MBMB 451b

Carbohydrate Metabolism Quiz

1. Hydrolysis of ATP to yield energy usable for maintenance of life most often involves the breaking of which bond in the above structure?

   a

   b

   c

   d

   e

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2. The adenine ring in ATP is indicated in the above drawing by:

   e

   f

   g

   h

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3. Glycolysis is which of the following?

   a catabolic process

   an anabolic process

   an anaplerotic process

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   Glucose + ATP Æ G-6-P + ADP
4. For the reaction given above DG^o' = -4 Kcal mol^-1. This implies that the preferred direction of the reaction is:

   to the right.

   to the left.

   the reaction is at equilibrium as written.

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5. Organic reduction normally involves:

   an increase in energy.

   a decrease in energy.

   no change in energy.

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6. For a reaction with a very large DG^o', e.g., +15 Kcal mol^-1, the velocity of the reaction is very large.

   True

   False

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7. The reaction above (not balanced) represents which of the following?

   a hydrolysis

   a reduction

   an oxidation

   nonsense

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8. Which of the following are "high energy" compounds important in bioenergetics and the transferal of energy.
   1. ATP
   2. NADH + H⁺
   3. NADPH + H⁺
   4. creatine

   1

   1, 2

   1, 2, 3

   1, 2, 3, 4

   1, 2, 4

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9. Enzymes are important because they:
   1. direct the flow of energy in certain paths.
   2. increase the velocity of a reaction.
   3. may be regulated.
   4. decrease the relative energies of the reactants and products.
   5. are composed of protein.

   1

   1, 2

   1, 2, 3

   2, 3, 4

   3, 4, 5

   1, 3, 5

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10. Which of the following determines the amount of work required to synthesize ATP in a living cell, and therefore the amount of work obtainable from ATP for processes such as muscle contraction.

    DG'

    DG^o'

    K

    DS

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