Essays Tagged: "enzyme activity"

An AP Biology Lab: Inhibiting the Action of Catechol Oxidase

his lab, Mr. Greene's sixth period AP Biology class split into groups "to investigate inhibition of enzyme activity by specific chemicals called inhibitors" (1). Group three pondered this lab's inhibi ... ompetes" with the substrate by mimicking it, and thus "wins" the position at the active site of the enzyme. The blocked substrate in turn cannot join with the active site, causing the enzyme's activit ...

(2 pages) 141 3 3.0 Mar/2003

Subjects: Science Essays > Biochemistry

Enzyme-controlled reaction, factors that affect the chemical structure and properties of the enzyme.

Write an explanation of how any two factors affect the rate of an enzyme-controlled reaction. How do these factors affect the chemical structureand properties of the ... actors affect the chemical structureand properties of the enzyme.Many things can affect the rate of enzyme activity. The temperature of the enzyme, the pH of the solution, the concentration of the enz ... n them all, I have chosen to explain the effect of temperature and also the effect of inhibitors on enzyme activity.Temperature :As the temperature is increased the kinetic theory is applied. More ene ...

(3 pages) 95 0 3.0 Apr/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

College lab report on enzymes

Lab Ex#8: "Enzymes: Catalysts of Life"INTRODUCTIONEnzymes are protein organelles where chemical reactions take ... reactions take place to generate energy within our cells. Without the energy produced from the cell enzyme activity, we would not possess the catalyst activity necessary for energy to produce movement ... nment. Variables, such as temperature increases or decreases, can instigate dramatic effects on the enzyme and its intended function.The enzyme has a three-dimensional structure that is specific for t ...

(5 pages) 368 0 3.2 Feb/2004

Subjects: Science Essays > Physics

Summary notes for the updated syllabus 2004-2005, Blueprint of life and Maintaining a balance.

Characteristics of enzymes:"XAre made up of proteins"XAre catalysts, as they speed up the rate of chemical reactions."X ... unchanged at the end of the reaction."XAre needed in only small amounts."XAre highly specific: one enzyme catalyses one type of reaction."XWork best under certain optimum conditions of temperature an ... type of reaction."XWork best under certain optimum conditions of temperature and pH.Role of enzymes:Enzymes are organic catalysts. A catalysts is a general term for any substance that speeds up or bri ...

(4 pages) 39 0 4.5 Apr/2004

Subjects: Science Essays > Biology

The effect of concentration of enzyme and enzyme substrate on the rate of an Enzyme-catalysed reaction

This experiment will be an investigation into enzyme activity. Wherever enzymes are used one has to bear in mind that there are various factors wh ... actors which affect the enzyme activity.I will be investigating how different concentrations of the enzyme catalase affect the rate at which hydrogen peroxide is broken down into water and oxygen. In ... east will be added to a fixed volume and concentration of hydrogen peroxide for a fixed time length.Enzymes are protein molecules that function as catalysts, that is they can speed up a chemical react ...

(13 pages) 84 0 0.0 Mar/2006

Subjects: Science Essays > Biology

Determining the Properties of an Enzyme - Establish the Most Optimal Environment for a Peroxidase Enzyme

Description: A peroxidase enzyme, which was extracted from a brassica compestris (turnip), is tested under various conditions ... evel, and competitive inhibitor (hydroxylamine).ABSTRACT:In order to determine the properties of an enzyme, a peroxidase enzyme was extracted from a brassica compestris (turnip) and tested under vario ... d tested under various temperatures, pH levels, and by a competitive inhibitor (hydroxylamine). The enzyme activity was measured in various ways depending on the activity. Temperature effects showed t ...

(3 pages) 90 0 3.7 Mar/2007

Subjects: Science Essays > Biology

It is a laboratory essay on an experiment we did over enzymes and the effects of the parameters on enzymes.

ABSTRACT Environmental Parameters on Enzyme Activity. Joey McSloy, Functional Biology, Texas State University, San Marcos, TX 78666.Envir ... ional Biology, Texas State University, San Marcos, TX 78666.Environmental parameters may affect the enzyme activity rate. We investigated the effects from four different parameters (substrate concentr ... el, and salt concentration. Each parameter was tested in different ways to determine the effects of enzyme activity. Each parameter tested and had an optimum level where the enzyme activity was at its ...

(6 pages) 93 0 4.8 Apr/2007

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

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


04, 1999 Scientific Problem: Characterizing the effects of dexamethasone on ODC gene expression and enzyme activity in the lung of rat pups.Facts Pertaining the Problem: Numerous studies have shown th ... sone given to rats either at 2, 6, or 10 days of age produces a marked and long-lasting decrease in enzyme activity.

(1 pages) 7 0 0.0 Feb/2008

Subjects: Science Essays > Biology

SDS-PAGE Electrophoresis of Proteins

(non-denaturing) polyacrylamide gel electrophoresis (PAGE).To identify a number of proteins and isoenzyme bands by staining with Coomassie Blue and isoenzyme staining and to determine their relative ... and of protein.Coomassie Blue binds with a large range of proteins almost stoichiometrically and isoenzyme staining detects enzyme activity in a coupled manner. The comparison of the stainings enables ...

(7 pages) 18 0 0.0 Nov/2008

Subjects: Science Essays > Biochemistry

Determining the Influence of pH on the Activity of Catalase Enzyme in Potato Tuber Cells

INTRODUCTIONEnzymes are vitally important for every living organism, because without them the reactions within t ... cells would occur to slow to sustain life. However there are many factors which affect the rate of enzymes reactions. One of them is pH, which influence on the enzyme activity will be the subject of ... zyme activity will be the subject of this investigation. Catalase of potato tuber cells will be the enzyme used in the experiment.RESEARCH QUESTIONWhat is the influence of different values of pH on th ...

(9 pages) 18 0 5.0 Jan/2009

Subjects: Science Essays > Biology

Investigation of the Change of pH Affecting Enzyme Activity

Introduction:Research Question:The purpose of this experiment is to investigate a factor affecting enzyme activity.Hypothesis:A change in the pH of hydrogen peroxide will have an affect on enzyme act ... nge in the pH of hydrogen peroxide will have an affect on enzyme activity.Explanation of Hypothesis:Enzymes are catalytic globular proteins made by living things that regulate the movement of molecule ...

(4 pages) 16 0 1.0 Feb/2010

Subjects: Science Essays > Chemistry