Examlex
Which of the following are purine nitrogenous bases?
Methane
A greenhouse gas consisting of one carbon atom and four hydrogen atoms, CH4, contributing to global warming.
Methanol
A simple alcohol with the formula CH3OH, known for its use as a solvent, antifreeze, fuel, and as a precursor to other chemicals.
Carbon
A chemical element with symbol C and atomic number 6, essential to all known life and the basis for organic chemistry.
Hydrogens
A chemical element with the symbol H and atomic number 1, known as the lightest element in the periodic table.
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