Table of Contents
What makes up the sides of DNA?
The double helix looks like a twisted ladder—the rungs of the ladder are composed of pairs of nitrogenous bases (base pairs), and the sides of the ladder are made up of alternating sugar molecules and phosphate groups. Molecules of DNA range in length from hundreds of thousands to millions of base pairs.
What makes up a DNA handrail?
The rails of the ladder are made of alternating sugar and phosphate molecules. The steps of the ladder are made of two bases joined together with either two or three weak hydrogen bonds.
What makes up the sides or backbone of DNA?
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.
What molecules make up the sides of the DNA molecule?
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).
How are the rails of the ladder kept together?
The rails of the ladder are held together by the nitrogen containing bases: from one rail to the bases and from the bases to the other rail = to form rungs. The bases from one side of the ladder attach to the bases hanging from the other side; this keeps the ladder together.
What are the sides of the DNA ladder made of?
What three components make up DNA structure?
The Building Blocks of DNA DNA has three types of chemical component: phosphate, a sugar called deoxyribose, and four nitrogenous bases—adenine, guanine, cytosine, and thymine. Two of the bases, adenine and guanine, have a double-ring structure characteristic of a type of chemical called a purine.
What makes up the sides of the DNA molecule gizmo?
What are the two DNA components shown in the Gizmo? has two parts: – pentagonal sugar (deoxyribose) and a nitrogenous base.
What molecules make up the sides of a DNA molecule quizlet?
alternating sugar and phosphate molecules form the sides or “backbone” of the DNA molecule.
What are the rails of the DNA ladder made of?
The rails of the DNA strand are made up of deoxyribose (a sugar) and phosphoric acid. These two molecules alternate one after the other the entire length of the rail. The rungs of the DNA strand are made up of organic bases. These organic bases attach to the deoxyribose on the ladder rails.
What makes up the rungs of the twisted ladder?
They showed that alternating deoxyribose and phosphate molecules form the twisted uprights of the DNA ladder. The rungs of the ladder are formed by complementary pairs of nitrogen bases — A always paired with T and G always paired with C.
How are the rails of the ladder of DNA kept together?