Self-study
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. ███████ █████ ██████ ████ ███ ████ ██████ ████ ██ ████ ██████ ████ ██ █████ ████ ████ █████ █████ ██████ ████ ████ █████ ████ ██ ███ ████ █████ ███ ██████ ████████ ██ ██████████ ████ █████ █████ ███ ██████ ███ ████ █████ ███████ ██████████ ███ ████████
Summary
Most people produce the enzyme CYP2A6, which plays eliminates nicotine from the body. Nicotine is the addictive drug in cigarettes. Smokers with the most common form of this enzyme tend to smoke more than smokers with other forms of the enzyme. Why? Because the faster nicotine is eliminated from the body, the faster a person will crave another cigarette.
Strongly Supported Conclusions
The most common form of the enzyme eliminates nicotine from the body the fastest.
10.
Which one of the following, ██ █████ ████ ███████████ █████████ ███ ███████████ ██████
a
the most common ████ ██ ██████ ██ ███ ███ ████ ████ ███████ ██████████ ████████ ████ ███ ████
This answer is strongly supported. We know that smokers with the most common form of the enzyme smoke more due to nicotine being eliminated from the body faster. We can infer that the most common form of the enzyme must cause the fastest elimination of nicotine.
b
most people whose ██████ ████ ███ ██████ ████ ██ ██████ ██ ███ █████ ██ ███
This answer is unsupported. We don’t know what happens in people with the rarest form of the enzyme. We also have no idea how common smoking is based on the enzyme, the stimulus only discusses the enzyme's effects for people who are already smokers.
c
if one's body ████ ███ ████ ███████ ████████ ████ █████ ██ ███████████ ████████ ████ ██████
This answer is unsupported. We don’t know what occurs in people whose bodies do not produce the enzyme.
d
the greater the ████████ ██ ██████ ████ █████ ████ ██████ ███ ██████ ████████ ████ ██ ██████████
This answer is unsupported. We don’t know if there’s any relationship between the quantity of the enzyme and nicotine being eliminated from the body.
e
helping to eliminate ████████ ██ ███ ███ ████ ████████ ████ ██████ ██████
This answer is unsupported. We don’t know if there are any other functions the enzyme serves.