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

2. Water

Acids and Bases

Biochemistry

2. Water

Acids and Bases

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Multiple Choice

Which of the following is a characteristic property of bases?

They release H^+ ions in solution.

They have a sour taste.

They react with metals to produce hydrogen gas.

They turn red litmus paper blue.

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Verified step by step guidance

Understand the concept of acids and bases: Acids are substances that release H⁺ ions in solution, while bases are substances that release OH⁻ ions or accept H⁺ ions. Bases typically have properties that are opposite to acids.

Review the characteristic properties of bases: Bases are known to turn red litmus paper blue, have a bitter taste, feel slippery, and do not react with metals to produce hydrogen gas (unlike acids).

Analyze the options provided: The first three options describe properties of acids (release H⁺ ions, sour taste, react with metals to produce hydrogen gas). The fourth option, 'They turn red litmus paper blue,' is a characteristic property of bases.

Recall the role of litmus paper in identifying acids and bases: Red litmus paper turns blue in the presence of a base, while blue litmus paper turns red in the presence of an acid. This is a standard test for distinguishing between acidic and basic substances.

Conclude that the correct answer is: 'They turn red litmus paper blue,' as this is a defining property of bases and aligns with the chemical behavior of basic substances.