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

6. Enzymes and Enzyme Kinetics

Electrostatic and Metal Ion Catalysis

Biochemistry

6. Enzymes and Enzyme Kinetics

Electrostatic and Metal Ion Catalysis

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Multiple Choice

Which of the following best applies to metal ion catalysis?

A covalent bond forms between enzyme and substrate.

Catalyst may participate in oxidation-reduction reactions by changes in the oxidation state.

May use amino acids such as aspartate or lysine for protonation or proton abstraction.

Uses nucleophilic functional groups.

Lowers the energy of the transition state.

a & d.

b & e.

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Verified step by step guidance

Understand the concept of metal ion catalysis: Metal ions can act as catalysts in biochemical reactions by stabilizing charged intermediates, participating in oxidation-reduction reactions, or helping to orient substrates properly.

Identify the role of metal ions in oxidation-reduction reactions: Metal ions can change their oxidation state, which allows them to participate in electron transfer processes. This is a key feature of metal ion catalysis.

Recognize the role of metal ions in lowering the energy of the transition state: Metal ions can stabilize the transition state of a reaction, effectively lowering the activation energy required for the reaction to proceed.

Evaluate the given options: Option b ('Catalyst may participate in oxidation-reduction reactions by changes in the oxidation state') and option e ('Lowers the energy of the transition state') both describe characteristics of metal ion catalysis.

Conclude that the correct answer is b & e, as these options accurately reflect the roles that metal ions play in catalysis.