What makes up the outside strands of DNA?

What makes up the outside strands of DNA?

Nucleotides themselves are comprised of three joined parts: a sugar molecule, a phosphate group, and a nitrogenous base. The sugars of one nucleotide link to the phosphates of the adjacent nucleotide to form the exterior of the DNA strand, known as the sugar-phosphate backbone.

What molecules make up the outside of the DNA helix?

The sugar-phosphate backbones of the DNA strands make up the outside of the helix, while the nitrogenous bases are found on the inside and form hydrogen-bonded pairs that hold the DNA strands together.

What are the strands of DNA made of?

nucleotides
Each DNA strand within the double helix is a long, linear molecule made of smaller units called nucleotides that form a chain. The chemical backbones of the double helix are made up of sugar and phosphate molecules that are connected by chemical bonds, known as sugar-phosphate backbones.

Which components form the outer rails of a DNA molecule?

Which components form the outer “rails” of a DNA molecule? The sugars and phosphate groups.

What chemicals make up rungs?

The rungs of the ladder are pairs of 4 types of nitrogen bases. Two of the bases are purines- adenine and guanine. The pyrimidines are thymine and cytosine. The bases are known by their coded letters A, G, T, C.

What two molecules make up the sides of A DNA molecule?

The sides of the ladder are made of alternating sugar and phosphate molecules. The sugar is deoxyribose.

What four substances make up DNA and what do these substances do?

The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same in all people.

What makes up the rungs of the DNA molecule?

Other combinations of the atoms form the four bases: thymine (T), adenine (A), cytosine (C), and guanine (G). These bases are the rungs of the DNA ladder. Nucleotides are the units which, when linked sugar to phosphate, make up one side of a DNA ladder.

What chemicals make up the sides or backbone of the DNA molecule?

The backbone of DNA consists of a phosphate group and a deoxyribose. These two components are therefore connected by a phosphodiester bond.

What makes up each strand of DNA in the nucleus?

In the nucleus, DNA is always found as a double-stranded molecule. This means that one DNA molecule consists of two DNA strands. Each strand is made up of a DNA backbone (the phosphate groups and the pentose sugars) and the bases.

What are the outside rails of a DNA molecule?

The molecule is a long polymer with a backbone, or outside rails, consisting of alternating groups of sugar and phosphate. Nucleotide bases, which encode genetic information, hang off each sugar group.

Where are the nitrogen bases found in a strand of DNA?

To form a strand of DNA, nucleotides are linked into chains, with the phosphate and sugar groups alternating. The four types of nitrogen bases found in nucleotides are: adenine (A), thymine (T), guanine (G) and cytosine (C). The order, or sequence, of these bases determines what biological instructions are contained in a strand of DNA.

What are the three building blocks of DNA?

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. The four types of nitrogen bases found in nucleotides are: adenine (A), thymine (T), guanine (G) and cytosine (C).