Enzymes are protein molecules that increase the speed of chemical reactions in the body. They work by combining with and altering the molecules of other chemical substances. There are thousands of different types of enzyme with varied structures that determine their particular activity. The digestive enzymes secreted in the digestive tract split large molecules of food into small units for absorption.…
Enzymes are proteins that are involved in all the chemical 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 enzymes 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'. There are thousands of enzymes in our body but each enzyme is only specialised to do one thing, for example carbohydraise enzymes digest carbohydrates, protease enzymes digest protein.…
Enzymes are biological molecules that catalyze chemical reactions. In enzymatic reactions, the molecules at the beginning of the process, called substrates, are converted into different molecules, called products. Almost all chemical reactions in a biological cell need enzymes in order to occur at rates sufficient for life. Like all catalysts, enzymes work by lowering the activation energy for a reaction, thus dramatically increasing the rate of the reaction. As a result, products are formed faster and reactions reach their equilibrium state more rapidly. Most enzyme reaction rates are millions of times faster than those of comparable un-catalyzed reactions. As with all catalysts, enzymes are not consumed by the reactions they catalyze, nor do they alter the equilibrium of these reactions. However, enzymes do differ from most other catalysts in that they are highly specific for their substrates. Enzymes are known to catalyze about 4,000 biochemical reactions.…
There are many types of enzymes and each has a specific job. Enzymes are particular types of proteins that help to speed up some reactions, such as reactants going to products. One of them is the amylase enzyme. Amylases are found in saliva, and pancreatic secretions of the small intestine. The function of amylase is to break down big molecules of starch into small molecules like glucose; this process is called hydrolysis. Enzymes are very specific; for example, amylase is the only enzyme that will break down starch. It is similar to the theory of the lock and the key. The enzyme is the lock and the key is the substrate; only the correct key could fit into the keyhole of the lock.…
work together in specific orders and create metabolic pathways; this is how enzymes take on the product of other enzymes as substrates. In doing so, catalytic reactions occur and the products formed are then passed onto another enzyme. Enzymes work by lowering the activation energy for reactions; this speeds up the rate of the reaction process as illustrated in figure 3 below (Grisham, 2012).…
An active site is where a substrate fits into place to have its bonds either built or broken.…
Enzymes are globular proteins which catalyse and regulate chemical reactions in all living organisms. Since they are not used up in reactions (but warn down), enzymes can be used over and over again. Enzymes posses an active site; which only recognizes a particular substrate. The shape of this site allows for a particular enzyme to bond with its substrate to form a temporary enzyme-substrate complex. The specificity is referred to as “the lock and key theory”, but in practice works more like a “hand and glove fit”. Once the reaction has occurred, the product(s) break free of the enzyme, leaving it free to catalyse more reactions.…
Enzymes contain specific binding sites, called active sites, where chemical reactions are catalysed and the rest of the protein acts as scaffolding, supporting the active site and allowing it to maintain its proper shape. In a chemical reaction, the reactants, or substrates, binds to the active site of the enzyme, where amino acids are attached to the substrate molecule and held in position while the reaction takes place. This forms…
You can also think of the way enzymes work as a key and a lock, the key is the substrate and the lock is the enzyme. The key should be exactly the right shape to fit in the lock, so does the…
Enzymes are protein, they are used to catalyse metabolisms in all organisms. They break down complex molecules and build up complex molecules from simple molecules, these two processes are catabolic reaction and anabolic reaction respectively. Enzymes are needed in these two processes to catalyse releasing and taking up ATP molecules.…
in that site and this makes the enzyme specific to that substrate. (ONSW HSB, 2002)…
Enzymes have an active site which has a complimentary base to a specific substrate, when these bind an enzyme-substrate complex is formed. There are two hypotheses for the formation of an enzyme-substrate complex; the lock and key hypothesis explains that only one substrate (they key) will fit into the active site (lock). The induced fit hypothesis is when the active site changes shape so that the enzyme moulds itself around the substrate.…
What are enzymes and how do they work? A protein that serves as a biological catalyst, changing the rate of a chemical reaction without itself being changed in the process.…
Enzymes are globular proteins, they are responsible for most of the chemical activities of a living organism. They act as catalysts, substances that affects the reaction of other substances without being destroyed or altered during the process. They are extremely efficient in the body system of living organisms, one enzyme may catalyse over a thousand chemical reactions every second. But there are certain conditions that need to be fulfilled in order for the enzymes to work. Temperature of the environment must be correct for each enzyme because different enzymes will have different temperature ranges in which they can live. pH levels in the environment must also be correct because if the environment around the enzyme is too basic or acidic, the enzyme will quickly denature.…
Enzymes control the rate of metabolic reactions, they act as biological catalysts, which means they are used but not used up and they also control the speed of the reaction. Enzymes are proteins which means that anything that disrupts this structure such as high temperature or change in pH will affect the enzyme activity.…