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Suppose the concentration of glucose inside a cell is 0.1 mM and the cell is suspended in a glucose solution of 0.01 mM.

What would be the free energy change involved in transporting 10?6 mole of glucose from the medium into the cell? Assume T= 37 ?C. ANSWER: 5.93�10?6 kJ
What would be the free energy change involved in transporting 10?6 mole of glucose from the medium into the cell if the intracellular and extracellular concentrations were 1 mM and 10 mM, respectively? ANSWER:-5.93x10^-6 kJ
If the processes described in parts A and B were coupled to ATP hydrolysis, how many moles of ATP would have to be hydrolyzed in order to make each process favorable? (Use the standard free energy change for ATP hydrolysis.)
*I believe you need the answers from the previous two questions (posted above) to solve this, but I don't know how to use them. Any explanation would be appreciated!

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2 answers
  1. Which statements about hydrogen bonds are correct?

    1) Hydrogen bonds are the interaction between a hydrogen atom bonded to an electronegative element and the lone pair of electrons on a nearby electronegative atom.
    2) The atom to which the hydrogen atom is covalently bonded is the hydrogen-bond donor.
    3) The distance between the covalently bound H atom and its hydrogen-bonding donor is the sum of its van der Waals radii.
    4) Hydrogen bonds can be stronger interactions than even charge-charge interactions.
    Which statements about hydrogen bonds are correct?

    1) Hydrogen bonds are the interaction between a hydrogen atom bonded to an electronegative element and the lone pair of electrons on a nearby electronegative atom.
    2) The atom to which the hydrogen atom is covalently bonded is the hydrogen-bond donor.
    3) The distance between the covalently bound H atom and its hydrogen-bonding donor is the sum of its van der Waals radii.
    4) Hydrogen bonds can be stronger interactions than even charge-charge interactions.
    2, 3, and 4 are correct.
    1, 2, and 3 are correct.
    1, 2, and 4 are correct.
    All of the listed statements are correct.

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  2. 2. What is the role of ATP in the cell? (1 point)
    Transporting energy within the cell
    Absorbing water during photosynthesis
    Transporting oxygen for respiration
    Absorbing light energy for photosynthesis
    3. What happens during photosynthesis? (1 point)
    Heterotrophs consume ATP.
    Heterotrophs produce ATP.
    Autotrophs consume organic molecules.
    Autotrophs produce organic molecules.
    4. How are photosynthesis and cellular respiration related? (1 point)
    Cellular respiration cannot occur without photosynthesis.
    They each occur in completely different organisms.
    Both depend on ATP as a source of energy.
    Both produce more ATP than they use.

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