biology enzymes essay

Section 1. Introduction “Enzymes are proteins that have catalytic functions” [1], “that speed up or slow down reactions”[2], “indispensable to maintenance and activity of life”[1]. They are each very specific, and will only work when a particular substrate fits in their active site. An active site is “a region on the surface of an enzyme where the substrate binds, and where the reaction occurs”[2]. “Lactase is an enzyme that breaks down lactose, the sugar in milk. It is produced by the cells

question: How will the concentration of enzyme affect the reaction? The enzyme used in this investigation was peroxidase. The enzyme concentration was changed by making the enzyme more concentrated than was it is.The effect of enzyme concentration on the reaction was measured by the color change per minute. The purpose was using the original procedure as the control group. The dependent variable was used by Keywords: Lorem, ipsum, dolor  Introduction Enzymes are proteins, in which it speeds up

Introductory Biology 1 Biology 1003 Fall Term 2011 Lab Number: 3 Title: Cell Energetics: Enzyme Role in Biological Reactions Name: Brandon Moore Student Number: 100819124 Lab day and time: Wednesday pm Date: Wednesday November 23, 2011 Introduction Enzymes are a key aspect in our everyday life and are a key to sustaining life. They are biological catalysts that help speed up the rate of reactions. They do this by lowering the activation energy of chemical reactions (Biology

a high pH. All enzymes are not equally as functional across the spectrum of pH concentration, however each enzyme has it’s own optimum pH at which it is capable of performing its' designated function at the maximum rate. Enzymes sensitivity to pH is determined by the tertiary structure as it determines the shape and charge of the active site. The tertiary structure is formed by the ionic bonds between the amine group, carboxyl group, and the “R” group. (Ms Cooper's A Level Biology). “A change in

Introduction Enzymes are protein molecules produced by living organisms such as animals and plants which can be made up of one or multiple polypeptide. They are also known as biological catalyst they are recyclable compounds that are never consumed during a reaction. (Campbell,2015) Enzymes are also strings of Amino Acid that have a 3-D structure. To speed up a reaction enzymes act as catalyst and reduce the amount of time and energy required for this to occur. An example of one would be an elevator

Objective: Biology 160 Lab 5 Part A: Scientific Methodology & Enzyme Activity 4/28/15 The purpose of this experiement is to determine the effect of temperature on the rate of enzyme reaction, specifically testing the reaction rates at 0, 23, 37, and 55 degrees Celcius. Introduction: 1. According to the book Campbell Biology, an enzyme is a biological catalyst that reduces the activation energy in a reaction, allowing the chemical reaction to take place at a faster rate. A substrate binds to the

Introduction: Enzymes defined as biological catalysts that speed the chemical reaction by reducing the activation energy (Biology Department, 2014). Enzymes play an important biological role in the cell, as it is important to keep the cell alive by speed up the reaction, which explains why in absence of enzyme some reactions need long time (Richard & Mark, 2001). Also, enzymes regulate organism intercellular function for example enzymes help to keep human body healthy by defend it from infection

AP Biology Lab: Catalase (Enzymes) Abstract In this laboratory exercise, studies of enzyme catalase, which accelerates the breakdown of hydrogen peroxide into water and oxygen. The purpose was to isolate catalase from starch and measure the rate of activity under different conditions. The laboratory was also conducted in association with a second laboratory that measured the effects of an inhibitor on the enzymes. Changes in temperature and pH along with Substrate Concentration and Enzyme

Hydrogen Peroxide Catalase + Water + Oxygen Independent Variable The independent variable in this investigation is pH. Each individual enzyme has it’s own pH characteristic. This is because the hydrogen and ionic bonds between –NH2 and –COOH groups of the polypeptides that make up the enzyme, fix the exact arrangement of the active site of an enzyme. It is crucial to be aware of how even small changes in the

When the experiment was conducted, the main objective was to determine how temperature affected the enzyme amylase and its activity. The function of amylase in this experiment was to break down or digest starch into smaller molecules. In the context of the experiment, the amylases function was to break down starch into monosaccharides. As defined in the Biology in Focus textbook written by Urry, Cain, Wasserman, Minorsky & Reece, monosaccharides are defined as simple sugars of the macromolecule carbohydrate