AP Bio Unit 2 – Enzymes Exam
Questions and Answers
Enzyme - Correct Answers -protein catalyst that speeds up the rate of specific biological
reactions
Active Site - Correct Answers -Region of an enzyme into which a particular substrate
fits.
Substrate - Correct Answers -A specific reactant acted upon by an enzyme
Enzyme-substrate complex - Correct Answers -Transition state occurs here -
make/break bonds. when the substrate and the enzyme interact.
substrate alignment, induce charge, stress bond - Correct Answers -How do enzymes
reduce activation energy?
Induced fit - Correct Answers -Enzyme morphing around substrate like a baseball glove
around a ball.
Feedback Inhibition (of a metabolic pathway) - Correct Answers -metabolic pathway
creates product that inhibits original enzyme from starting the metabolic pathway again.
Inhibitor - Correct Answers -Is ATP an activator or inhibitor of PFK?
activator - Correct Answers -Is ADP an activator or an inhibitor of PFK?
inhibitor - Correct Answers -Is citrate and activator or an inhibitor of PFK?
Competitive Inhibitor - Correct Answers -binds to the active site, prevents substrate from
binding and forming E-S complexes. MIMICS SUBSTRATE. reversible.
Non-competitive Inhibitor - Correct Answers -binds to the enzyme at a site other than
active site and keeps enzyme from working. CAUSES SHAPE CHANGE. reversible.
allosteric enzyme - Correct Answers -enzyme oscillates between functional and non-
functional.
Questions and Answers
Enzyme - Correct Answers -protein catalyst that speeds up the rate of specific biological
reactions
Active Site - Correct Answers -Region of an enzyme into which a particular substrate
fits.
Substrate - Correct Answers -A specific reactant acted upon by an enzyme
Enzyme-substrate complex - Correct Answers -Transition state occurs here -
make/break bonds. when the substrate and the enzyme interact.
substrate alignment, induce charge, stress bond - Correct Answers -How do enzymes
reduce activation energy?
Induced fit - Correct Answers -Enzyme morphing around substrate like a baseball glove
around a ball.
Feedback Inhibition (of a metabolic pathway) - Correct Answers -metabolic pathway
creates product that inhibits original enzyme from starting the metabolic pathway again.
Inhibitor - Correct Answers -Is ATP an activator or inhibitor of PFK?
activator - Correct Answers -Is ADP an activator or an inhibitor of PFK?
inhibitor - Correct Answers -Is citrate and activator or an inhibitor of PFK?
Competitive Inhibitor - Correct Answers -binds to the active site, prevents substrate from
binding and forming E-S complexes. MIMICS SUBSTRATE. reversible.
Non-competitive Inhibitor - Correct Answers -binds to the enzyme at a site other than
active site and keeps enzyme from working. CAUSES SHAPE CHANGE. reversible.
allosteric enzyme - Correct Answers -enzyme oscillates between functional and non-
functional.
