AP BIOLOGY - UNIT 3 PART 1 EXAM
QUESTIONS AND ANSWERS
potential energy - ANSWER-Stored energy.
free energy - ANSWER-Measures the portion of a system's energy that can perform
work when temperature and pressure are uniform throughout the system, as in a
living cell.
endergonic reaction - ANSWER-Reaction that absorbs free energy from its
surroundings.
exergonic reaction - ANSWER-Reaction that proceeds with a net release of free
energy.
catalyst - ANSWER-A chemical agent that speeds up a reaction without being
consumed by the reaction.
enzyme - ANSWER-Protein that speeds up reactions. Typically end in "ase" (ex.
Peroxidase, Lipase)
activation energy - ANSWER-The amount of energy needed to push the reactants
over an energy barrier.
enzyme-substrate complex - ANSWER-When an enzyme binds to its substrate, it
forms:
active site - ANSWER-A pocket or groove on the surface of the enzyme where a
substrate can bind.
induced fit model - ANSWER-States that the enzyme and substrate undergo
conformational changes to interact fully with one another (as opposed to "Lock &
Key"
competitive inhibitors - ANSWER-Reduce the productivity of enzymes by blocking
substrates from entering active sites.
noncompetitive inhibitors - ANSWER-Impede enzymatic reactions by binding to
another part of the enzyme (other than the active site).
exothermic reaction - ANSWER-a chemical reaction where energy is given off, so
that the products have less energy than the reactants.
endothermic reaction - ANSWER-a chemical reaction where energy is taken in, so
that the products have more energy than the reactants.
Catabolic pathway - ANSWER-Release energy by breaking down complex
molecules into simpler ones i.e. Cellular respiration
QUESTIONS AND ANSWERS
potential energy - ANSWER-Stored energy.
free energy - ANSWER-Measures the portion of a system's energy that can perform
work when temperature and pressure are uniform throughout the system, as in a
living cell.
endergonic reaction - ANSWER-Reaction that absorbs free energy from its
surroundings.
exergonic reaction - ANSWER-Reaction that proceeds with a net release of free
energy.
catalyst - ANSWER-A chemical agent that speeds up a reaction without being
consumed by the reaction.
enzyme - ANSWER-Protein that speeds up reactions. Typically end in "ase" (ex.
Peroxidase, Lipase)
activation energy - ANSWER-The amount of energy needed to push the reactants
over an energy barrier.
enzyme-substrate complex - ANSWER-When an enzyme binds to its substrate, it
forms:
active site - ANSWER-A pocket or groove on the surface of the enzyme where a
substrate can bind.
induced fit model - ANSWER-States that the enzyme and substrate undergo
conformational changes to interact fully with one another (as opposed to "Lock &
Key"
competitive inhibitors - ANSWER-Reduce the productivity of enzymes by blocking
substrates from entering active sites.
noncompetitive inhibitors - ANSWER-Impede enzymatic reactions by binding to
another part of the enzyme (other than the active site).
exothermic reaction - ANSWER-a chemical reaction where energy is given off, so
that the products have less energy than the reactants.
endothermic reaction - ANSWER-a chemical reaction where energy is taken in, so
that the products have more energy than the reactants.
Catabolic pathway - ANSWER-Release energy by breaking down complex
molecules into simpler ones i.e. Cellular respiration
