Textbook Question
Collagen contains an amino acid that is a modified form of the naturally occurring amino acid.
a. Name the natural amino acid.
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Ch.10 Proteins Workers of the Cell
Frost4th EditionGeneral, Organic and Biological ChemistryISBN: 9780134988696
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Table of contents
- Ch.4 Introduction to Organic Compounds75
- Ch.5 Chemical Reactions19
- Ch.6 Carbohydrates Life's Sweet Molecules62
- Ch.7 States of Matter and Their Attractive Forces8
- Ch.8 Solution Chemistry Sugar and Water Do Mix4
- Ch.10 Proteins Workers of the Cell89
- Ch.11 Nucleic Acids Big Molecules with a Big Role69
- Ch.12 Food as Fuel An Overview of Metabolism65
Frost4th EditionGeneral, Organic and Biological ChemistryISBN: 9780134988696Not the one you use?Change textbook
Chapter 6, Problem 84(3)
Match the terms (3) substrate with the following descriptions:
a. has a tertiary structure that recognizes the substrate
b. is the combination of an enzyme with the substrate
c. has a structure that fits the active site of an enzyme
Verified step by step guidance1
Step 1: Understand the key terms in the problem. A 'substrate' is the molecule upon which an enzyme acts. Enzymes are biological catalysts that speed up chemical reactions by lowering the activation energy. The 'active site' is the specific region on the enzyme where the substrate binds.
Step 2: Analyze description (a): 'has a tertiary structure that recognizes the substrate.' This description refers to the enzyme itself, as enzymes have a specific three-dimensional (tertiary) structure that allows them to recognize and bind to their substrate.
Step 3: Analyze description (b): 'is the combination of an enzyme with the substrate.' This description refers to the enzyme-substrate complex, which forms when the substrate binds to the active site of the enzyme.
Step 4: Analyze description (c): 'has a structure that fits the active site of an enzyme.' This description refers to the substrate, as it must have a complementary shape to fit into the enzyme's active site, following the lock-and-key or induced fit model.
Step 5: Match the terms to the descriptions: (a) corresponds to the enzyme, (b) corresponds to the enzyme-substrate complex, and (c) corresponds to the substrate.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Enzyme Structure
Enzymes are biological catalysts that speed up chemical reactions in the body. They have a specific three-dimensional shape, known as tertiary structure, which is crucial for their function. This structure allows enzymes to recognize and bind to specific substrates, facilitating the conversion of substrates into products.
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Intro to Enzymes Concept 1
Enzyme-Substrate Complex
The enzyme-substrate complex is formed when an enzyme binds to its specific substrate. This interaction is essential for the catalytic activity of the enzyme, as it lowers the activation energy required for the reaction. The formation of this complex is a key step in enzyme kinetics and is fundamental to understanding how enzymes function.
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2:32Enzyme-Substrate Complex Concept 1
Active Site
The active site of an enzyme is the region where substrate molecules bind. It has a unique shape and chemical environment that allows it to interact specifically with the substrate. The fit between the active site and the substrate is often described by the 'lock and key' model, emphasizing the specificity of enzyme action.
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Related Practice
Textbook Question
Match the terms (1) ES with the following descriptions:
a. has a tertiary structure that recognizes the substrate
b. is the combination of an enzyme with the substrate
c. has a structure that fits the active site of an enzyme
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Textbook Question
Match the terms (2) enzyme with the following descriptions:
a. has a tertiary structure that recognizes the substrate
b. is the combination of an enzyme with the substrate
c. has a structure that fits the active site of an enzyme
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Textbook Question
Match the terms (1) active site, (2) lock-and-key model, and (3) induced-fit model with the following descriptions:
a. the portion of an enzyme where catalytic activity occurs
b. the active site adapts to the shape of a substrate
c. the active site has a rigid shape
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Textbook Question
Do the amino acids that are in the active site of an enzyme have to be near each other in the enzyme’s primary structure? If no, explain.
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Textbook Question
The enzyme trypsin catalyzes the breakdown of many structurally diverse proteins in foods. Does the induced-fit or lock-and-key model explain the action of trypsin better? Explain.
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