Biology Enzymes Quiz
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Questions and Answers

What are enzymes and what makes them special?

Enzymes are biological catalysts that speed up chemical reactions by lowering the activation energy.

What classification system is used for enzymes?

The IUB classification of enzymes.

What affects enzyme activity?

Factors such as temperature, pH, enzyme and substrate concentration, and inhibitors.

What is feedback inhibition?

<p>Feedback inhibition is a regulatory mechanism whereby the end product of a metabolic pathway inhibits an enzyme involved in its synthesis.</p> Signup and view all the answers

Which of the following are examples of enzyme classes?

<p>All of the above (D)</p> Signup and view all the answers

What is the role of an enzyme in chemical reactions?

<p>An enzyme speeds up the reaction by lowering the activation energy needed for the reaction to start.</p> Signup and view all the answers

What is maltase and what specificity does it have?

<p>Maltase is an enzyme that targets only the glycosidic bond in maltose, showing bond specificity.</p> Signup and view all the answers

Flashcards

Activation Energy

Energy needed for a chemical reaction to start.

Oxidoreductases

Enzyme class that catalyzes redox reactions (oxidation-reduction).

Transferases

Enzyme class that catalyzes transfer of functional groups between molecules.

IUB Enzyme Classification

System for classifying enzymes based on the reactions they catalyze.

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Hydrolases

Enzyme class that catalyzes hydrolysis reactions (breaking bonds by adding water).

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Enzyme

Biological catalyst that speeds up chemical reactions in living organisms by lowering the activation energy.

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Lyases

Enzyme class that catalyzes the breaking of bonds by elimination or addition, forming double bonds.

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Isomerases

Enzyme class that catalyzes structural rearrangements within a single molecule (same formula, different structure).

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Ligases

Enzyme class that catalyzes joining of two molecules, often coupled to ATP hydrolysis.

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Enzyme Specificity

Enzymes' ability to catalyze only certain reactions or substrates.

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