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 protein modification is most closely linked to targeting proteins for degradation in eukaryotic cells?

Acetylation

Phosphorylation

Glycosylation

Ubiquitination

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Verified step by step guidance

Understand the concept of protein modifications: Protein modifications are chemical changes made to proteins after their synthesis. These modifications can alter protein function, localization, or stability.

Learn about ubiquitination: Ubiquitination is a post-translational modification where ubiquitin, a small regulatory protein, is covalently attached to a target protein. This process often marks proteins for degradation via the proteasome in eukaryotic cells.

Compare ubiquitination with other modifications: Acetylation typically regulates gene expression by modifying histones, phosphorylation is involved in signal transduction and enzyme activity regulation, and glycosylation affects protein folding and stability. None of these are primarily linked to protein degradation.

Recognize the role of ubiquitination in protein degradation: Ubiquitination tags proteins for destruction by the proteasome, a large protein complex responsible for degrading and recycling damaged or unneeded proteins in eukaryotic cells.

Conclude that ubiquitination is the correct answer: Based on its function in targeting proteins for degradation, ubiquitination is the protein modification most closely linked to this process in eukaryotic cells.