Essays Tagged: "Enzyme substrate (biology)"

Examining Some Properties of the Enzymatic Reaction

ions is studied. Catalysts accelerate chemical reactions without permanently changing the reaction. Enzymes, catalysts in biochemical reactions, are globular proteins which lower the activation energy ... action and therefore increase the rate at which efficient reactions can occur. Proteins (henceforth enzymes) are complex molecules made of amino acids in polypeptide chains held together by peptide bo ...

(3 pages) 62 0 4.6 Dec/2002

Subjects: Science Essays > Biology

Enzymes - Lactose-Free milk

ation of glucose, after the milk has been poured into the column containing the immobilised lactase enzymes. The experiment would also be done using two different types of milk (Semi-skimmed and Whole ... rea than those with larger bead size. The volume of the substances used to make immobilised lactase enzymes is the same for all different sizes of beads, ensuring that it's a fair test. Therefore the ...

(26 pages) 131 1 4.4 Feb/2003

Subjects: Science Essays > Biology

Catalase investigation

Trial assessment EnzymesAimThe aim of this experiment is to see the effect of four different concentrations of amylas ... n on the breakdown of starch.PredictionAccording to S-cool.co.uk ( Microsoft corporation 2000), "...Enzymes are proteins and have a specific shape. They are therefore specific in the reactions that th ... n the surface of the protein called the active site. Since the active site for all molecules of one enzyme will be made up of the same arrangement of amino acids, it has a highly specific shape. The e ...

(6 pages) 119 0 4.3 Mar/2003

Subjects: Science Essays > Biology

The effect that temperature has on enzyme activity.

INVESTIGATING THE EFFECT OF TEMPERATURE ON THE RATE OF ENZYME ACTIVITY.To investigate the effect that temperature has on enzyme activity I am going to use ... carbohydrase, which converts starch to simple sugars in the Salivary Glands. Three features of all enzymes are:They are always proteins.They are specific in their actions and each enzyme controls one ... teins.They are specific in their actions and each enzyme controls one particular type of action.The enzymes are not changed in the reaction which they take part in, therefore they can be used over and ...

(6 pages) 189 0 1.5 Jul/2003

Subjects: Science Essays > Biology

An analysis of immobilised enzymes and suspended enzymes

Nikul Patel2004-02-22Immobilised Enzymes Coursework(See graph for Results)Interpretation of resultsIt would seem that the yeast suspe ... t can mix and spread out amongst the substrate much easier and ore efficiently than the immobilised enzyme. This increased surface area provides a higher probability of an enzyme and substrate cumin i ... ce area provides a higher probability of an enzyme and substrate cumin into contact, and forming an enzyme-substrate complex. (When a substrate binds onto an enzymes active site and activates the enzy ...

(2 pages) 36 0 3.0 Mar/2004

Subjects: Science Essays > Biology

Enzyme action

1.Problem / PurposeThe purpose of this experiment is to investigate the properties of an enzyme - substrate reaction2.HypothesisHydrogen peroxide is a very reactive compound that can be use ... that disrupts the metabolism of bacteria. Our body cells and those of many other animals contain an enzyme called catalase that accelerates the conversion of toxic hydrogen peroxide to water and oxyge ... of toxic hydrogen peroxide to water and oxygen gas.In this experiment, if the concentration of the enzyme is increased, then the reaction will proceed faster and if the concentration of the enzyme wi ...

(5 pages) 53 0 5.0 Mar/2004

Subjects: Science Essays > Biology

Investigating the effect of temperature on the action of a protease enzyme on exposed developed film

Investigating the effect of temperature on the action of a protease enzyme on exposed developed filmPlanAim: The aim of the experiment is to find out what effect temper ... m: The aim of the experiment is to find out what effect temperature has on the action of a protease enzyme on exposed developed film.Enzymes are biological catalysts. They are made in livings things b ... are biological catalysts. They are made in livings things built up by amino acids to make protein. Enzymes are able to speed up reactions and can repeat reactions.There are various factors that affec ...

