1) The main reason that ATP is considered the energy currency in cells is because it contains an adenine base. contains accessible energy in phosphate bonds. carries a positive charge. contains a sugar ring. 5) In feedback inhibition of a metabolic pathway, where does the inhibitor bind? to the substrate of the first reaction to the product of the first reaction to the enzyme of the first reaction to a substrate or the product of the last reaction 6) Which of the following can act a an enzyme cofactor? iron vitamines NAD+ All of the above. 8) Which statement most accurately describes the second law of thermodynamics? Energy cannot be created nor destroyed but it can be changed from one form to another. One usable form of energy can be completely converted into another usable form. Energy cannot be created or destroyed. Energy cannot be changed from one form to another without a loss of usable energy. 9) This is a multiple answer question. Choose all that are correct. Choosing incorrect questions will subtract from the grade on this question. However, you cannot receive an negative grade on the question. In which of the following ways is the enzyme inhibitor warfarin used? rat poison recreational drug anticoagulant medicine cancer drug 10) Which of the following statements is not true concerning enzymatic activity? Enzyme activity increases as substrate concentration increases until the maximum rate is achieved. Each enzyme has a preferred pH at which the enzyme reaction rate is highest. As the temperature increases, most enzymatic reactions will still proceed at the same rate. Above a certain temperature, an enzyme will become denatured. 11) Each enzyme has a particular substrate because enzymes are named for their substrate. have active sites complementary in shape to their substrates. decrease the productivity of the cell. increase the energy of activation. 13) Which of the following statements is true about enzymes? They are unaffected by changes in pH. They catalyze only one specific type of reaction. Boiling temperatures do not affect their activity. They can associate with a wide variety of substrates. Their 3D shape can vary and still be active.