Usually cytosine although other combinations, infrequently seen, are possible.
Guanine-cytosine forms three hydrogen bonds, while adenine-thymine forms two hydrogen bonds. Therefore, guanine-cytosine forms more hydrogen bonds.
Cytosine (C) and Guanine (G) pair, as do Adenine (A) and Thymine (T).
The guanine-cytosine base pair is harder to break than the adenine-thymine base pair due to the presence of three hydrogen bonds between guanine and cytosine, compared to two hydrogen bonds between adenine and thymine. This makes the guanine-cytosine pair more stable and stronger.
Guanine
Cytosine binds [bonds] with Guanine.
Cytosine, a pyrimidine (sugar) base, pairs with Guanine, a purine (nitrogen) base.
What does guanine connect to in a dna molecule?
Guanine
Thymine and guanine cannot pair because they do not form complementary base pairs in DNA. In DNA, adenine pairs with thymine and guanine pairs with cytosine due to hydrogen bonding properties. Thus, thymine and guanine are not complementary bases and cannot form a stable base pair.
cytosine and guanine
Guanine base pairs with cytosine in RNA through three hydrogen bonds.
Guanine. In DNA, cytosine forms hydrogen bonds with guanine through three hydrogen bonds, creating a stable base pair. This complementary pairing is essential for maintaining the double-stranded structure of the DNA molecule.