Enzymes and Catalysts Quiz

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What are enzymes?

Substances that provide heat and vigorous stirring to speed up chemical reactions
Small reactants that bind to large proteins
Catalysts that are permanently affected in the reaction
Proteins that speed up the rate of a chemical reaction without being consumed (correct)

Where do substrates bind to enzymes?

On the surface of the enzyme
At the active site (correct)
Within the enzyme-substrate complex
Outside the enzyme molecule

What is the resulting structure when the enzyme and substrate are bound?

Catalytic structure
Catalyzed complex
Enzyme-substrate complex (correct)
Protein complex

What happens to the original enzyme molecules after all the reactants have been converted to products?

Remain unchanged (C) Signup and view all the answers

Why are enzymes very specific to which substrates they will bind to?

They have high specificity and only specific reactants will fit on their surfaces at the active site (B) Signup and view all the answers

Enzymes are not changed by the reaction they catalyze

True (A) Signup and view all the answers

Enzymes are the only type of catalysts in living cells

False (B) Signup and view all the answers

Enzymes bind to substrates at their inactive site

False (B) Signup and view all the answers

The resulting structure when the enzyme and substrate are bound is called a substrate-enzyme complex

False (B) Signup and view all the answers

Enzymes can bind to any type of substrate due to their low specificity

False (B) Signup and view all the answers

Match the following terms with their descriptions:

Enzymes = Protein catalysts that speed up chemical reactions Substrates = Small reactants that bind to enzymes at their active site Catalysts = Substances that speed up the rate of a chemical reaction without being consumed Enzyme-substrate complex = Resulting structure when the enzyme and substrate are bound Signup and view all the answers

Match the following statements with their correct descriptions:

Enzymes are very specific to which substrates they will bind to = High specificity- only specific reactants will fit on their surfaces at the active site Enzymes are not changed by the reaction they catalyze = When all the reactants have been converted to products, the original enzyme molecules remain Enzymes are proteins and they are the most common types of catalysts in living cells = Enzymes are large proteins that bind to small reactants Reactions catalyzed with enzymes are millions of times faster than non-catalyzed reactions = Enzymes are catalysts that speed up the rate of a chemical reaction Signup and view all the answers

Match the following stages of enzyme-catalyzed reactions with their descriptions:

Binding of substrates to an enzyme = Occurs at the active site of the enzyme Formation of an enzyme-substrate complex = Resulting structure when the enzyme and substrate are bound Formation of products = Results in a free enzyme and products Binding of substrates to an enzyme and so on = Part of the continuous cycle of enzyme-catalyzed reactions Signup and view all the answers

Match the following characteristics with their correct terms:

Heat and vigorous stirring = Options not available to cells for speeding up chemical reactions Specificity = Characteristic of enzymes where only specific reactants will fit on their surfaces at the active site Active site = Location in the enzymes where the chemical reaction will occur Catalysts = Substances that speed up the rate of a chemical reaction without being consumed or permanently affected Signup and view all the answers

Match the following features with their correct components:

Enzymes = Large proteins that bind to small reactants Substrates = Particular set of reactants for an enzyme Catalysts = Class of substances that speed up the rate of a chemical reaction without being consumed or permanently affected Enzyme-substrate complex = Resulting structure when the enzyme and substrate are bound Signup and view all the answers