Essays Tagged: "substrate"

This biology experiment was conducted in order to see if the change in environmental factors had any effect on enzyme activity.

ction. Each enzyme is specific meaning that if the enzyme fails to bind at the active site with the substrate, the reaction does not take place. Enzymes are affected by environmental factors such as t ...

(3 pages) 134 0 4.5 Dec/2002

Subjects: Science Essays > Biology

Conclusions drawn from My Experiment on the effect of Enzyme concentration on the time taken for a reaction to occur

ntration of urease increases the time the enzyme solution takes to completely react with all of the substrate decreases. The rate of reaction at 1% urease is a lot slower than the reaction that occurr ... 2% urease. The more active sites will lead to more successful collisions between the enzyme and the substrate giving us more enzyme substrate complexes formed. During the experiment bonds are broken i ...

(3 pages) 55 0 3.0 Feb/2003

Subjects: Science Essays > Biology

An AP Biology Lab: Inhibiting the Action of Catechol Oxidase

iourea (PTU).Is it a competitive inhibitor? That is an inhibitor that literally "competes" with the substrate by mimicking it, and thus "wins" the position at the active site of the enzyme. The blocke ... ite, causing the enzyme's activity to be hindered. This inhibition can be reversed, but only if the substrate's concentration levels are increasing raised while the inhibitor's concentration levels ar ...

(2 pages) 141 3 3.0 Mar/2003

Subjects: Science Essays > Biochemistry

Catalase investigation

therefore specific in the reactions that they catalyse. One enzyme will react with molecules of one substrate. The site of the reaction occurs in an area on the surface of the protein called the activ ... l be made up of the same arrangement of amino acids, it has a highly specific shape. The enzyme and substrate fit together through an induced fit. This is when the enzyme and substrate form a complex ...

(6 pages) 119 0 4.3 Mar/2003

Subjects: Science Essays > Biology

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

e activity. The temperature of the enzyme, the pH of the solution, the concentration of the enzyme, substrate and the product. Also, another affector is the number of competitive and non-competitive i ... present and the molecules move fast. This increases the chance of collision between the enzymes and substrate and so increasing the rate of reaction. At these higher temperatures the active site of th ...

(3 pages) 95 0 3.0 Apr/2003

Subjects: Science Essays > Biology

Lab report on enzyme activity.

fic different shape of the active site on an enzyme is unique and prepares it to mix with a certain substrate. Without enzymes, the process of metabolism would be hopelessly slow. The reactant an enzy ... of metabolism would be hopelessly slow. The reactant an enzyme acts on is referred to the enzyme's substrate. The enzyme will combine with or to its substrate. While the two are joined, the substrate ...

(4 pages) 566 0 4.6 Apr/2003

Subjects: Science Essays > Biology

Can life exist without enzymes?

e up of a unique sequence of R groups, with different shapes, giving the site its shape. There, the substrate binds and undergoes a series of catalytic reactions after which the products leave the act ... e general function of an enzyme is to speed up, or catalyze reactions in the organism. It helps the substrate to overcome the activation energy barrier that it must reach in order to change into the p ...

(8 pages) 92 0 4.0 Jun/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.

cells contain catalyse.`I predict that the catalyse enzyme found in the potato will break down the substrate (Hydrogen Peroxide) quickest at 37- 40 degrees Celsius because enzymes work best at certai ... red so molecules of Hydrogen Peroxide won't be able to fit into it and so they can't form an enzyme substrate complex and can't be broken down, so no oxygen or water is created. If it is below 37 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 enzyme in potato.Variables1. PH2. Tem ... n with the enzyme in potato.Variables1. PH2. Temperature3. Concentration of substrate4. Concentration of enzyme5. Surface area of potato lumps6. TimeKey ... Surface area of potato lumps6. TimeKey VariablesInput variables - concentration of substrateOutput variable - volume of gasPredictionI think that to start with, the higher the concent ...

(3 pages) 29 0 3.0 Feb/2004

Subjects: Science Essays > Biology

To investigate the effect of surface area on the rate of reaction using the enzyme Catalase, found in potato, and the substrate Hydrogen Peroxide.

ive site. This is where another molecule(s) can bind with the enzyme. This molecule is known as the substrate. When the substrate binds with the enzyme, a product is produced. Enzymes are specific to ... pecific to their substrate, because the shape of their active site will only fit the shape of their substrate. It is said that the substrate is complimentary to their substrate.When the substrate bind ...

