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

18. Amino Acids and Proteins

Summary of Protein Structure

GOB Chemistry

18. Amino Acids and Proteins

Summary of Protein Structure

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Problem 30b

Textbook Question

For each of the conjugated proteins described, identify to which class of conjugated protein it belongs.
b. Ionized zinc is attached to this protein so the protein can function.

Verified step by step guidance

Step 1: Understand the definition of a conjugated protein. A conjugated protein is a protein that is combined with a non-protein component, called a prosthetic group, which is essential for its function.

Step 2: Identify the type of prosthetic group attached to the protein in the problem. In this case, the prosthetic group is ionized zinc.

Step 3: Recall the classification of conjugated proteins based on their prosthetic groups. Proteins with metal ions as their prosthetic group are classified as metalloproteins.

Step 4: Confirm that the protein described in the problem fits the definition of a metalloprotein. Since ionized zinc is a metal ion and is essential for the protein's function, this protein belongs to the metalloprotein class.

Step 5: Conclude that the protein described in the problem is a metalloprotein, as it contains ionized zinc as its prosthetic group.

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Key Concepts

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

Conjugated Proteins

Conjugated proteins are complex molecules formed by the combination of a protein with a non-protein component, known as a prosthetic group. These non-protein components can include metal ions, carbohydrates, or lipids, which are essential for the protein's biological function. Understanding the classification of conjugated proteins is crucial for identifying their roles in various biochemical processes.

Metal Ions as Prosthetic Groups

Metal ions, such as zinc, can serve as prosthetic groups that are tightly bound to proteins, enabling them to perform specific functions. In the case of zinc, it often plays a critical role in enzyme activity, structural stability, and regulation of biological processes. Recognizing the importance of these metal ions helps in understanding how proteins interact with their environment and catalyze reactions.

Classes of Conjugated Proteins

Conjugated proteins can be classified into several categories based on their prosthetic groups. For instance, metalloproteins contain metal ions, glycoproteins have carbohydrate moieties, and lipoproteins are associated with lipids. Identifying the class of a conjugated protein is essential for understanding its function and the biochemical pathways it participates in.

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Textbook Question

Determine whether each of the following statements describes the primary, secondary, tertiary, or quaternary structure of a protein.

b. Hydrogen bonds form between adjacent segments of the backbone of the same protein to form a “folded-fan” structure.

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Textbook Question

Determine whether each of the following statements describes the primary, secondary, tertiary, or quaternary structure of a protein.

d. Amino acids react in a condensation reaction to form a peptide bond.

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Textbook Question

Insulin is a protein hormone that functions as two polypeptide chains whose amino acid sequences are as follows:

A chain: GIVEQCCTSICSLTQLENYCN

B chain: FVNQHLCGDHLVEALYLV CGERGFFYTPKT

b. Considering the amino acid sequences, suggest how these two polypeptide chains might be held together in an active insulin molecule.

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Textbook Question

Explain how a protein is denatured by the following:

c. Organic solvents

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Textbook Question

For each of the conjugated proteins described, identify to which class of conjugated protein it belongs.

c. Phosphate groups are attached to this protein.

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Textbook Question

What level of protein structure is determined by the following:

a. Peptide bonds between amino acids?

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Textbook Question

What level of protein structure is determined by the following:

b. Hydrogen bonds between backbone carbonyl oxygen atoms and hydrogen atoms attached to backbone nitrogen atoms?

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Textbook Question

How do the following noncovalent interactions help to stabilize the tertiary and quaternary structure of a protein? Give an example of a pair of amino acids that could give rise to each interaction.

a. Hydrophobic interactions

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