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Questions and Answers
What role do enzymes play in chemical reactions within living cells?
What role do enzymes play in chemical reactions within living cells?
- They are consumed during the reaction.
- They are the primary reactants.
- They speed up the reactions without being used up. (correct)
- They slow down the reactions.
In an enzyme catalyzed degradation reaction, how does the size of the substrate compare to the product?
In an enzyme catalyzed degradation reaction, how does the size of the substrate compare to the product?
- The substrate is larger than the product. (correct)
- The substrate is smaller than the product.
- The substrate is broken down into molecules of varying size.
- The substrate and the product are the same size.
What happens to an enzyme's activity if it becomes denatured?
What happens to an enzyme's activity if it becomes denatured?
- The enzyme becomes more active.
- The enzyme’s active site binds perfectly with the substrate.
- The enzyme's active site changes shape which no longer fits with the substrate. (correct)
- The enzyme's activity increases, having no impact on the shape.
How is the active site of an enzyme related to its substrate?
How is the active site of an enzyme related to its substrate?
What are the reactants in a reaction with a catalyst that results in the production of oxygen and water?
What are the reactants in a reaction with a catalyst that results in the production of oxygen and water?
Flashcards
Enzymes
Enzymes
Biological catalysts made of proteins, speeding up chemical reactions in living cells without being consumed.
Active Site
Active Site
The specific region on an enzyme where the substrate binds.
Degradation (Enzyme Reaction)
Degradation (Enzyme Reaction)
A reaction involving the breakdown of a large molecule into smaller molecules.
Synthesis (Enzyme Reaction)
Synthesis (Enzyme Reaction)
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Optimum Temperature/pH for Enzymes
Optimum Temperature/pH for Enzymes
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Study Notes
Enzyme Structure and Function
- Enzymes are biological catalysts, composed of proteins.
- Proteins are made of amino acids linked in polypeptide chains.
- Enzymes speed up reactions without being consumed.
- An enzyme's shape is crucial; its active site complements the substrate's shape.
Types of Enzyme Reactions
- Degradation reactions break down a large substrate into multiple smaller products.
- Synthesis reactions build up multiple smaller substrates into a larger product.
- Example: Hydrogen peroxide + catalyst → oxygen + water (catalysis reaction)
Enzyme Activity and Denaturation
- Enzymes function optimally at specific temperatures and pH levels.
- Changes in temperature or pH can cause enzymes to denature.
- Denaturation alters the enzyme's shape, making the active site non-complementary to the substrate.
- This reduces the reaction rate.
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