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 statements is most true regarding proteins as macromolecules and their functions?

Proteins are composed of monosaccharide units linked by glycosidic bonds.

Proteins function mainly as long-term energy storage molecules.

Proteins serve as enzymes, structural components, and signaling molecules in cells.

Proteins are primarily responsible for storing genetic information.

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Verified step by step guidance

Step 1: Begin by identifying the basic building blocks of proteins. Proteins are composed of amino acids, not monosaccharides. Monosaccharides are the building blocks of carbohydrates, which are linked by glycosidic bonds. Proteins are linked by peptide bonds formed between amino acids.

Step 2: Evaluate the statement about proteins functioning as long-term energy storage molecules. Proteins are not primarily used for energy storage; this role is typically fulfilled by lipids (e.g., triglycerides) and carbohydrates (e.g., glycogen). Proteins have more specialized roles in the cell.

Step 3: Analyze the statement that proteins serve as enzymes, structural components, and signaling molecules. This is accurate. Proteins act as enzymes to catalyze biochemical reactions, provide structural support (e.g., collagen in connective tissues), and function in cell signaling (e.g., hormones like insulin).

Step 4: Examine the statement that proteins are responsible for storing genetic information. This is incorrect. Genetic information is stored in nucleic acids, such as DNA and RNA, not proteins.

Step 5: Conclude that the most accurate statement regarding proteins is that they serve as enzymes, structural components, and signaling molecules in cells. This reflects their diverse and essential roles in biological systems.