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 about proteins is correct?

Proteins are the primary source of genetic information in cells.

All proteins function as enzymes in biological systems.

Proteins are composed of amino acids linked by peptide bonds.

Proteins are made up of nucleotides joined by phosphodiester bonds.

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Verified step by step guidance

Step 1: Begin by understanding the structure of proteins. Proteins are macromolecules composed of smaller building blocks called amino acids. These amino acids are linked together by peptide bonds, which are covalent bonds formed between the carboxyl group of one amino acid and the amino group of another.

Step 2: Analyze the first statement: 'Proteins are the primary source of genetic information in cells.' This is incorrect because genetic information is stored in nucleic acids (DNA and RNA), not proteins.

Step 3: Evaluate the second statement: 'All proteins function as enzymes in biological systems.' This is also incorrect because, while many proteins are enzymes, others serve structural, transport, signaling, or immune functions, among others.

Step 4: Examine the third statement: 'Proteins are composed of amino acids linked by peptide bonds.' This is correct because it accurately describes the primary structure of proteins.

Step 5: Review the fourth statement: 'Proteins are made up of nucleotides joined by phosphodiester bonds.' This is incorrect because nucleotides joined by phosphodiester bonds form nucleic acids (DNA and RNA), not proteins.