Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

19. Enzymes

Enzyme Classification

GOB Chemistry

19. Enzymes

Enzyme Classification

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0:41 minutes

Problem 76a

Textbook Question

Give the substrate of each of the following enzymes:
a. maltase

Verified step by step guidance

Understand the role of enzymes: Enzymes are biological catalysts that speed up chemical reactions by binding to specific molecules called substrates. The name of an enzyme often gives a clue about its substrate or the reaction it catalyzes.

Analyze the enzyme name 'maltase': The suffix '-ase' indicates that this is an enzyme, and the root 'malt-' suggests a connection to maltose, a type of sugar.

Recall the function of maltase: Maltase is an enzyme that catalyzes the hydrolysis of maltose into two glucose molecules. Hydrolysis is a reaction where water is used to break a bond.

Identify the substrate: Based on the enzyme's name and function, the substrate of maltase is maltose, a disaccharide composed of two glucose units linked by a glycosidic bond.

Conclude: The substrate of maltase is maltose, and the enzyme facilitates its breakdown into glucose molecules during digestion.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Enzyme Substrate Specificity

Enzyme substrate specificity refers to the unique ability of an enzyme to bind to a specific substrate, which is the molecule upon which the enzyme acts. This specificity is determined by the enzyme's active site, where the substrate fits like a key in a lock. Understanding this concept is crucial for identifying the correct substrate for any given enzyme.

Maltase Function

Maltase is an enzyme that catalyzes the hydrolysis of maltose, a disaccharide sugar, into two glucose molecules. This reaction is essential in carbohydrate digestion, particularly in breaking down starches into simpler sugars that can be absorbed by the body. Recognizing maltase's function helps in understanding its substrate and role in metabolic processes.

Carbohydrate Metabolism

Carbohydrate metabolism encompasses the biochemical processes that convert carbohydrates into energy and other metabolites. This includes the breakdown of complex carbohydrates into simple sugars, which are then utilized for energy production. Knowledge of carbohydrate metabolism is important for comprehending how enzymes like maltase contribute to overall energy homeostasis in living organisms.

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Ethylene glycol (HO—CH₂—CH₂—OH) is a major component of antifreeze. If ingested, it is first converted to HOOC—CHO (oxoethanoic acid) and then to HOOC—COOH (oxalic acid), which is toxic.

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a. What class of enzyme catalyzes the reactions described?

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Textbook Question

Adults who are lactose intolerant cannot break down the disaccharide in milk products. To help digest dairy food, a product known as Lactaid can be added to milk and the milk then refrigerated for 24 hours.

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a. What enzyme is present in Lactaid, and what is the major class of this enzyme?

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Textbook Question

Indicate whether each of the following would be a substrate (S) or an enzyme (E):

a. glucose

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Textbook Question

Give the substrate of each of the following enzymes:

a. urease

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Textbook Question

Does each of the following statements describe a simple enzyme (no cofactor or coenzyme necessary), an enzyme that requires a cofactor, or an enzyme that requires a coenzyme?

b. consists of one polypeptide chain in its active form

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Textbook Question

Does each of the following statements describe a simple enzyme (no cofactor or coenzyme necessary), an enzyme that requires a cofactor, or an enzyme that requires a coenzyme?

c. contains vitamin B₆ in its active site

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Textbook Question

Adults who are lactose intolerant cannot break down the disaccharide in milk products. To help digest dairy food, a product known as Lactaid can be given prior to consuming dairy products. (16.4, 16.5)

a. What is the name of enzyme present in Lactaid, and what is the major class of this enzyme?

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Multiple Choice

Which of the following could be the possible name of enzyme that involves the transference of a phosphate group between substrates?

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