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Theyre pyrimidines
Because Adenine and guanine both have two and cytosine and thymine have one.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoNitrogen Bases with one ring are called pyrimidines.......... the nitrogen bases are thymine, cytosine....or uracil......these are held together by a hydrogen bond
Wiki User
∙ 13y agolemonparty.org
Wiki User
∙ 10y agoGuanine is thus bonded to cytosine.
Wiki User
∙ 13y agopurines
Wiki User
∙ 13y agoPurines
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Can nitrogen form hydrogen bonds?
No element on its own can form hydrogen bonds. Only compounds where hydrogen is bonded to nitrogen, oxygen, or fluorine. Hydrogen bonded to carbon and sulfur (selenium?) can also participate in strong hydrogen bonding when these atoms are bound to electronegative elements or ligands. (Eg. HCN, CHCl3, CH3COSH)
Is hydrogen necessary in a hydrogen bond?
Yes,hydrogen is very essential.Hydrogen should be bound to O or F or N or may be Cl.
Can chlorine form hydrogen bond?
No. Only nitrogen, oxygen, and fluorine allow hydrogen bonding.But, hydrogen bonded to carbon and sulfur (selenium?) can also participate in strong hydrogen bonding when these atoms are bound to electronegative elements or ligands. (Eg. HCN, CHCl3, CH3COSH)Read more: Can_nitrogen_form_hydrogen_bonds
Why is hydrogen easier to liberate than the hydrogen in water?
The hydrogen in water is locked into a very stable molecule consisting of two Oxygen atoms and four Hydrogen. In order to break that bond, energy (for example, an electric current) must be introduced. Free hydrogen is not bound to anything.
An bond is formed through a weak electrical attraction between a hydrogen atom bound to an electronegativeatom such as oxygen and nitrogen and another electronegative atom?
As long as the hydrogen is attached to Florine, oxygen, or nitrogen the bonding will be a hydrogen bond.
How many bonds hold the DNA nucleotides?
The bases in a DNA double helical chain are paired A-T and C-G. The A and T bases are bound by 3 hydrogen bonds per pair, and the C and G bases are bound by three hydrogen bonds per pair.
What bonds are in DNA and where are they found?
There are two types of bonds in DNA: phosphodiester bonds and hydrogen bonds. The phosphodiester bonds are the strong covalent bonds that create the phosphate-deoxyribose backbone. The hydrogen bonds links the "rungs" of the ladder, between nitrogen bases.
Why is DNA with lots of G and C were harder to separate than regions with lots of A and T?
BECAUSE these bases are bound to each other through 3 hydrogen bonds. where the A is bound with T through only 2 H-bonds. for this reason the GC pairing is stronger than AT pairing.
Where in the DNA are ionic bonds?
As far as I understand, DNA has no ionic bonds. The two 'halves' are bound together by Hydrogen bonds between base-pair amino acids.
How do the DNA bases pair up in a DNA molecule?
The bases pair up very specifically, Adenine to Thymine and Guanine to Cytosine. This absolute requirement for pairs allows the DNA to perfectly store the genetic code.
Is a hydrogen bond covalent?
Hydrogen bonds and covalent bonds are two completely different things. Covalent bonds share an electron, while hydrogen bonds (just for water molecules) act like magnets- the Oxygen atom has a slight negative charge and it "attracts" the Hydrogen atoms, which have a slight positive charge.
Two nucleotide base pairs in any segment of a DNA molecule?
Adenine and Thymine, Cytosine and Guanine - are pairs of bases that are said to be laterally bound together, using hydrogen bonds, in a complementary fashion. In the linear mode, two side-by-side bases are called di-nucleotides.
How are DNA molecules bound together to form a double helix?
The DNA strands are held together by hydrogen bonds between complimentary base pairs.
Why does the DNA duplex melt at a specific temperature?
The bonds between the bases of the two strands of DNA are hydrogen bonds (H-bonds). These are weaker bonds than the covalent bonds of the sugar-phosphate backbone. This means that when heat is applied, the H-bonds between the strand are broken and they separate. But the individual strands remain intact because of the backbone. Different segments of DNA will separate at different temperatures mostly because of the different G-C contents of the segment. There are 3 H-bonds between the bases G and C, but only 2 between A and T. This means that the more G-C contained in the segment of DNA, the more tightly the strands are bound together and the higher the temperature needed to separate them.
What is the difference between phosphodiester bonds and hydrogen bonds?
A phosphodiester bond are strong covalent bonds between a phosphate group and two 5-carbon ring carbohydrates over two ester bonds. A hydrogen bond is the electromagnetic attractive interaction between polar molecules where hydrogen is bound to a high electronegative atom. A phosphodiester bond is stronger than a hydrogen bond because of the covalent bonds.
What substances are fuels made of?
Fuels are made of Carbon and Hydrogen bound together as chemicals. The bonds in these chemicals store energy which is released when the fuels are burned in Oxygen.
Is amylum ionic or covalent?
It is generally considered ionic, but it could be considered both. The ammonium and chloride ions are bound to one another ionically, but the ammonium ion itself consists of a nitrogen atom covalently bound to four hydrogen atoms.
