Textbook Question
What are some differences between each of the following pairs?
b. an ⍺ helix and collagen
Ch.16 Amino Acids, Proteins, and Enzymes
Timberlake13th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9780134421353
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Table of contents
- Ch.1 Chemistry in Our Lives11
- Ch.2 Chemistry and Measurements80
- Ch.3 Matter and Energy54
- Ch.4 Atoms and Elements51
- Ch.5 Nuclear Chemistry42
- Ch.6 Ionic and Molecular Compounds57
- Ch.7 Chemical Quantities and Reactions41
- Ch.8 Gases29
- Ch.9 Solutions51
- Ch.10 Acids and Bases and Equilibrium65
- Ch.11 Introduction to Organic Chemistry: Hydrocarbons78
- Ch.12 Alcohols, Thiols, Ethers, Aldehydes, and Ketones83
- Ch.13 Carbohydrates54
- Ch.14 Carboxylic Acids, Esters, Amines, and Amides90
- Ch.15 Lipids61
- Ch.16 Amino Acids, Proteins, and Enzymes84
- Ch.17 Nucleic Acids and Protein Synthesis83
- Ch.18 Metabolic Pathways and ATP Production67
Timberlake13th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9780134421353Not the one you use?Change textbook
Chapter 16, Problem 65d
What are some differences between each of the following pairs?
d. dipeptides and tripeptides
Verified step by step guidance1
Understand the terms: A dipeptide is a molecule composed of two amino acids linked by a single peptide bond, while a tripeptide consists of three amino acids linked by two peptide bonds.
Recall the structure of amino acids: Amino acids are the building blocks of peptides and proteins, and they are linked together through peptide bonds formed by a dehydration reaction between the carboxyl group of one amino acid and the amino group of another.
Identify the key difference: The primary difference between dipeptides and tripeptides is the number of amino acids and peptide bonds. Dipeptides have two amino acids and one peptide bond, while tripeptides have three amino acids and two peptide bonds.
Consider the molecular weight: Tripeptides will have a higher molecular weight than dipeptides because they contain an additional amino acid.
Think about their biological roles: Both dipeptides and tripeptides can have distinct biological functions, but tripeptides may have more complex roles due to their additional amino acid, which can influence their structure and activity.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Dipeptides
Dipeptides are molecules formed by the linkage of two amino acids through a peptide bond. This bond occurs when the carboxyl group of one amino acid reacts with the amino group of another, releasing a molecule of water in a condensation reaction. Dipeptides play a role in protein synthesis and can influence various biological functions.
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2:27
Peptides Example 2
Tripeptides
Tripeptides consist of three amino acids connected by two peptide bonds. Similar to dipeptides, the formation of tripeptides involves the condensation of the amino and carboxyl groups of adjacent amino acids. Tripeptides can serve as signaling molecules and may have specific biological activities, often acting as precursors to larger proteins.
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Peptide Bonds
Peptide bonds are the covalent bonds that link amino acids together in proteins and peptides. They are formed through a dehydration synthesis reaction, where the carboxyl group of one amino acid reacts with the amino group of another. The nature of peptide bonds influences the structure and function of proteins, as the sequence and number of amino acids determine the properties of the resulting peptide.
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Related Practice
Textbook Question
Seeds and vegetables are often deficient in one or more essential amino acids. Using the table in problem 16.63, state whether each combination provides all of the essential amino acids.
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c. oatmeal and lima beans
Textbook Question
How do enzymes differ from catalysts used in chemical laboratories?
Textbook Question
Seeds and vegetables are often deficient in one or more essential amino acids. Using the table in problem 16.63, state whether each combination provides all of the essential amino acids.
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a. rice and lima beans
Textbook Question
What are some differences between each of the following pairs?
c. polar and nonpolar amino acids
Textbook Question
If glutamate were replaced by proline in a protein, how might the tertiary structure be affected?