Which nitrogen base has two binding sites?

Which nitrogen base has two binding sites?

The guanine nucleoside is called guanosine. , guanine is a subordinate of purine, consisting of an intertwined pyrimidine-imidazole ring framework with formed twofold bonds.

Which of the following nucleic acid base has two binding sites?

thymine. cytosine.

What is the maximum number of hydrogen bonds that guanine can be involved in as a donor and acceptor?

3 H-
Guanine has 3 H-bond donors. Guanine has 3 H-bond acceptors.

How many hydrogen bonds are present between adenine and guanine?

In Figure ​8 we plot the logarithm of the propensities of amino acids to form hydrogen bonds to adenine and guanine rings. In total we have 161 hydrogen bonds to adenine and 91 to guanine (counting only hydrogen bonds between the protein and either purine).

Which sugar is present in DNA?

deoxyribose
The sugar in deoxyribonucleic acid (DNA) is deoxyribose.

Which base is present in RNA but not in DNA?

Uracil
Pyrimidines include Thymine, Cytosine, and Uracil bases which are denoted by letters T, C, and U respectively. Thymine is present in DNA but absent in RNA, while Uracil is present in RNA but absent in DNA.

Is adenine a donor or acceptor?

(The lone pair of electrons on the oxygen atom in thymine molecule could act to form a third H-bond, but adenine does not have the required donor). The arrangement of donors and acceptors in thymine and guanine precludes formation of H-bonding pairs between these two compounds.

Is cytosine a donor or acceptor?

The amine group on cytosine can act as a hydrogen bond donor. Remember, to be a hydrogen bond donor the hydrogen atom must be bound to an electronegative atom. That hydrogen is bonded to carbon, which is not very electronegative.

What is the strongest bond in DNA?

hydrogen bond
A covalent bond is stronger than a hydrogen bond (hydrogen bonds hold pairs of nucleotides together on opposite strands in DNA). Thus, the covalent bond is crucial to the backbone of the DNA.