Table of Contents
What is the difference between nucleotide and nitrogenous base?
A nucleotide is composed of a nitrogenous base, deoxyribose (five-carbon sugar), and at least one phosphate group. The nitrogenous bases are purines such as adenine (A) and guanine (G), or pyrimidines such as cytosine (C), thymine (T), and uracil (U).
What is the difference between nucleotides and bases?
Nucleotide is the single unit of a polynucleotide chain. It is composed of a pentose sugar ( ribose in RNA and deoxyribose in DNA ), a nitrogenous base (purine or pyrimidine) and a phosphate group. Whereas a base pair is a pair of a purine and a pyrimidine joined by hydrogen bonds , between two nucleotides.
How are the nitrogenous bases similar?
The nitrogenous bases in DNA are adenine (A), guanine (G), thymine (T), and cytosine (C). The nitrogenous bases in RNA are the same, with one exception: adenine (A), guanine (G), uracil (U), and cytosine (C).
What is the difference between nucleotide and nucleotide?
The main difference lies in their molecular composition as Nucleosides contain only sugar and a base whereas Nucleotides contain sugar, base and a phosphate group as well. A nucleotide is what occurs before RNA and DNA, while the nucleoside occurs before the nucleotide itself.
What is the difference between A base pair and A nucleotide pair?
Base pairs often are used to measure the size of an individual gene within a DNA molecule. The total number of base pairs is equal to the number of nucleotides in one of the strands (each nucleotide consists of a base pair, a deoxyribose sugar, and a phosphate group).
What nitrogen base most closely resembles cytosine?
Which nitrogen base most closely resembles cytosine and why? Thymine because they are both pyrimidines.
How do nitrogen bases bond with each other?
The nitrogen bases form the double-strand of DNA through weak hydrogen bonds. The nitrogen bases, however, have specific shapes and hydrogen bond properties so that guanine and cytosine only bond with each other, while adenine and thymine also bond exclusively. There are three hydrogen bonds in a G:C base pair.
What is the difference between a nucleotide and nucleoside give two example of each with their structure?
A nucleotide always contains a nucleoside that binds the one to three phosphate groups. A nucleoside is always composed of a pentose sugar and a nitrogenous base, which are the same as a nucleotide would have. Examples of nucleosides include cytidine, uridine, guanosine, inosine thymidine, and adenosine.
How do you identify nucleotide bases?
Explanation: Pyrimidines are nitrogenous bases with 1 ring structure, whereas purines are nitrogenous bases with 2 ring structures. Cytosine and thymine are pyrimidines since they both have one ring structure, whereas adenine and guanine are purines with two connected ring structures.
What is the difference between a nitrogenous base and nucleotide?
A nitrogenous base is attached to a sugar and somewhere between one to three phosphate groups in case of a nucleotide. A nitrogenous base is covalently attached to sugar which is either ribose or deoxyribose, however, there is no presence of the phosphate group here in case of a nucleoside. Nucleotide = Sugar + Base + Phosphate
What is the structural difference between DNA and RNA nucleotides?
The structural difference between nucleotides rests in two instances: A DNA nucleotide contains deoxyribose sugar, whereas an RNA contains the sugar ribose in every nucleotide. The nitrogenous bases in DNA can be adenine, guanine, cytosine, and thymine.
What is the chemical composition of a nucleotide?
Nucleotides are built of a nitrogenous base, a sugar and a phosphate group when it comes to chemical composition. Nucleosides are built of a nitrogenous base and a sugar, however, without the phosphate group when it comes to chemical composition.
How do nucleotides differ from pentose sugar molecules?
According to the type of pentose sugar molecule, nitrogenous base, and the number of phosphate groups, nucleotides differ. For example, in DNA, there is a deoxyribose sugar and in RNA, there is a ribose sugar. The phosphates are linked to the –OH group of carbon 5 of the sugar.