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 an accurate description of proteins?

Proteins are made up of nucleotides joined by phosphodiester bonds.

Proteins primarily serve as genetic material in cells.

Proteins are hydrophobic molecules that do not interact with water.

Proteins are polymers composed of amino acid monomers linked by peptide bonds.

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Verified step by step guidance

Understand the structure of proteins: Proteins are macromolecules composed of amino acids, which are the building blocks of proteins. Amino acids are linked together by peptide bonds to form polypeptide chains.

Clarify the incorrect options: Proteins are not made up of nucleotides (those are the building blocks of nucleic acids like DNA and RNA). Proteins do not primarily serve as genetic material; that role is fulfilled by nucleic acids. Proteins are not exclusively hydrophobic; they can have both hydrophobic and hydrophilic regions depending on their amino acid composition.

Focus on the correct description: Proteins are polymers composed of amino acid monomers. These amino acids are joined together by peptide bonds, which are formed through a dehydration reaction between the amino group of one amino acid and the carboxyl group of another.

Explain the role of peptide bonds: Peptide bonds are covalent bonds that provide structural integrity to the protein chain. The sequence of amino acids in the chain determines the protein's primary structure, which ultimately influences its function.

Summarize the key concept: Proteins are essential biomolecules in cells, performing a wide range of functions such as catalysis (enzymes), structural support, transport, and signaling. Their structure and function are directly related to their composition as polymers of amino acids linked by peptide bonds.