(11 pages) 78 0 4.2 Feb/2004

Subjects: Science Essays

College lab report on enzymes

en returns to its original state, upon which time recycles this process of fusion with its specific substrate.The experiment was to observe what occurs when the enzyme is introduced to a range of temp ... est tubes with 1cm of potato extract. A final addition was made of 1cm of 1% Catechol Solution, the substrate for the potato extract enzyme. After completing each chemical additive, we completely mix ...

(5 pages) 368 0 3.2 Feb/2004

Subjects: Science Essays > Physics

An analysis of immobilised enzymes and suspended enzymes

increased surface area that the yeast suspension provides, as it can mix and spread out amongst the substrate much easier and ore efficiently than the immobilised enzyme. This increased surface area p ... the immobilised enzyme. This increased surface area provides a higher probability of an enzyme and substrate cumin into contact, and forming an enzyme-substrate complex. (When a substrate binds onto ...

(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 used for a v ... 72430.506111722283245622480.25491217222633432450.1212477912182456.Analysis Questions6.1.Question #1:SUBSTRATE: Hydrogen Peroxide (H2O2 (l))PRODUCTS: Water (H2O(l)) and Oxygen gas (O2 (g))6.2.Question ...

(5 pages) 53 0 5.0 Mar/2004

Subjects: Science Essays > Biology

Trypsin Investigation

mI am going to prove that temperature effects the rate in which the enzyme Trypsin breaks down milk substrate into amino acids.Investigation"We strongly recommend the use of Vanish Stain Removal Table ... tions. I think this because these are the conditions they work in the human body. Enzymes allow the substrate to fit into it like a lock and key. The bond on the substrate is degraded and the substrat ...

(4 pages) 33 0 5.0 Mar/2004

Subjects: Science Essays > Biology

Pennuto, Christopher M. 2002. Seasonal Differences in Predator-prey Behavior inExperimental Streams. The American Midland Naturalist: 150:254-267.

his study, Pennuto (2003) uses two stream-dwelling organisms, a mayfly and caddisfly, changed their substrate, and studied fishfly predators eating pattern. He also, studied the movement of predators ... eriment you would need the following: live organism from a river, such as fly eating predators, and substrates from the river. Ephemerella invaria, Hydropsyche venularis, Symphitopsyche walkeri, and S ...

(4 pages) 25 0 4.7 Apr/2004

Subjects: Science Essays > Biology

Enzymes and Their Properties

Most enzymes end in 'ase'. The active site of the enzyme is the part that comes in contact with the substrate, which is the molecule acted on by the enzyme. There are 2 models that show how they work: ... yme is unchanged and can be reused. -Induced Fit Molecule- the active site is not rigid, changes as substrate enters.Properties of Enzymes- A single enzyme molecule can catalyze thousands of substrate ...

(1 pages) 51 0 0.0 May/2004

Subjects: Science Essays > Biology

Fresh water Ecology Josh de Salles

ter plants possess adaptations so that light does not become a limiting factor in their growth.iii) SubstrateStreams that carry a large amount of sediment in suspension (e.g. due to a muddy stream bed ... he break down of sewage, silage can lead to an algal bloom which may cause changes to the effective substrate by trapping and creating organic matter altering the ecology and oxygen levels.Inorganic p ...

(5 pages) 27 0 3.0 Jul/2004

Subjects: Science Essays > Biology

Biology Coursework on Catalyse

gether a small number of amino acids for form the active site (the location on the enzyme where the substrate binds and the reaction takes place (see lock and key theory)) the enzyme itself in unaffec ... n unaffected by the reaction. After having taken place the enzyme is ready to bind again with a new substrate.The Lock and Key TheoryThe Lock and Key theory says that when the substrate attempts to bi ...

(4 pages) 32 0 4.5 Sep/2004

Subjects: Science Essays > Biology

Investigation Of Enzymes And Hydrogen Peroxide

ons. 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 enzyme does no ... 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, range from 20°C to 80°C.I will ...

(4 pages) 42 0 4.3 Dec/2004

Subjects: Science Essays > Biology

Enzyme Investigation.

mes catalyse other types of reactions.Individual enzymes are named by adding ASE to the name of the substrate with which they react. The enzyme that controls urea decomposition is called urease; those ... ther a small number of amino acids to form the active site, or the location on the enzyme where the substrate binds and the reaction takes place. Enzyme and substrate fail to bind if their shapes do n ...

(12 pages) 78 1 4.0 Oct/2005

Subjects: Science Essays > Biology