46. Enzymes are typically: A) highly specific, B) most active at 0°C C) most act

Question

46. Enzymes are typically: A) highly specific, B) most active at 0°C C) most active at 65°C. D) multipurpose-one enzyme catalyzes multiple pathways E) polysaccharides. 47. Metal ions bound to enzymes are called: A) cofactors. B) coenzymes. C) vitamins. D) metalloids. E) anions. 48. In a reaction, enzymes change the: A) AG B) first law of thermodynamics. C) second law of thermodynamics. D) types of products. E) activation energy 49. The energy of activation of a reaction is: A) the net change in free energy B) the difference in energy between substrate and product. C) the energy input needed to reach the transition state. D) the difference in energy between the transition state and the product. E) equivalent to the AG of ATP hydrolysis. You notice that a chemical reaction in your system is happening at a slow rate. You want to speed up the reaction. What do you do? A) add more products B) change the ?@for the reaction C) add an enzyme that catalyzes the reaction D) increase the activation energy 50. 51. What is the function of an enzyme? A) to increase the rate of a specific reaction B) to decrease amount of energy needed to reach the transition state C) to alter the equilibrium of a specific reaction D) to both increase the rate of a specific reaction and decrease the amount of energy needed to reach the transition state

Explanation / Answer

46.a.highly specific

Since enzymes have specific substrates hence they are specific in reactions they catalyze

47.a.cofactors

Cofactors, mostly metal ions or coenzymes, are inorganic and organic chemicals that assist enzymes during the catalysis of reactions.

48.E.activation energy

Thus enzymes speed up reactions by lowering activation energy.

49.c.the energy input needed to reach the transition state

50.c.add an enzyme that catalyzes the reaction

Thus enzymes speed up reactions by lowering activation energy.

51.D.both increase the rate of specific reaction and decrease the amount of energy needed to reach the transition state.

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