what kind of substance facilitates the bonding on nucleotides into a new DNA molecule?
2007-03-19 08:11:54 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Biology
enzyme ligase
2007-03-19 14:30:06 · answer #1 · answered by wesnaw1 5 · 0⤊ 0⤋
A nucleotide is a chemical compound that consists of 3 components: a heterocyclic base(purine or pyramidine), a sugar(ribose or deoxyribose), and one or more phosphate groups.
sugar is attached to the base on one side with glycosidic bond
sugar is attached to the phosphate group on the other side with 3-5 phosphate diester.
DNA is a long polymer of simple units called nucleotides.it has purine bases adenine and guanine and pyramidine base cytosine and thymine.
The DNA content of cell is said to be 10 power 9 nucletide pairs,a polynucleotide structure.
It is organised in the form of double helix ,two polynucleotide chains coiling around each other in opposite direction..they are anti parallel.If in one chain the linkage is 3-5,in the other it 'll be 5-3.
The two chains are held together by interchain binding forces which include hydrogen bonding between bases of two chains i.e., adenine of one chain with thymine of other and guanine of one with cytosine of other.
2007-03-19 16:27:45 · answer #2 · answered by ANITHA 3 · 0⤊ 0⤋
DNA-ligase
2007-03-19 15:16:45 · answer #3 · answered by platinto 2 · 0⤊ 0⤋
the nucleotides are linked together by 3,5 phospho diester linkage. there is no substance
2007-03-19 15:18:56 · answer #4 · answered by Maria Camilleri 1 · 0⤊ 1⤋
an enzyme
2007-03-19 15:15:03 · answer #5 · answered by Banana Slug 3 · 0⤊ 0⤋