BioChemistry > EXAM > Solved Questions for Midterm Exam 2 - Introduction to Biochemistry | BIOC 405 |SOLVED EXAM FOR A GRA (All)

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Solved Questions for Midterm Exam 2 - Introduction to Biochemistry | BIOC 405 |SOLVED EXAM FOR A GRADES

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Question #1: Which one of the following properties does NOT contribute to the high energy of ATP (choices A - D) or do all listed properties contribute (choice E)? A. Charge repulsion between phosp... hates. B. Resonance stabilization of phosphate. C. Magnesium binding to phosphate ions. D. Ionization of ADP. E. Properties listed in A through D all contribute to the high energy of ATP. Question #2: If the reaction glucose + ATP glucose-6-phosphate + ADP is 99% complete at equilibrium (ΔG = 0), then what is the standard ΔG°'? Assume 2.3RT = 5kJ/mol A. +10 kJ/mol B. 1 kJ/mol C. -5 kJ/mol D. -10 kJ/mol E. 0 kJ/mol Question #3: In glycolysis, fructose 1,6-bisphosphate is converted to two products with a standard free energy change (ΔG°') of 23.8 kJ/mol. Under what conditions (encountered in a normal cell) will the free-energy change (ΔG) be negative, enabling the reaction to proceed to the right? A. When there is a high concentration of products relative to the concentration of fructose 1,6-bisphosphate. B. Under standard conditions, enough energy is released to drive the reaction to the right. C. When there is a high concentration of fructose 1,6-bisphosphate relative to the concentration of products. D. None of the other options. E. The reaction will not go to the right spontaneously under any conditions because ΔG°' is positive. Question #4: Which enzyme uses inorganic phosphate as a substrate? A. hexokinase B. phosphofructokinase C. glyceraldehyde-3-phosphate dehydrogenase D. pyruvate kinase E. enolase Question #5: Which molecular component is NOT part of ATP, FAD, NAD+ and CoA (choice A - D) or are all components common to these molecules (choice E)? A. ribose B. phosphate C. adenine D. nicotinamide E. Choices A, B, C and D are all common to ATP, FAD, NAD+ and Co [Show More]

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