Which of the Following Are Examples of Pyrimidines

question 3

Multiple Choice

Which of the following are examples of pyrimidines?

• A) uracil and adenine
• B) cytosine and guanine
• C) thymine and adenine
• D) thymine and guanine
• E) cytosine and thymine

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Definitions:

Tropylium Ion

A positively charged ion (cyclic cation) with the formula C7H7+, known for its aromatic stability.

Planar Molecule

A planar molecule is a molecule in which all atoms reside in the same geometric plane, often associated with molecules containing double bonds that lead to a flat molecular geometry.

Nonaromatic

Refers to compounds that do not possess a ring structure with alternating single and double bonds, lacking the characteristic stability of aromatic systems.

Nonaromatic

Refers to organic compounds that do not exhibit the stability associated with aromatic rings, often lacking delocalized pi-electron systems.