24.A reaction has a deltaG of 5.6kcal/mol. Which of the following would most likely betrue?

A. The reaction would result in products with a greaterfree-energy than in the reactants.

B. The reaction could be coupled to and thus powered by anotherreaction with a deltaG of -1.0 kcal/mol.

C. The reaction would release free energy.

D. The reaction is spontaneous.

E. The reaction is exergonic.

26. If we follow the oxidation of just one molecule ofglucose, how many net ATP have been formed up to the end of thecitric acid cycle?

A. 3

B. 2

C. 4

D. 5

E. 8

31.The Na+/K+ pump consummes a considerable amount ofthe total ATP produced by the cell (~30% for most cells and up to70% in neurons), so this pump is critical for cellular function.Which of the following is true?

A. This pump contributes to a positive interior charge and thusresets the resting membrane potential of a neuron.

B. This pump is an example of passive transport.

C. This pump is a channel protein.

D. In the animal gut, the Na+ gradient generated by this pump isused to actively move glucose into the cell via coupledtransport.

E. This pump hydrolyzes two ATP for each cycle through itsconformations to move three Na+ ions and two K+ ions.

33. Which of the following is false regarding thestructure of aquaporin?

A. The pore of this channel is selective and only allows waterto cross the membrane.

B. The transmembrane portions of this channel that interact withthe nonpolar tails of phospholipids are expected to be mostlyhydrophobic amino acids.

C. This is an integral membrane protein that provides a porethrough the membrane.

D. The pore of this channel is expected to be lined withhydrophobic amino acids.

34. Which of the following statements is a correct distinctionbetween autotrophs and heterotrophs?

A. Only heterotrophs require oxygen.

B. Only autotrophs have mitochondria.

C. Heterotrophs can nourish themselves beginning with CO2 andother nutrients that are inorganic.

D. Autotrophs are the ultimate source of organic compounds forheterotrophs.

E. Cellular respiration is unique to heterotrophs.

34.The Calvin cycle could not occur without the lightreactions. Which of the following statements describes why this isthe case?

A. ADP and NADH produced in the light reactions provide theenergy for the production of sugars in the Calvin cycle.

B. ATP and NADPH produced in the light reactions provide theenergy for the production of sugars in the Calvin cycle.

C. ADP and NADP+ produced in the light reactions provide theenergy for the production of sugars in the Calvin cycle.

D. Molecular oxygen produced in the light reactions provides theenergy for the production of sugars in the Calvin cycle.

E. Photons of light directly activate the enzymes of the CalvinCycle.

37. The oxygen consumed during cellular respiration isconverted to.....
A. NAD+

B. water

C. the organic fuel (ie, glucose)

D. carbon dioxide

E. ATP