Essays Tagged: "Enzyme"

Biology AT1 on the affect of hydogen peroxide on the liver

esearch Well PresentedAim: 'To see what factors affect the decomposition of hydrogenperoxide by the enzyme catalase which is found in the liver' Introduction: Enzymes are biological catalysts. ... inside living things. Without them the reactions would be so slow that life would grind to a halt. Enzymes work by when a substrate molecule bumps into a molecule of the right enzyme, it fits into a ...

(2 pages) 51 0 4.5 Jan/1996

Subjects: Science Essays > Biology > Human Biology

Biology-action of amylase enzyme on starch

AimWe are trying to find out how the action of amylase enzyme on starch is influenced by temperature.PredictionMy prediction is that the lower the temperat ... rch has been converted into sugars (glucose).Scientific reasonParts of the digestive system produce enzymes which speed up the digestion of food. When the food has been digested it is absorbed through ... are carried to wherever they are needed. The breakdown of the large food molecules is speeded up by enzymes. Enzymes are made by special tissues along the length of the gut. As the food passes along t ...

(3 pages) 75 0 3.0 Dec/2002

Subjects: Science Essays > Biology

Beetroot cell membrane permeability experiment

(6 pages) 39718 1 4.6 Feb/2003

Subjects: Science Essays > Biology

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

The Advantages of using Enzymes in Biotechnology.

The Advantages of using Enzymes in BiotechnologyBiotechnology is the use of biological processes to exploit and manipulate l ... nisms and biological systems to develop or manufacture a product that is a solution to a problem.An enzyme is a protein, which is able to catalyse biochemical reactions. Reactions need to exceed their ... yse biochemical reactions. Reactions need to exceed their activation energy in order to take place. Enzymes reduce the need for activation energy and so allow reactions to take place more readily. An ...

(5 pages) 71 0 3.0 Apr/2003

Subjects: Science Essays > Biotechnology

How Amylase Digests Starch.

IntroductionEnzymes are proteins that are involved in all the chemical processes in living things. As they are m ... l processes in living things. As they are made of proteins they are affected by pH and temperature. Enzymes are catalysts; they speed up chemical reactions without being changed themselves. Digestive ... speed up the breakdown of large food molecules into smaller ones so that the blood can absorb them. Enzymes turn a large starch molecule into thousands of tiny glucose molecules. Enzymes end in 'ase'. ...

(3 pages) 40 0 0.0 Jul/2003

Subjects: Science Essays > Biology

I am going to investigate how the temperature affects the catalyse enzyme on hydrogen peroxide, using potato discs for the catalyse.

AimI am going to investigate how the temperature affects the catalyse enzyme on hydrogen peroxide, using potato discs for the catalyse.HypothesisCatalyse is a biological ... yse.HypothesisCatalyse is a biological enzyme which works best between 30 and 40 degrees, like most enzymes. It also has an optimum pH.Catalyse breaks down Hydrogen Peroxide into water and oxygen. Pla ... eroxide into water and oxygen. Plant and animal cells contain catalyse.`I predict that the catalyse enzyme found in the potato will break down the substrate (Hydrogen Peroxide) quickest at 37- 40 degr ...

(6 pages) 48 0 3.7 Jan/2004

Subjects: Science Essays > Biology

What affect the substrate has on the rate of reaction with the enzyme in potato?

Enzyme InvestigationTaskTo find out what affect the substrate has on the rate of reaction with the e ... 1. PH2. Temperature3. Concentration of substrate4. Concentration of enzyme5. Surface area of potato lumps6. TimeKey VariablesInput variables - concentra ... he rate of reaction. However, I think that eventually the graph will start to level off because the enzymes will reach the highest level at which they can work.I will keep the other variables constant ...

(3 pages) 29 0 3.0 Feb/2004

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

Basics Of Biochemistry

roteins- insulin and growth factor. Transport proteins- hemoglobin. Defense proteins- immunoglobin. Enzymes are the largest group of proteins, they regulate reactions.-Nucleic Acids- composed of a sug ... n the body, they are in charge of protein synthesis and contain all genetic information.9. What are enzymes? Why are they important? Name several properties of enzymes.Enzymes are proteins that acts a ...

