What 2 molecules make up the backbone of DNA?
A sugar-phosphate backbone (alternating grey-dark grey) joins together nucleotides in a DNA sequence. The sugar-phosphate backbone forms the structural framework of nucleic acids, including DNA and RNA. This backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.
What is the backbone of DNA held together by?
phosphodiester bonds
Bases are held together by hydrogen bonds, and the DNA backbone is held together by phosphodiester bonds.
What kind of bond holds the 2 backbone molecules together?
hydrogen bonds
The two strands of a DNA molecule are held together by hydrogen bonds between the nitrogen bases on opposite strands.
What are the 2 strands of DNA called?
The double helix describes the appearance of double-stranded DNA, which is composed of two linear strands that run opposite to each other, or anti-parallel, and twist together. Each DNA strand within the double helix is a long, linear molecule made of smaller units called nucleotides that form a chain.
What are the 4 bases in DNA?
The four bases of DNA are: adenine (A), thymine (T), guanine (G), and cytosine (C).
What is the DNA backbone made of?
The “backbone” of the DNA molecule is made up of two components: sugars and phosphates . bases and sugars. nucleotides and phosphates.
What is the sugar phosphate backbone of DNA?
Sugar-phosphate backbone. A structural component of DNA that consists of 5-deoxyribose sugars and phosphate groups involved in carrying the genetic code. Sugar-phosphate backbone is linked tophosphodiester bond between carbon 4 and CH2 group that attached to phosphate ion thus make the DNA strand as double helix making it twist into a coil.
What is the structure of DNA?
The diameter of a DNA molecule is 20A °.