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The enzyme that separates the two strands of nucleotides in DNA is helicase. Enzymes are protein molecules that speed up chemical reactions.


DNA is a long molecule composed of two chains of smaller molecules called nucleotides, each which contain a region of nitrogen called the nitrogenous base, a carbon-based sugar molecule called deoxyribose and a region of phosphorus called the phosphate group. There are four types of nitrogenous base


The four types of nucleotides found in DNA are guanine, cytosine, adenine and thymine. These are nitrogenous bases and are subdivided into purines and pyrimidines. The purines are adenine and guanine, and the pyrimidines are cytosine and thymine.


The three subunits of a nucleotide are a nitrogenous base, a sugar and a phosphate group. Nucleotides are the building blocks of DNA and RNA molecules.


The three units that make up a nucleotide are phosphates, a five-carbon sugar and a nucleotide base. Five nucleotide bases make up nucleotides: adenine, thymine, guanine, cytosine and uracil.


A single nucleotide consists of a base, a five-carbon sugar and a phosphate group, which consists of phosphorous and oxygen. The base consists of adenine, thymine, guanine or cytosine, while the sugar is either ribose or deoxyribose.


Long chains of nucleotides are called nucleic acids. Two types of nucleic acids are found in organisms: deoxyribonucleic acid and ribonucleic acid. DNA consists of two nucleotide chains bonded to and wrapped around one another in a twisted ladder shape called a double helix.


A nucleotide is composed of a sugar, a phosphate and a heterocylic nitrogenous base. Nucleotides act as the monomers for nucleic acid polymers, energy carriers within the body and essential coenzymes.


According to Purdue University, nucleotides are used to construct nucleic acids, including DNA, tRNA, rRNA and mRNA. Nucleic acids are long polymers of nucleotides that store and transfer information and regulate processes within the cells of all life forms on Earth.


Nucleotides contain either ribose, found in RNA, or deoxyribose, found in DNA. Deoxyribose is not synthesized in the cell, it is produced by action of the enyme ribonucleotided reductase on ribonucleotide diphoshates. Ribose is the product of the pentose phosphate pathway.