(3 pages) 94 1 4.6 Apr/2004

Subjects: Science Essays > Biochemistry

Biology Coursework on Catalyse

IntroductionAn enzyme is a is one of many specialised organic substances designed to act as a catalyst to regulate ... act as a catalyst to regulate the rate of the many chemical reactions that done in the human body, enzymes are classified into many major categories these include hydrolytic, oxidising and reducing d ... e include hydrolytic, oxidising and reducing depending on what part of a reaction they play. Enzymes specifically are large proteins that speed up chemical reactions in the body, they do this b ...

(4 pages) 32 0 4.5 Sep/2004

Subjects: Science Essays > Biology


(4 pages) 44 0 4.0 Jan/2005

Subjects: Science Essays > Biology

Beetroot cell membranes

(4 pages) 31 0 0.0 Feb/2005

Subjects: Science Essays > Biology

How and why do enzymes work?

Enzymes are biological catalysts. They increase the speed of a reaction, without being affected or a ... e speed of a reaction, without being affected or altered themselves. Our bodies contain hundreds of enzymes, each catalysing a particular reaction (increasing the reaction's speed), by reducing the am ... y reducing the amount of energy required to activate the reacting molecules - the activation energy.Enzymes are very important, and if they were not present, life as we know it would be possible. The ...

(2 pages) 23 0 0.0 Mar/2006

Subjects: Science Essays > Biology


1) Write briefly about two different mechanisms by which antibiotics work.It is possible for enzymes to involve themselves in the manufacturing of the cell wall. If a cell wall fails to develop ... are not catalyzed, an antibiotic such as penicillin can be used to fit into the active site of the enzyme that was to catalyze such a reaction. As the penicillin attaches, a covalent bond complex is ...

(1 pages) 383 0 0.0 Nov/2001

Subjects: Science Essays > Biology

Biology AT1 'rate Of Reaction' Planing And Obtaining

This experiment aims to find the factors that effect enzymes focusing on concentration for the test itself. This test will involve the enzyme amylase and ... t will involve the enzyme amylase and starch to test the effect of concentration on a substrate.The enzyme amylase has a certain protein structure meaning it can only link with starch much like puzzle ... uch like puzzle boards only have certain peices that fit into each other. It is this shape that the enzyme has that causes the reaction (a puzzle could not be completed if the peices didn't fit into e ...

(3 pages) 7 0 0.0 Jan/2002

Subjects: Science Essays > Chemistry

Bio Outline

occur at physiological conditions D. Control of these reactions is achieved by specialized protein, ENZYMES.II. Basic Principles of Energy A. Energy - Basics Principles 1. Define Energy - ability to d ... in exactly the right orientation in order for the reaction to take place ("effective collision")..B.Enzymes reduce activation energy (Chap5. p. 167-69) 1. Define Catalyst 2. Define Substrate 3. Random ...

(21 pages) 42 0 0.0 Feb/2008

Subjects: Science Essays > Biology

Alkaline Phosphatase

ions on Alkaline Phosphatase Activity Nathan Overholt Louis Settembrino March 5, 2002 Abstract: The enzyme Alkaline Phosphatase was set up in solutions of varying p-nitrophenyl phosphate concentration ... pNPP) and the Vmax to be 0.433 A/min.Introduction: Alkaline Phosphatase: Alkaline Phosphatase is an enzyme that comes from liver, bone, placenta, and intestine. This enzyme hydrolyses phosphate esters ...

(6 pages) 20 0 0.0 Feb/2008

Subjects: Science Essays > Chemistry


Enzymes are key to the breakdown of larger molecules for use in organisms. Amylase’s role is to ... hrough use of amylase is an important part of consumption of food in living organisms.Amylase is an enzyme that is used to digest starch in humans, and mammals, by breaking it down into smaller carboh ... te sources of energy. Starch is a carbohydrate found in plants, such as vegetables, and fruits ( Alpha-amylase is often referred to as glycogenase, and requires calcium to fu ...

(5 pages) 19 0 0.0 Mar/2009

Subjects: Science Essays > Biology

Biology: Experiment- The Effect of Temperature on the Enzyme Rennin

Aim: The aim of the experiment is to test the effect temperature has on the activity of the enzyme rennin.Hypothesis: I believe the rate of reaction will speed up as the temperature increases ... temperature, where it will begin to slow down and stop reacting. I believe this will occur because enzymes have a temperature range at which they work best in and once the temperature goes out of thi ...

(8 pages) 25 1 0.0 May/2009

Subjects: Science Essays > Biology