ch 7, 8 and 9 31 of 51 Activity: Chemical Reactions and ATP Click here to complete this activity. Then answer the questions. Part A In this reaction _____. ANSWER: the products have less potential energy than the reactants entropy has decreased the products have been rearranged to form reactants AC is a reactant CD is a product Part B In this reaction _____. ANSWER: 6/13/2019, 11:24 AM ch 7, 8 and 9 32 of 51 the chemical energy of the products is greater than that of the reactants heat has been released to the environment entropy has decreased disorder has decreased the kinetic energy of the reactants is less than that of the products Part C The following reaction A --> B + C + heat is a(n) _____ reaction. ANSWER: endergonic exchange dehydration synthesis anabolic exergonic Part D A(n) _____ reaction occurs spontaneously. ANSWER: exergonic chemical endergonic anabolic kinetic Part E Which of these reactions requires a net input of energy from its surroundings? ANSWER: 6/13/2019, 11:24 AM ch 7, 8 and 9 33 of 51 catabolic ATP --> ADP + P hydrolysis endergonic exergonic Part F In cells, what is usually the immediate source of energy for an endergonic reaction? ANSWER: ADP sugar as spontaneous reactions, endergonic reactions do not need an addition of energy glucose ATP Part G The reaction ADP + P --> ATP is a(n) _____ reaction. ANSWER: spontaneous hydrolysis chemical endergonic exergonic Part H The energy for an endergonic reaction comes from a(n) _____ reaction. ANSWER: 6/13/2019, 11:24 AM ch 7, 8 and 9 34 of 51 exergonic ADP + P --> ATP synthesis glucose + glucose --> maltose anabolic Part I What is the fate of the phosphate group that is removed when ATP is converted to ADP? ANSWER: It is acquired by a reactant in an exergonic reaction. It is acquired by a reactant in an endergonic reaction. It is broken down into one phosphorus and four oxygen atoms. It is acquired by a reactant in a spontaneous reaction. It is used to convert an ATP into an AQP. Part J This graph illustrates a(n) _____ reaction. ANSWER: catabolic hydrolysis endergonic exergonic spontaneous 6/13/2019, 11:24 AM ch 7, 8 and 9 35 of 51 Part K Select the INCORRECT association. ANSWER: enzyme ... protein exergonic ... spontaneous kinetic energy ... motion exergonic ... uphill potential energy ... positional energy Part L What is energy coupling? ANSWER: a barrier to the initiation of a reaction the hydrolysis of ATP to ADP + P the use of an enzyme to reduce EA a description of the energetic relationship between the reactants and products in an exergonic reaction the use of energy released from an exergonic reaction to drive an endergonic reaction . 6/13/2019, 11:24 AM