(12 pages) 55 0 0.0 Mar/2004

Subjects: Science Essays > Biology

Enzymes

Enzymes'Enzymes are biological catalysts. A catalyst is defined as a substance that increases the ra ... tance that increases the rate of a chemical reaction without itself undergoing any permanentchange. Enzymes do precisely this in living things. Without them, the rate of the reactions would be so slow ... Without them, the rate of the reactions would be so slow as to cause serious, if not fatal, damage. Enzymes have two main functions: To act as highly specific catalysts, and also to provide a way of c ...

(5 pages) 57 0 0.0 Nov/2004

Subjects: Social Science Essays

Investigation Of Enzymes And Hydrogen Peroxide

TaskTo find the effect of temperature on enzymes, using a potato as a catalyst. The source of catalase is in the potato cells.TheoryEnzymes a ... ical reactions. In their globular structure, a small number of amino acids to form the active site. Enzyme and substrate fail to connect if their shapes do not match exactly. This ensures that the enz ... at the enzyme does not participate in the wrong reaction. When the products have been released, the enzyme is ready to bind with a new substrate.VariablesI shall only be altering the temperature, rang ...

(4 pages) 42 0 4.3 Dec/2004

Subjects: Science Essays > Biology

Biology HSC Notes - Maintaining a Balance

Biology(HSC Course)Topic 1: Maintaining a BalanceEnzymesThe Role of EnzymesEnzymes role is to maintain the rate of chemical activity in an organism. ... ower temperatures, which means that body temperatures do not have to be so high.Chemical CompositionEnzymes are specialised large proteins, which are composed of chains of amino acids, which are folde ... re folded, to produce a 3-D protein structure. (3D: can be denatured).Lock-and-key Mechanism (model)Enzymes control specific reactions, therefore only one compound can react with a particular enzyme. ...

(16 pages) 128 1 3.3 Aug/2005

Subjects: Science Essays > Biology

Enzyme substrate complex

Amylase Starch Maltose I2KI starchBenedicts sugarLike most chemical reactions, the rate of an enzyme-catalyzed reaction increases as the temperature is raised. A ten degree Centigrade rise in te ... mperature is raised. A ten degree Centigrade rise in temperature will increase the activity of most enzymes by 50 to 100%. Variations in reaction temperature as small as 1 or 2 degrees may introduce c ...

(4 pages) 46 0 0.0 Mar/2006

Subjects: Science Essays > Biology

The effect of substrate concentrations on the rate of the decomposition of hydrogen peroxide when catalyzed by the enzyme catalase.

ubstrate concentrations on the rate of the decomposition of hydrogen peroxide when catalyzed by the enzyme catalase. This is part of our work on the function of enzymes, how they work and the effects ... how they work and the effects of conditions on how they work. We have learnt about the formation of enzyme-substrate complexes, the lock and key model, induced fit model, activation energies of normal ...

(17 pages) 54 0 1.0 Mar/2006

Subjects: Science Essays > Biology

Enzyme Kinetics Lab Report: The reaction rate of enzyme, '-amylase in Starch-Iodine solution at different temperatures and pH levels

Abstract:This experimentation was to evaluate absorbance and the reaction rate of an enzyme, '-amylase in starch-iodine solution. We will be testing the relationship between enzymatic r ... the relationship between enzymatic reaction affected by temperature and pH. Through the testing the enzyme at different temperatures, and different pH levels; it would determine at which temperature a ... r specific graphs were drawn to determine at which pH level and temperature was the optimum for the enzyme after the experiment. Although hypothesis that I made that it would work best under temperatu ...

