What 2 things make up the side chain of the DNA molecule?
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.
What are the 2 molecules that make up the sides of the ladder or the side portion of a DNA molecule?
The two molecules that make up the sides of the ladder or the side portion of a DNA molecule are Sugars and phosphates. The molecules that meet across the middle, forming the steps of the “ladder’” are known as Nitrogen bases.
What makes up the steps of A DNA molecule?
The inside of the molecule, the “steps” of the staircase, are made of the nucleotide bases Cytosine, Guanine, Adenine, and Thymine. The single stranded templates dictate which bases get laid down. In this way, one DNA strand can become two.
Which type of molecule makes up DNA?
nucleotide bases
DNA is a linear molecule composed of four types of smaller chemical molecules called nucleotide bases: adenine (A), cytosine (C), guanine (G), and thymine (T). The order of these bases is called the DNA sequence.
What two things form the vertical side pieces of the ladder?
The structure of the double helix is somewhat like a ladder, with the base pairs forming the ladder’s rungs and the sugar and phosphate molecules forming the vertical sidepieces of the ladder.
Are the molecules that form the steps of the DNA ladder?
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 forms the steps of the ladder?
The steps of the ladder are made of two bases joined together with either two or three weak hydrogen bonds.
- Nucleotides. The basic building block of DNA is called a NUCLEOTIDE.
- Base Pairs.
- A-T or T-A and C-G or G-C.
- The Double Helix Model.
What makes the rungs of the ladder in DNA?
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.
What three types of molecules make up A DNA molecule?
DNA has three types of chemical component: phosphate, a sugar called deoxyribose, and four nitrogenous bases—adenine, guanine, cytosine, and thymine.
What 3 molecules make up DNA?
In turn, each nucleotide is itself made up of three primary components: a nitrogen-containing region known as a nitrogenous base, a carbon-based sugar molecule called deoxyribose, and a phosphorus-containing region known as a phosphate group attached to the sugar molecule (Figure 1).
How is DNA like a ladder?
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. These bases make up the ‘rungs’ of the ladder, and are attached to the backbone where the deoxyribose (sugar) molecules are located.
What forms the ring of the ladder of DNA?
What makes up the sides of the DNA 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), cytosine (C), and guanine (G). Click to see full answer
What makes up the sides of the 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), cytosine (C), and guanine (G).
What are the rungs in the DNA ladder?
The “rungs” in the DNA “ladder” are caused by the complementary base pairs–adenine, quanine, cytosine and thymine (A, G, C, T)–forming hydrogen bonds with their paired base on the other side.
How are the two sides of a DNA molecule held together?
Overall, the two sides of the DNA molecule are held together by the bonds between all the base pairs, like the intermeshed teeth of a very long zipper. Just like a zipper, the two sides can separate and then rejoin as needed.