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Enzymes are active in all cells as well as in the is one of many enzymes in the mammalian intestines that help break down food molecules into piece! enough to be absorbed into our cells. Specifically, lactase breaks the sugar lactose, a disaccharide, into two monomers, glucose and galactose. glucose LOCAGOE Substrate Model 1: Lactase breaks down lactose ● enzyme Subotrate complex 1. Model 1 represents a reaction in which lactose is broken apart with the assistance of the enzyme lactase. Label the following on Model 1: ● Lactose ● Lactase The enzyme-substrate complex (the temporary molecule formed when the substrate is in the active site of the enzyme) The products of the reactions (glucose and galactose) lactose galactose enzyme 2. Using the names of the reactants and products (instead of chemical formulas), write a chemical reaction for the reaction catalyzed in model 1. Hint: Only products and reactants are included in a chemical reaction. lactose + glucose 3. Referring to the chemical reaction you wrote for the question above, is lactase a reactant, a product, or neither? Explain how you know. 4. Describe the role the enzyme lactase played in the reaction. 5. What do you think could happen to the enzyme lactase at the end of the reaction?

Enzymes are active in all cells as well as in the is one of many enzymes in the mammalian intestines that help break down food molecules into piece! enough to be absorbed into our cells. Specifically, lactase breaks the sugar lactose, a disaccharide, into two monomers, glucose and galactose. glucose LOCAGOE Substrate Model 1: Lactase breaks down lactose ● enzyme Subotrate complex 1. Model 1 represents a reaction in which lactose is broken apart with the assistance of the enzyme lactase. Label the following on Model 1: ● Lactose ● Lactase The enzyme-substrate complex (the temporary molecule formed when the substrate is in the active site of the enzyme) The products of the reactions (glucose and galactose) lactose galactose enzyme 2. Using the names of the reactants and products (instead of chemical formulas), write a chemical reaction for the reaction catalyzed in model 1. Hint: Only products and reactants are included in a chemical reaction. lactose + glucose 3. Referring to the chemical reaction you wrote for the question above, is lactase a reactant, a product, or neither? Explain how you know. 4. Describe the role the enzyme lactase played in the reaction. 5. What do you think could happen to the enzyme lactase at the end of the reaction?

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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6. Enzymes play very specific roles in cells, and will work only on specific substrates. For example, while lactase breaks down lactose, lipase is an enzyme that breaks down lipid molecules. Using lipase and lactose as examples, describe how most enzymes are named. 7. Suppose the image below is a model of a different disaccharide, sucrose. Would lactase be able to break down sucrose? Explain your answer in terms of the model. Model 2- The Effect of Denaturing On Enzymes Changes in some environment factors, such as changes in pH or increases in temperature, can disrupt the three-dimensional shape of proteins, including enzymes. Model 2 demonstrates the change in an enzyme that can occur with increasing temperature. A protein that has changed shape due to changes in environmental variables is described as denatured. Model 2: The effect of denaturing on enzymes 1. Using your new knowledge of enzyme active sites, describe why temperature changes can impair an enzyme's ability to catalyze reactions. 2. What questions do you have about enzymes or denaturing enzymes? You must come up with at least one question for further research.
Transcribed Image Text:6. Enzymes play very specific roles in cells, and will work only on specific substrates. For example, while lactase breaks down lactose, lipase is an enzyme that breaks down lipid molecules. Using lipase and lactose as examples, describe how most enzymes are named. 7. Suppose the image below is a model of a different disaccharide, sucrose. Would lactase be able to break down sucrose? Explain your answer in terms of the model. Model 2- The Effect of Denaturing On Enzymes Changes in some environment factors, such as changes in pH or increases in temperature, can disrupt the three-dimensional shape of proteins, including enzymes. Model 2 demonstrates the change in an enzyme that can occur with increasing temperature. A protein that has changed shape due to changes in environmental variables is described as denatured. Model 2: The effect of denaturing on enzymes 1. Using your new knowledge of enzyme active sites, describe why temperature changes can impair an enzyme's ability to catalyze reactions. 2. What questions do you have about enzymes or denaturing enzymes? You must come up with at least one question for further research.
Name: Neveah Part II. Exploring Models of Enzyme Reactions Answer all questions in complete sentences. Model 1- Lactase Breaking Down Lactose Enzymes are active in all cells as well as in the digestive system. Lactase is found in the digestive system, and is one of many enzymes in the mammalian intestines that help break down food molecules into pieces small enough to be absorbed into our cells. Specifically, lactase breaks the sugar lactose, a disaccharide, into two monomers, glucose and galactose. glucose Lactose Substrate Model 1: Lactase breaks down lactose enzyme substrate Complex 1. Model 1 represents a reaction in which lactose is broken apart with the assistance of the enzyme lactase. Label the following on Model 1: Lactose Lactase The enzyme-substrate complex (the temporary molecule formed when the substrate is in the active site of the enzyme) The products of the reactions (glucose and galactose) lactose 2. Using the names of the reactants and products (instead of chemical formulas), write a chemical reaction for the reaction catalyzed in model 1. Hint: Only products and reactants are included in a chemical reaction. → galactose enzyme + glucose 3. Referring to the chemical reaction you wrote for the question above, is lactase a reactant, a product, or neither? Explain how you know. lactose 4. Describe the role the enzyme lactase played in the reaction. 5. What do you think could happen to the enzyme lactase at the end of the reaction?
Transcribed Image Text:Name: Neveah Part II. Exploring Models of Enzyme Reactions Answer all questions in complete sentences. Model 1- Lactase Breaking Down Lactose Enzymes are active in all cells as well as in the digestive system. Lactase is found in the digestive system, and is one of many enzymes in the mammalian intestines that help break down food molecules into pieces small enough to be absorbed into our cells. Specifically, lactase breaks the sugar lactose, a disaccharide, into two monomers, glucose and galactose. glucose Lactose Substrate Model 1: Lactase breaks down lactose enzyme substrate Complex 1. Model 1 represents a reaction in which lactose is broken apart with the assistance of the enzyme lactase. Label the following on Model 1: Lactose Lactase The enzyme-substrate complex (the temporary molecule formed when the substrate is in the active site of the enzyme) The products of the reactions (glucose and galactose) lactose 2. Using the names of the reactants and products (instead of chemical formulas), write a chemical reaction for the reaction catalyzed in model 1. Hint: Only products and reactants are included in a chemical reaction. → galactose enzyme + glucose 3. Referring to the chemical reaction you wrote for the question above, is lactase a reactant, a product, or neither? Explain how you know. lactose 4. Describe the role the enzyme lactase played in the reaction. 5. What do you think could happen to the enzyme lactase at the end of the reaction?
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