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

Proteins are much more difficult to study than DNA because many proteins are modified after which of the following processes?

Transcription

Splicing

Replication

Translation

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Verified step by step guidance

Understand the central dogma of molecular biology, which describes the flow of genetic information: DNA is transcribed into RNA, and RNA is translated into proteins. Proteins are the final product of this process.

Recognize that proteins undergo post-translational modifications (PTMs) after translation. These modifications can include phosphorylation, glycosylation, acetylation, and more, which alter the protein's structure and function.

Compare the processes listed in the question: Transcription involves synthesizing RNA from DNA, Splicing modifies RNA by removing introns, and Replication duplicates DNA. None of these processes involve proteins directly.

Focus on translation, which is the process where ribosomes synthesize proteins using mRNA as a template. After translation, proteins are subject to modifications that make them functional and biologically active.

Conclude that proteins are difficult to study because their structure and function are influenced by these post-translational modifications, which add complexity beyond the genetic code.