Questions and Answers
Which is the best definition of activation energy?
If the activation energy required for a chemical reaction were reduced, what would happen to the rate of the reaction?
Lactase and carbonic anhydrase are examples of what type of substance?
What is a substrate?
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Photosynthesis is an example of?
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What is the best method for a researcher to determine if substance A affects the reaction rate of liquids X and Y?
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Which two substances bind using a lock-and-key mechanism?
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A substance that influences the reaction but does not participate in the reaction is a __________.
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Which statement best describes the amount of catalyst that remains at the end of a reaction?
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Which statement best describes how a catalyst can speed up a chemical reaction?
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Study Notes
Activation Energy
- Activation energy is the energy required to break the bonds of reactant molecules in a chemical reaction.
- Lowering activation energy increases the reaction rate.
Enzymes
- Lactase and carbonic anhydrase are examples of enzymes, which are catalysts that speed up reactions.
- Enzymes bind to substrates through a lock-and-key mechanism, allowing for specific reactions to occur.
Substrates
- A substrate is a reactant that is catalyzed by an enzyme, facilitating the conversion into products during a reaction.
Photosynthesis
- Photosynthesis is categorized as an endothermic reaction, which absorbs energy rather than releasing it.
Catalyst
- A catalyst is a substance that influences a reaction's rate without being consumed in the process; it remains unchanged after the reaction.
- The amount of catalyst present at the end of a reaction is the same as at the beginning.
Experimental Methodology
- To determine if an inorganic substance (A) affects the reaction rate of colored liquids (X and Y), the time taken for the liquid to become clear should be measured with and without substance A.
- This approach identifies whether substance A acts as a catalyst.
Catalyst Mechanism
- A catalyst speeds up a chemical reaction by making lower energy pathways available, facilitating the reaction without altering the reactants or products’ concentration directly.
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Description
Test your understanding of catalysts and activation energy with these flashcards designed for BAMS Cohort 6. Each card presents definitions and critical concepts related to chemical reactions and their energetic contexts. Perfect for quick reviews and enhancing your grasp of biochemistry.