What is the truth about enzyme-catalyzed reactions (ECR)?
Which statement about enzyme-catalyzed reaction is true? The enzyme catalyzed reaction is more efficient than the reaction without it. activation energy. The activation energy barrier is lower in enzymes, which increases the rate of reaction.
Which statement is true of enzyme catalysts?
The role of enzymes in enzyme-catalyzed reactions is to increase the rate at that substrate is converted into products. Which statement about enzyme catalysts is TRUE? They can multiply the rate of a reaction by at least a thousand times.
What are true of enzymes?
Enzymes act as biological catalysts to speed up biochemical reactions. The most common theory is that enzymes attach to substrate molecules and create a transition state. The energy barrier that the substrates must cross to separate them from the products during a reaction is what keeps a reaction moving.
How does an enzyme influence a chemical reaction?
Enzymes are biological catalysts. The activation energy of reactions is lower when catalysts are involved. The faster a reaction proceeds, the lower its activation energy. Enzymes increase the speed of reactions by decreasing activation energy.
What kind of pH level do stomach enzymes function in?
For instance, pepsin is a digestive enzyme found in the stomach. It has an optimal pH of 2. Pepsin, a digestive enzyme found in the stomach, has an optimal pH of around 2.
What pH is best for enzyme activity?
7.8 – 8.7
How does temperature affect lipase?
Temperature affects the action of lipase this way because increasing temperatures (up to around 40 oC) increase the rate of reaction, by increasing the collision rate between the enzyme and substrate molecules (as in any chemical reaction). The optimum temperature for enzyme is where the reaction will occur at its highest rate.
What happens to lipase when the pH changes?
Here, an alkaline solution containing milk, lipase, and phenolphthalein will turn from pink to colorless as the fat in the milk is broken down into fatty acids (and/or glycerol), reducing the pH below 8.3. Temperature affects the time it takes for this reaction to take place.
Is lipase acidic or alkaline?
Function. Gastric lipase, an acidic lipase, is secreted in the stomach by the chief cells of the gastric mucosa. It has a pH optimum between 3-6. The two acidic lipases are gastric lipase and lingual lipase.
Is bile acidic or alkaline?
Bile does not contain acid. It is an alkaline fluid that contains bile salts and bile pigments as well as cholesterol and lecithin. It is made by the liver and stored in the gallbladder. When it is needed to digest fat, it is released intermittently into duodenum (upper part of the small intestinale).
Does lipase work in alkaline conditions?
Lipases active and stable in alkaline media are very attracting, for example, lipase produced by Acinetobacter radioresistens has an optimum pH of 10.0 and it was stable over a pH range of 6.0-10.0; this enzyme has a great potential for application in the detergent industry [23, 24].
Is the colon acidic or alkaline?
After swallowing, food enters the stomach. The pH values of the upper and lower stomachs are different. The pH value of the upper portion is 4-6.5 while that of the lower half is 1.5-4.0. The acidic part enters the intestine, which is slightly alkaline with a pH between 7 and 8.
How can you tell if your body is alkaline or acidic?
The pH levels are used to measure acidity in the body. A simple urine test can be used to determine your body’s pH. The test should be done first thing in the AM to ensure the best accuracy. The body’s acid level can be measured by urine tests.