What 2 components form the backbone of a DNA chain?
DNA consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups.
What are the 2 DNA components?
The DNA molecule consists of two strands that wind around one another to form a shape known as a double helix. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups. Attached to each sugar is one of four bases–adenine (A), cytosine (C), guanine (G), and thymine (T).
What type of backbone does DNA have?
sugar-phosphate backbone
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 backbone of DNA structure?
The backbone of a DNA molecule consists of the phosphate groups and the deoxyribose sugars, whereas the base region of the DNA molecule consists of the nitrogenous bases; therefore, the backbone of DNA is made up of phosphate groups and pentose sugars. Adenine is part of the base region of the molecule.
Which of the following make up the backbone of a polynucleotide strand?
Nucleotides are joined together by covalent bonds between the phosphate group of one nucleotide and the third carbon atom of the pentose sugar in the next nucleotide. This produces an alternating backbone of sugar – phosphate – sugar – phosphate all along the polynucleotide chain.
Which of the following is not a component of the nucleic acid backbone?
Explanation: Nucleic acids, that is, DNA and RNA show phosphodiesterase linkage which is the major type of linkage. Without the phosphodiester bonds between the phosphate and adjacent 3’OH sugar molecule the backbone will not be formed.
What makes up the backbone of DNA quizlet?
The backbone is comprised of alternating pairs of Sugars (Deoxyribose) and Phosphate groups. The rungs of DNA are comprised of pairs of Nitrogenous Bases. These bonds hold the nitrogen bases together.
Which component of DNA forms the backbone of the molecule quizlet?
The deoxyribose and the phosphate groups form the backbone of the nucleic acid molecule.
What is the backbone made up of?
The spine is made up of bones, muscles, tendons, nerves, and other tissues that reach from the base of the skull near the spinal cord (clivus) to the coccyx (tailbone).
What is the backbone of DNA structure?
What are DNA components?
DNA is made of chemical building blocks called nucleotides. These building blocks are made of three parts: a phosphate group, a sugar group and one of four types of nitrogen bases. To form a strand of DNA, nucleotides are linked into chains, with the phosphate and sugar groups alternating.
Which molecules make up the backbone of a nucleic acid?
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.
Which two components make up the backbone of a DNA molecule?
The Backbone of a DNA Molecule Is Made of Which Two Components? The backbone of the DNA molecule is made of a repeated pattern containing a sugar called deoxyribose and a phosphate group. The backbone is spatially arranged in the form of a double helix, with base pairs connecting the two sugar-phosphate strands.
What is the role of other DNA sequences?
Other DNA sequences are responsible for structural purposes or are involved in the regulation and use of genetic information. The structure of DNA can be compared to a ladder. It has an alternating chemical phosphate and sugar backbone, making the ‘sides’ of the ladder. (Deoxyribose is the name of the sugar found in the backbone of DNA.)
What is the structure of DNA?
Structure of DNA. The structure of DNA can be compared to a ladder. It has an alternating chemical phosphate and sugar backbone, making the ‘sides’ of the ladder. (Deoxyribose is the name of the sugar found in the backbone of DNA.) In between the two sides of this sugar-phosphate backbone are four nitrogenous bases: adenine (A), thymine (T),
How are complementary bases added to the original DNA strand?
Each half of the original DNA still has a base attached to its sugar-phosphate backbone. A new strand of DNA is made by an enzyme called DNA polymerase. It reads the original strand and matches complementary bases to the original strand. (The sugar-phosphate backbone comes with the new bases.)