(8 pages) 161 1 3.3 Feb/2007

Subjects: Science Essays > Biology

Enzvmes

Enzymes are catalysts. Catalysts are substances that speed up chemical reactions. The rate at which ... e two important environmental factors. The relationship between structure and function of an enzyme is also important. The specificity of an enzyme comes from it's structure, or shape. A compat ... ificity of an enzyme comes from it's structure, or shape. A compatible fit between the shape of the enzymes' substrate and active site attributes to its specificity. The functions of an enzyme will va ...

(2 pages) 19 0 0.0 Oct/2001

Subjects: Science Essays > Biology

Enzyme Concentration

The Effect of Enzyme Catalysis Concentration On the Substrate Reaction Rates Name here Biology October 21, 2001 En ... 2001 Enzyme Concentration 2 Abstract Hydrogen Peroxide 1.5% was germinated with different levels of enzyme catalase concentrations from 100% enzyme to 0% enzyme, adding water to dilute the concentrati ... om 100% enzyme to 0% enzyme, adding water to dilute the concentrations. The reaction rate with 100% enzyme concentration, opposed to the other levels of enzyme concentration, increased the catalystic ...

(3 pages) 47 0 5.0 Nov/2001

Subjects: Science Essays > Chemistry

Enzyme Assay: Brain Phosphatases

n from rat brain as a function of p-NPP concentration in relation to the Michaelis-Menten model for enzyme kinetics. A photometric procedure was used to quantify the amount of p-NPP substrate was cons ... ing the fixed-incubation period. The calculated results supported the hypothesis that both of these enzymes had obeyed the Michaelis-Menten kinetics. Both Michaelis-Menten plots were hyperbolic fits i ...

(7 pages) 13 0 0.0 Nov/2001

Subjects: Science Essays > Biology

Biology notes on cell metabolism.

x molecules are broken down into simpler molecules. These reactions realease energy.e.g respiration*Enzymes: Catalysts(proteins) which speed up chemical reactions without getting envolved in them.-enz ... s.-Proteins are made up of long chains of amino acids, that fold over and take up a specific shape.-Enzymes will only work if they have the correct shape to allow them to function properly.*substrate: ...

(1 pages) 14 0 0.0 Nov/2007

Subjects: Science Essays > Biology > Human Biology

Enzymes

EnzymesEnzymes are the catalysts used by cells to trigger and control particular chemical reactions. ... sed by cells to trigger and control particular chemical reactions. They are huge protein molecules. Enzymes can build up or break down other molecules. Enzymes are formed at cell sites called ribosome ... osomes. Amino acids are brought to the ribosomes and strung together in a precise way to form these enzymes. These then float free within the cell or into nearby body areas where they are needed. They ...

(2 pages) 11 0 0.0 Feb/2008

Subjects: Science Essays > Biology

Kinetic Properties Of Wheat Germ Aldolase

inetic Properties of Wheat Germ Phosphatase Results: 1. The final concentration of Acid Phosphatase enzyme in this reaction was 0.07 ìM, the final inhibitor concentration was 0.67 ìM. (s ... e;M, the final inhibitor concentration was 0.67 ìM. (see sample calculation one).2. Table 1. Enzyme-Substrate Reaction (Uninhibited) Tube Concentration of PNPP (mM) Volume of 5.0mM PNPP (ml) Vo ...

(3 pages) 14 0 3.0 Feb/2008

Subjects: Science Essays > Chemistry

Enzymes (An Experiment)

Problem The phenomenon that we were looking at was how enzymes in potatoes react with substrate. The enzyme will react with the substrate and use the subst ... until the substrate is used up. The reaction for this can be written as: E+S ES E+P Where E is the enzyme, S is the substrate, ES is a stage called enzyme-substrate, and P is the product. This reacti ... uestion that this experiment is going to prove is how does the temperature affect the rate that the enzyme and substrate reacts? My hypothesis was when at the temperature was at 21°C, room tempera ...

(4 pages) 17 0 0.0 Feb/2008

Subjects: Science Essays > Chemistry