Table of Contents
What makes up the side of a DNA ladder?
It consists of just a few kinds of atoms: carbon, hydrogen, oxygen, nitrogen, and phosphorus. Combinations of these atoms form the sugar-phosphate backbone of the DNA — the sides of the ladder, in other words. Other combinations of the atoms form the four bases: thymine (T), adenine (A), cytosine (C), and guanine (G).
What is the sugar of the DNA sides?
deoxyribose
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 sides of the DNA ladder and the rungs?
The phosphate and deoxyribose molecules form the sides of the DNA ladder while nitrogenous bases form the rungs. Each set of one phosphate molecule, one deoxyribose molecule and one nitrogenous base form a nucleotide group.
What is the frame or sides of the DNA ladder made up of?
The ladder is formed when two strands of DNA lie parallel to each other and are hydrogen-bonded together through the nitrogen-containing bases that form the “rungs.” Repeating deoxyribose sugar and phosphate groups make up the side rails of the ladder.
What makes up the sides of the DNA ladder quizlet?
The basic structural unit of DNA is made of a phosphate group, a sugar and a nitrogen base. Makes up the sides of the DNA ‘ladder’, alternating sugar-phosphate-sugar-phosphate. There are 4 different bases – A, C, T and G that make up the middle of the Double helix. All of an organism’s DNA information.
Why is sugar needed to make DNA?
Apart from being the carrier for the four bases (adenine, guanine, cytosine, and adenine) the sugar is the anchor for the phosphate (coming from the phosphodiester bonds of the triphosphate precursors) which sits then on the outside of the completed polymer. The phosphate moiety makes the final product the DNA an acid.
What is DNA sugar?
The sugar in deoxyribonucleic acid (DNA) is deoxyribose. The deoxy prefix indicates that the 2′ carbon atom of the sugar lacks the oxygen atom that is linked to the 2′ carbon atom of ribose (the sugar in ribonucleic acid, or RNA), as shown in Figure 5.2.
Why is the sugar in DNA called deoxyribose?
DNA’s sugar, deoxyribose, has five carbon atoms, which are connected to each other to form what looks like a ring. Four carbons plus an oxygen are part of the five-sided ring. The sugar in DNA is called a deoxyribose because it doesn’t have a hydroxyl group at the 2′ position.
What is the name of the sugar molecule in the DNA helix?
The sugar in DNA’s nucleotides is called deoxyribose—DNA is an abbreviation for deoxyribonucleic acid. RNA molecules use a different sugar, called ribose.