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

Gibbs Free Energy

Biochemistry

1. Introduction to Biochemistry

Gibbs Free Energy

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Multiple Choice

What is the standard free energy change (\( \Delta G^\circ' \)) for the hydrolysis of ATP to ADP under standard biochemical conditions?

\( -7.3 \ \mathrm{kJ/mol} \)

\( 0 \ \mathrm{kJ/mol} \)

\( -30.5 \ \mathrm{kJ/mol} \)

\( +30.5 \ \mathrm{kJ/mol} \)

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Verified step by step guidance

Understand the concept of standard free energy change ( abla G^ ext{o'}): It represents the energy released or absorbed during a reaction under standard biochemical conditions (pH 7, 25°C, 1 M concentration of reactants and products). For ATP hydrolysis, this value is typically negative, indicating that the reaction is exergonic (releases energy).

Recall the reaction for ATP hydrolysis: ATP + H2O → ADP + Pi (inorganic phosphate). This reaction is highly favorable and releases energy, which is why ATP is often referred to as the 'energy currency' of the cell.

Consult biochemical data tables: The standard free energy change ( abla G^ ext{o'}) for ATP hydrolysis is a well-documented value in biochemistry. It is typically around -30.5 kJ/mol under standard conditions, reflecting the energy released during the reaction.

Compare the given options: Analyze the provided values (-7.3 kJ/mol, 0 kJ/mol, -30.5 kJ/mol, +30.5 kJ/mol). Based on biochemical knowledge, the correct value for ATP hydrolysis under standard conditions is -30.5 kJ/mol.

Conclude the reasoning: The negative sign of abla G^ ext{o'} indicates that the reaction is energetically favorable and releases energy. This aligns with the role of ATP in driving cellular processes by coupling its hydrolysis to energy-requiring reactions.