Questions and Answers
What is activation energy?
What is the function of the active site on an enzyme?
It is the location where substrates bind and react.
What is adenosine triphosphate (ATP)?
A molecule that can be hydrolyzed to release free energy.
What is a catalyst?
Signup and view all the answers
What is the role of an enzyme?
Signup and view all the answers
Exergonic reactions occur spontaneously with the release of free energy.
Signup and view all the answers
In exergonic reactions, the free energy of the products is greater than that of the reactants.
Signup and view all the answers
What does the induced-fit model describe?
Signup and view all the answers
What is the lock-and-key model?
Signup and view all the answers
What are substrates?
Signup and view all the answers
What is the transition state in a chemical reaction?
Signup and view all the answers
Study Notes
Activation Energy and Enzymes
- Activation Energy: Energy needed to initiate a chemical reaction by reaching the transition state.
- Active Site: Specific region on an enzyme where substrates bind and undergo a chemical reaction.
Energy Transfer and Molecules
- Adenosine Triphosphate (ATP): Molecule that stores and transfers energy in cells; it can be hydrolyzed to release free energy.
- Catalyst: Substance that decreases the activation energy of a reaction, enhancing reaction speed.
Reaction Dynamics
- Exergonic Reactions: Reactions that release free energy and occur spontaneously; products have less free energy than reactants.
- In exergonic reactions, the energy state of reactants is higher than that of the products.
Enzyme Models
- Induced-Fit Model: Suggests enzymes undergo a conformational change upon substrate binding, called induced fit, enhancing the catalysis.
- Lock-and-Key Model: Proposes a rigid enzyme structure acting as a lock that substrates, acting as keys, fit into perfectly before reaction.
Substrates and Reaction Intermediates
- Substrate: Reactant on which an enzyme acts, determining specificity and efficiency of enzymatic reactions.
- Transition State: Short-lived state during a reaction characterized by partial bonds of both old and new structures, critical for reaction progression.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on key concepts from Chapter 3 of biochemistry focusing on activation energy and enzyme interactions. These flashcards cover critical terms like activation energy, active sites, and ATP, essential for understanding biochemical reactions.
