AP Biology Enzymes Quiz

What is the primary role of enzymes in biological systems?

• To catalyze chemical reactions

• To store genetic information

• To transport oxygen

• To act as structural components

Which of the following is NOT a function of enzymes?

• Speeding up chemical reactions

• Changing the shape of substrates

• Digestion of molecules

• Synthesis of molecules

What determines the function of an enzyme?

• Its temperature

• Its color

• Its shape

• Its size

In enzyme-catalyzed reactions, what is the term used for the reactant?

• Catalyst

• Substrate

• Product

• Inhibitor

What is the term for the model that describes enzyme specificity as a lock and key?

• Substrate model

• Active site model

• Lock and key model

• Induced fit model

What happens to an enzyme's active site during the induced fit model?

• It becomes inactive

• It changes shape to better fit the substrate

• It breaks down

• It releases energy

Which level of protein structure is determined by the sequence of amino acids?

• Primary structure

• Secondary structure

• Tertiary structure

• Quaternary structure

What type of bond is formed between cysteine residues in proteins?

• Ionic bond

• Hydrogen bond

• Disulfide bridge

• Peptide bond

Which of the following interactions is NOT involved in tertiary protein structure?

• Hydrophobic interactions

• Ionic bonds

• Covalent bonds

• Van der Waals forces

What must be compatible for a substrate to fit into an enzyme's active site?

• Size and color

• Shape and charge

• Weight and density

• Temperature and pH