PrepTest 87, Section 2, Question 10
Researchers have found that most people's bodies make an enzyme, CYP2A6, that plays a crucial role in eliminating nicotine, the addictive drug in cigarettes, from the body. Smokers whose bodies make the most common form of this enzyme tend to smoke more than those whose bodies make some other form of it. Why? Well, the faster nicotine is eliminated from one's body, the sooner one will crave another cigarette, and _______.
Researchers have found that most people's bodies make an enzyme, CYP2A6, that plays a crucial role in eliminating nicotine, the addictive drug in cigarettes, from the body. Smokers whose bodies make the most common form of this enzyme tend to smoke more than those whose bodies make some other form of it. Why? Well, the faster nicotine is eliminated from one's body, the sooner one will crave another cigarette, and _______.
Researchers have found that most people's bodies make an enzyme, CYP2A6, that plays a crucial role in eliminating nicotine, the addictive drug in cigarettes, from the body. Smokers whose bodies make the most common form of this enzyme tend to smoke more than those whose bodies make some other form of it. Why? Well, the faster nicotine is eliminated from one's body, the sooner one will crave another cigarette, and _______.
Researchers have found that most people's bodies make an enzyme, CYP2A6, that plays a crucial role in eliminating nicotine, the addictive drug in cigarettes, from the body. Smokers whose bodies make the most common form of this enzyme tend to smoke more than those whose bodies make some other form of it. Why? Well, the faster nicotine is eliminated from one's body, the sooner one will crave another cigarette, and _______.
Which one of the following, if true, most effectively completes the explanation above?
the most common form of CYP2A6 is the one that most rapidly eliminates nicotine from the body
most people whose bodies make the rarest form of CYP2A6 do not smoke at all
if one's body does not make CYP2A6, nicotine will still be eliminated, although very slowly
the greater the quantity of CYP2A6 that one's body makes, the faster nicotine will be eliminated
helping to eliminate nicotine is not the only function that CYP2A6 serves
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