... resembling that of oxaloacetate in the citric acid cycle. A molecule of ornithine combines with one molecules of ammonia and one of CO2 to form citrulline. A second amino group is added to citrullinw to form arginine, which is then ...

... unequal concentration by actively transporting ions against their concentration gradients. Changed polarity of the membrane, the action potential, results in propagation of the nerve impulse along the membrane. An action potential is a temporary reversal of the electrical potential along the ...