HSC 308 Exam 1 Questions and Answers – Updated 2024

HSC 308 Exam 1 Questions and Answers – Updated 2024 Where does glycolysis occur in the skeletal muscle cells? Mitochondria Sarcoplasmic Reticulum Cytosol Golgi Apparatus - Answer-Cytosol Which of the following represents the adenylate kinase ATP ----- ADP + P PCr ----- Cr + P ADP + ADP ------ ATP + AMP ADP + P ----- ATP - Answer-ADP + ADP --------ATP + AMP Chemical energy stored in the phosphate bonds of ATP is converted into what two forms of energy during muscle contraction? EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024 Page 2/22 Mechanical and thermal(heat) Mechanical and chemical Chemical and thermal(heat) Mechanical and electric - Answer-Mechanical and thermal (heat) Which of the following undergo(es) gluconeogenesis in the Cori Cycle? Alanine Glycerol Fatty acids Lactate - Answer-Lactate How many gross ATPs are produced in glycolysis for one molecule of glucose to glycogen? 1 2 3 4 - Answer-4 EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024 Page 3/22 How many net ATPs are generated from the breakdown of one molecule of glucose in anaerobic glycolysis? 1 2 3 4 - Answer-2 In a fast twitch (type II) muscle fiber how many net ATPs are generated from the complete breakdown of one molecule of glycogen in the aerobic system? 33 32 31 30 - Answer-31 The breakdown of glucose in glycolysis results in a one ATP difference in net ATP production compared to the breakdown of glycogen. Which of the following statements explains this difference? - Answer-Glucose has to pay one more ATP at the start of of glycolysis and so even though its gross ATP production is the same as glycogen its net ATP production is one ATP less EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024 Page 4/22 Which of the following enzymes catalyze the hydrolysis of PCr Creatine Kinase Lactate dehydrogenase Adenylate kinase Phosphofructokinase - Answer-Creatine Kinase Increasing the amount of substrate (PCr) and the enzyme concentration in the previous question would have what impact on the rate of the reaction? Decreased rate no change Increased Rate - Answer-Increased rate When fatty acids are metabolized which of the following are generated for each turn of the beta oxidation cycle? one NADH + H+ one FADH2 one Acetyl-CoA EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024 Page 5/22 all of the above - Answer-One NADH+, one H+, one FADH2 and one acetyl-CoA Which of the following statements would NOT be true for trained vs. untrained individuals? Oxygen deficit is less for trained individuals VO2max is greater for trained individuals Blood lactate threshold occurs at a lower percentage of VO2 max for trained individuals All are true - Answer-Blood lactate threshold occurs at a lower percentage of VO2 max for trained individuals The energy released from the breakdown of P