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

Glutaraldehyde is commonly used as a cross-linking agent in biochemistry. It primarily affects which type of macromolecules?

Lipids

Proteins

Polysaccharides

Nucleic acids

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Verified step by step guidance

Understand the role of glutaraldehyde: Glutaraldehyde is a bifunctional molecule that acts as a cross-linking agent, meaning it can form covalent bonds between molecules, stabilizing their structure.

Identify the chemical groups targeted by glutaraldehyde: Glutaraldehyde primarily reacts with amino groups (-NH2) found in macromolecules. These groups are abundant in proteins, specifically in the side chains of lysine residues.

Analyze the macromolecules listed in the problem: Proteins contain amino groups in their structure, making them the primary target for glutaraldehyde cross-linking. Lipids, polysaccharides, and nucleic acids do not have significant free amino groups for glutaraldehyde to react with.

Consider the biochemical applications: Glutaraldehyde is widely used in protein cross-linking for applications such as enzyme immobilization, tissue fixation, and structural studies, further confirming its specificity for proteins.

Conclude the reasoning: Based on the chemical reactivity of glutaraldehyde and its applications, proteins are the macromolecules primarily affected by glutaraldehyde cross-linking.