Domanda del libro di testo
What is meant by the following terms as they apply to protein structure, and what bonds or molecular interactions stabilize that level of structure?
b. Secondary structure
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Ch.18 Amino Acids and Proteins
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187
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TOC.tableOfContents
- Ch.1 Matter and Measurements27
- Ch.2 Atoms and the Periodic Table20
- Ch.3 Ionic Compounds8
- Ch.4 Molecular Compounds23
- Ch.5 Classification & Balancing of Chemical Reactions12
- Ch.6 Chemical Reactions: Mole and Mass Relationships28
- Ch.7 Chemical Reactions: Energy, Rate and Equilibrium64
- Ch.8 Gases, Liquids and Solids24
- Ch.9 Solutions52
- Ch.10 Acids and Bases25
- Ch.11 Nuclear Chemistry22
- Ch.12 Introduction to Organic Chemistry: Alkanes57
- Ch.13 Alkenes, Alkynes, and Aromatic Compounds47
- Ch.14 Some Compounds with Oxygen, Sulfur, or a Halogen50
- Ch.15 Aldehydes and Ketones45
- Ch.16 Amines42
- Ch.17 Carboxylic Acids and Their Derivatives57
- Ch.18 Amino Acids and Proteins82
- Ch.19 Enzymes and Vitamins63
- Ch.20 Carbohydrates44
- Ch.21 The Generation of Biochemical Energy65
- Ch.22 Carbohydrate Metabolism45
- Ch.23 Lipids42
- Ch.24 Lipid Metabolism33
- Ch.25 Protein and Amino Acid Metabolism24
- Ch.26 Nucleic Acids and Protein Synthesis45
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187Non è quello che usi tu?Cambia libro di testo
Capitolo 18, Problema 77
Is the bond formed between each pair in Problem 18.76 covalent or noncovalent?
a. Cysteine and cysteine
b. Alanine and leucine
c. Aspartic acid and asparagine
d. Serine and lysine
Guida verificata passo dopo passo1
Identify the elements in each pair from Problem 18.76 and determine their positions on the periodic table. This will help assess their electronegativity values.
Recall that a covalent bond is formed when two atoms share electrons, typically occurring between nonmetals with similar electronegativity values. Noncovalent interactions, on the other hand, include ionic bonds (formed between metals and nonmetals) and other weaker interactions like hydrogen bonds or van der Waals forces.
Compare the electronegativity values of the two elements in each pair. If the difference in electronegativity is small (generally less than 1.7), the bond is likely covalent. If the difference is large, the bond is likely ionic (a type of noncovalent interaction).
Consider the type of elements involved: if both are nonmetals, the bond is likely covalent. If one is a metal and the other is a nonmetal, the bond is likely ionic.
Classify each pair based on the above criteria, labeling the bond as covalent or noncovalent (ionic or other noncovalent interaction).
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Covalent Bonds
Covalent bonds are formed when two atoms share one or more pairs of electrons, resulting in a stable balance of attractive and repulsive forces between the atoms. This type of bond typically occurs between nonmetals and is characterized by the strength and stability it provides to molecules. An example is the bond between hydrogen and oxygen in water (H2O).
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Percorso guidato
01:04
Covalent Bonds Example 1
Noncovalent Interactions
Noncovalent interactions are weaker than covalent bonds and do not involve the sharing of electrons. These interactions include hydrogen bonds, ionic bonds, van der Waals forces, and hydrophobic interactions. They play crucial roles in biological processes, such as the folding of proteins and the binding of substrates to enzymes.
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2:41Interactions within the Tertiary Structure Concept 2
Bond Polarity
Bond polarity refers to the distribution of electrical charge over the atoms joined by the bond. In covalent bonds, if the atoms have different electronegativities, the shared electrons may be pulled closer to one atom, creating a polar covalent bond. Understanding bond polarity is essential for determining the nature of interactions between molecules, including whether they are covalent or noncovalent.
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01:34Molecular Polarity (Simplified) Concept 1
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Domanda del libro di testo
What is meant by the following terms as they apply to protein structure, and what bonds or molecular interactions stabilize that level of structure?
a. Primary structure
772
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Domanda del libro di testo
What kind of bond would you expect between the side chains of the following amino acids?
c. Aspartic acid and asparagine
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What is meant by the following terms as they apply to protein structure, and what bonds or molecular interactions stabilize that level of structure?
d. Quaternary structure
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What kind of bond would you expect between the side chains of the following amino acids?
b. Alanine and leucine
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Domanda del libro di testo
Give an example of a protein containing primarily alpha-helices. Is this a fibrous or globular protein?
413
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