Hydrogen bonds can form between guanine and ____, and between adenine and ____.

A) phosphate; sugar
B) thymine; cytosine
C) cytosine; thymine
D) sugar; phosphate
E) adenine; guanine

Hydrogen Bonds

An electrostatically driven, fragile linkage occurs between two molecules when a proton from one molecule attracts an electronegative atom in another.

Guanine

One of the four main nucleobases found in the nucleic acids DNA and RNA, which pairs with cytosine.

Adenine

A nitrogenous purine base that is a component of nucleic acids and ATP.