Table of contents

1. Intro to General Chemistry3h 48m
2. Atoms & Elements4h 16m
3. Chemical Reactions4h 10m
4. BONUS: Lab Techniques and Procedures1h 38m
5. BONUS: Mathematical Operations and Functions48m
6. Chemical Quantities & Aqueous Reactions3h 53m
7. Gases3h 49m
8. Thermochemistry2h 37m
9. Quantum Mechanics2h 58m
10. Periodic Properties of the Elements3h 9m
11. Bonding & Molecular Structure3h 29m
12. Molecular Shapes & Valence Bond Theory1h 57m
13. Liquids, Solids & Intermolecular Forces2h 23m
14. Solutions3h 1m
15. Chemical Kinetics2h 53m
16. Chemical Equilibrium2h 29m
17. Acid and Base Equilibrium5h 1m
18. Aqueous Equilibrium4h 47m
19. Chemical Thermodynamics1h 50m
20. Electrochemistry2h 42m
21. Nuclear Chemistry2h 36m
22. Organic Chemistry5h 7m
23. Chemistry of the Nonmetals2h 39m
24. Transition Metals and Coordination Compounds3h 16m

15. Chemical Kinetics

Catalyst

General Chemistry

15. Chemical Kinetics

Catalyst

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Multiple Choice

Which substances are responsible for accelerating chemical reactions in cells?

Buffers

Enzymes

Substrates

Inhibitors

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Verified step by step guidance

Understand the role of enzymes in biological systems: Enzymes are biological catalysts that speed up chemical reactions in cells by lowering the activation energy required for the reaction to occur.

Differentiate between enzymes and other substances: Buffers maintain pH levels, substrates are the reactants in enzyme-catalyzed reactions, and inhibitors slow down or stop reactions. Enzymes, on the other hand, accelerate reactions.

Recognize the specificity of enzymes: Enzymes are highly specific to their substrates, meaning each enzyme only catalyzes a specific reaction or set of reactions.

Consider the effect of enzymes on reaction rates: Enzymes increase the rate of chemical reactions without being consumed in the process, allowing them to be used repeatedly.

Conclude that enzymes are the substances responsible for accelerating chemical reactions in cells, distinguishing them from buffers, substrates, and inhibitors.