Which of the following is a g-hydroxy-a-amino acid?
A) asparagine
B) serine
C) threonine
D) none of these
D
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The Pamir Knot
A) is located in Turkmenistan. B) refers to the political isolation experienced by Azerbaijan on the western side of the Caspian Sea. C) is the term for the border between Mongolia and China. D) is a complex tangle of east-west and north-south trending mountain ranges on the borders of Afghanistan, Tajikistan, Pakistan, and China. E) refers to the mountainous region lying on the border between Nepal and China.
Black lung disease results from
A. Careless strip-mining methods B. The radioactivity around coal-fired power plants C. Coal dust literally filling lungs like dust in a vacuum cleaner bag D. The radioactivity in coal E. Coal dust causing inflammation and fibrosis in lungs
The Big Bang occurred roughly ________ years ago.
A. 10 billion B. 250 million C. 13 billion D. 4.6 billion E. 750 million
Use of microorganisms to break down toxic organic compounds in ground water is called
A. aerobic decay. B. bioremediation. C. eutrophication. D. anaerobic decay.