Answer:
Guanine binds with Cytosine.
In DNA and RNA, nucleotides are the building blocks. Each nucleotide consists of three components: a phosphate group, a sugar molecule (deoxyribose in DNA and ribose in RNA), and a nitrogenous base.
There are four different nitrogenous bases found in nucleotides: Adenine (A), Thymine (T) in DNA (or Uracil (U) in RNA), Cytosine (C), and Guanine (G).
In DNA, Guanine (G) forms a specific base pair with Cytosine (C). This means that when a DNA strand is being synthesized, a Guanine base will always pair with a Cytosine base. Similarly, in RNA, Guanine (G) pairs with Cytosine (C).
The base pairing between Guanine and Cytosine is due to hydrogen bonding. Guanine and Cytosine form three hydrogen bonds with each other, creating a stable and complementary base pair.
So, to answer your question, Guanine binds with Cytosine.