AP Biology Exam Metabolism and Enzymes
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Metabolism - CORRECT ANSWER - the totality of an organisms chemical reactions that
result from interactions between molecules within the cell
metabolic pathway - CORRECT ANSWER - a sequence of chemical reactions undergone by a
compound in a living organism, start with substrate end with product
catabolic pathway - CORRECT ANSWER - breaking a complex molecule down into its
simpler parts, releasing energy. ie. cellular respiration
anabolic pathway - CORRECT ANSWER - using energy to build complex molecules from
simpler molecules. ie. protein synthesis
Bioenergetics - CORRECT ANSWER - the study of how organisms manage their energy
resources
energy - CORRECT ANSWER - capacity to cause change, do work
kinetic energy - CORRECT ANSWER - energy of motion
heat(thermal energy) - CORRECT ANSWER - kinetic energy associated with random
movement of molecules
potential energy - CORRECT ANSWER - energy of position
, chemical energy - CORRECT ANSWER - potential energy available for release in a chemical
reaction, energy within bonds
thermodynamics - CORRECT ANSWER - study of energy transformations
closed system - CORRECT ANSWER - isolated from surroundings, no energy transfer, cant
work at equilibrium bc its exhausted its ability to do work. free energy at a min
open system - CORRECT ANSWER - not isolated, energy and matter can be transferred
between system and surroundings, ie. cells
1st law of thermodynamics - CORRECT ANSWER - energy of the universe is constant,
cannot be created or destroyed, can only be transferred or transformed, conservation of energy
2nd law of thermodynamics - CORRECT ANSWER - during every energy transfer, some
energy is unusable and often lost, every energy transfer or transformation increases the total
entropy of the universe
entropy - CORRECT ANSWER - disorder, randomness
free energy - CORRECT ANSWER - delta G, energy that can do work when temperature and
pressure are constant, related to change in enthalpy(delta H), change in entropy(delta S) and
temperature in Kelvin(T). delta G = delta H - T delta S
exergonic reaction - CORRECT ANSWER - a reaction with a net release of free energy,
negative free energy, spontaneous
endergonic reaction - CORRECT ANSWER - a reaction that absorbs free energy from its
surroundings, non-spontaneous, positive free energy
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Metabolism - CORRECT ANSWER - the totality of an organisms chemical reactions that
result from interactions between molecules within the cell
metabolic pathway - CORRECT ANSWER - a sequence of chemical reactions undergone by a
compound in a living organism, start with substrate end with product
catabolic pathway - CORRECT ANSWER - breaking a complex molecule down into its
simpler parts, releasing energy. ie. cellular respiration
anabolic pathway - CORRECT ANSWER - using energy to build complex molecules from
simpler molecules. ie. protein synthesis
Bioenergetics - CORRECT ANSWER - the study of how organisms manage their energy
resources
energy - CORRECT ANSWER - capacity to cause change, do work
kinetic energy - CORRECT ANSWER - energy of motion
heat(thermal energy) - CORRECT ANSWER - kinetic energy associated with random
movement of molecules
potential energy - CORRECT ANSWER - energy of position
, chemical energy - CORRECT ANSWER - potential energy available for release in a chemical
reaction, energy within bonds
thermodynamics - CORRECT ANSWER - study of energy transformations
closed system - CORRECT ANSWER - isolated from surroundings, no energy transfer, cant
work at equilibrium bc its exhausted its ability to do work. free energy at a min
open system - CORRECT ANSWER - not isolated, energy and matter can be transferred
between system and surroundings, ie. cells
1st law of thermodynamics - CORRECT ANSWER - energy of the universe is constant,
cannot be created or destroyed, can only be transferred or transformed, conservation of energy
2nd law of thermodynamics - CORRECT ANSWER - during every energy transfer, some
energy is unusable and often lost, every energy transfer or transformation increases the total
entropy of the universe
entropy - CORRECT ANSWER - disorder, randomness
free energy - CORRECT ANSWER - delta G, energy that can do work when temperature and
pressure are constant, related to change in enthalpy(delta H), change in entropy(delta S) and
temperature in Kelvin(T). delta G = delta H - T delta S
exergonic reaction - CORRECT ANSWER - a reaction with a net release of free energy,
negative free energy, spontaneous
endergonic reaction - CORRECT ANSWER - a reaction that absorbs free energy from its
surroundings, non-spontaneous, positive free energy
