Exercise Physiology 4

Question 1

by definition, an endergonic reaction is

a. a chemical reaction that requires energy to be added to the reactants ebfore the reaaction will take place
b. a chemical reaction that gives off energy
c. an enzyme-catalyzed reaction
d. a chemical reaction that results in products containing less free energy than the original reactants

Answer 1

a chemcial reaction that requires energy to be added to the reactants before the reaction will take place

Question 2

coupled reactions are defined as

a. reactions that are linked together via the same enzyme
b. reactions that are linked together, with the liberation of free energy in one reaction being used to drive the second reaction
c. reactions that are not directly linked together but are related to the same enzyme
d. reactions that are linked via common substrates

Answer 2

reactions that are linked together, with the liberation of free energy in one reaction being used to drink the second reaction

Question 3

enzymes are catalysts that increase the rate of reactions by

a. pulling two substrates together
b. lowering the energy of activiation
c. binding to a substrate & producing energy
d. binding to a substrate & releasing protons

Answer 3

lower the energy of activation

Question 4

stored polysaccharides in muscle & other tissues in animals are called

a. glucose
b. fructose
c. glycogen
d. cellulose

Answer 4

glycogen

Question 5

neutral fats that are stored in muscle & other tissues & play an important role as an energy substrate are

a. phospholipids
b. cholesterol
c. triglycerides
d. lipoproteins

Answer 5

triglycerides

Question 6

the enzyme-substrate complex is

a. best described by the lock & key model
b. not influenced by pH
c. a terminal point for both the enzyme & substrate (neither can be reused)
d. more likely to occur in a 20 degrees C environment than a 40 degrees C one

Answer 6

best described by the lock & key model