KINES 314 EXAM 1 QUESTIONS AND
ANSWERS
Exergonic - Correct Answers -Decrease in free energy --> Release of energy in a
system. -change in G. Spontaneous
Endergonic - Correct Answers -Pump energy into a system to form ATP. Formation of
energy in a system. +change in G
Why don't ATP of carbs breakdown immediately if exergonic reactions are
spontaneous? - Correct Answers -1. Activation energy must be overcome
2. *Enzymes lower activation energy*
Enzymes - Correct Answers -Allow the body to control when ATP and fuels react.
Regulating enzyme activity --> regulating energy
Creatine Kinase - Correct Answers -Rate limiting enzyme for the Phosphocreatine
system
Stimulated by ADP
Inhibited by ATP
Phosphofructokinase (PFK) - Correct Answers -Rate limiting enzyme for Glycolysis
Stimulated by ADP, AMP, Pi, PH levels increasing
Inhibited by ATP, Creatine Phosphate, PH levels decreasing
Isocitrate dehydrogenase - Correct Answers -Rate limiting enzyme for Krebbs cycle
Stimulated by ADP, Ca++, NAD+
Inhibited by ATP, NADH
Cytochrome c oxidase - Correct Answers -Rate limiting enzyme for Electron transport
chain
Stimulated by ADP, Pi
Inhibited by ATP
Bioenergetics - Correct Answers -Pairing of Endergonic and Exergonic reactions to
provide energy required to force endergonic reactions (Muscle contraction)
Phosphocreatine System - Correct Answers -Immediate source of ATP.
High rate, low capacity
ANSWERS
Exergonic - Correct Answers -Decrease in free energy --> Release of energy in a
system. -change in G. Spontaneous
Endergonic - Correct Answers -Pump energy into a system to form ATP. Formation of
energy in a system. +change in G
Why don't ATP of carbs breakdown immediately if exergonic reactions are
spontaneous? - Correct Answers -1. Activation energy must be overcome
2. *Enzymes lower activation energy*
Enzymes - Correct Answers -Allow the body to control when ATP and fuels react.
Regulating enzyme activity --> regulating energy
Creatine Kinase - Correct Answers -Rate limiting enzyme for the Phosphocreatine
system
Stimulated by ADP
Inhibited by ATP
Phosphofructokinase (PFK) - Correct Answers -Rate limiting enzyme for Glycolysis
Stimulated by ADP, AMP, Pi, PH levels increasing
Inhibited by ATP, Creatine Phosphate, PH levels decreasing
Isocitrate dehydrogenase - Correct Answers -Rate limiting enzyme for Krebbs cycle
Stimulated by ADP, Ca++, NAD+
Inhibited by ATP, NADH
Cytochrome c oxidase - Correct Answers -Rate limiting enzyme for Electron transport
chain
Stimulated by ADP, Pi
Inhibited by ATP
Bioenergetics - Correct Answers -Pairing of Endergonic and Exergonic reactions to
provide energy required to force endergonic reactions (Muscle contraction)
Phosphocreatine System - Correct Answers -Immediate source of ATP.
High rate, low capacity
