Question

ve the overall reaction ATP + glucose→glucose-6-phosphate + ADP + H. lf the &G" of ATP hydrolysis is /mol, what is AG for the coupled reaction? A. 46 kJ/mo B-18.4 kJ/mol C. -32.2 kJ/mol D. 18.4kJ/mol 26. Which of the following is true about oxidation-reduction reactions? A. B. C. D. During oxidation a compound gains electrons. Every oxidation must be accompanied by a reduction Dehydrogenases typically remove two electrons and two hydrides (H). There are four commonly accessed oxidation states of carbon. 27-All are characteristics of anabolism EXCEPT: A. Assembly of complex molecules B. Formation of new covalent bonds C. ATP provides energy D. NADH is an electron donor E. All are characteristics of anabolism 28. Which of the following molecules could align side-by-side to form a lipid bilayer? A. B. C. D. E. Glycerophospholipids sphingomyelins (sphingolipids) Fatty acid Cholesterol molecules Both A and B 29. Which of the following statement is not true about the propagation of a nerve impulse? A The influx of sodium ions makes the membrane potential more positive. B. The action potential triggers the opening of voltage-gated potassium channels C. The action potential can only travel in one direction along the axon. D. The action potential can only travel in one direction along the axon. 30. Consider the reaction of pyruvate with NADH and the standard reduction potentials, E, of pyruvate and NAD. lactate + NAD. Redox pair E v -0.19 0.32 NADINADH Based on the standard reduction potentials above, select the redox pair that has the greater tendency to lose electrons A. The NAD' /NADH pair has the greater tendency to lose electrons because the NAD /NADH E" value is the most positive. 8. The NAD' /NADH pair has the greater tendency to lose electrons because the NAD /NADH E* value is the most positive. C. The pyruvate/actate pair has the greater tendency to lose electrons because the pyruvate/lactate E value is the most negative. value is the most positive

Answer 1

25.
Option A is correct.
dG for the conversion of glc to glc-6-P coupled with ATP hydrolysis is approximately -16 kJ/mol

26.
Oxidation:
Loss of electrons
Increase in oxidation number
Gain of oxygen

Reduction:
Gain of electrons
Decrease in oxidation number
Loss of oxygen

Option B is correct.
Every oxidation reaction is coupled with a reduction reaction.

27.
Option D correct.
ATP provides energy for anabolic reactions.

28.
Option E is correct.
Glycerophospholipids and sphingolipids can align side by side in the membrane.