Table of contents

1. Introduction to Biochemistry4h 34m
2. Water3h 23m
3. Amino Acids8h 10m
4. Protein Structure10h 4m
5. Protein Techniques14h 5m
6. Enzymes and Enzyme Kinetics13h 38m
7. Enzyme Inhibition and Regulation 8h 42m
8. Protein Function 9h 41m
9. Carbohydrates7h 49m
10. Lipids5h 49m
11. Biological Membranes and Transport 6h 37m
12. Biosignaling9h 45m
Review 1: Nucleic Acids, Lipids, & Membranes2h 47m
Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway3h 12m
Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism2h 26m
Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation1h 48m

1. Introduction to Biochemistry

Proteins

Biochemistry

1. Introduction to Biochemistry

Proteins

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Multiple Choice

Which of the following best describes the molecular structure of ovalbumin?

A homodimeric enzyme with a zinc ion at its active site

A globular glycoprotein composed primarily of alpha-helices and beta-sheets

A membrane-bound protein with extensive transmembrane domains

A fibrous protein consisting mainly of triple helices

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Verified step by step guidance

Step 1: Understand the context of the question. Ovalbumin is a protein found in egg whites, and its molecular structure is key to its function. The question asks you to identify the best description of its structure from the given options.

Step 2: Analyze the options provided. Each option describes a different type of protein structure or function: (1) homodimeric enzyme with a zinc ion, (2) globular glycoprotein with alpha-helices and beta-sheets, (3) membrane-bound protein with transmembrane domains, and (4) fibrous protein with triple helices.

Step 3: Recall the characteristics of ovalbumin. Ovalbumin is known to be a globular protein, meaning it has a compact, spherical shape. It is primarily composed of secondary structures like alpha-helices and beta-sheets, which are stabilized by hydrogen bonds.

Step 4: Eliminate incorrect options. Ovalbumin is not an enzyme, so option (1) is incorrect. It is not membrane-bound, so option (3) is incorrect. It is not fibrous and does not consist of triple helices, so option (4) is incorrect.

Step 5: Confirm the correct answer. Based on its known structure and function, ovalbumin is best described as a globular glycoprotein composed primarily of alpha-helices and beta-sheets, which matches option (2).