hydrogen bonds
Bases
There are four major types of bases in DNA. They include adenine, guanine, cytosine and thymine (A,G,C,T). However, we now know by a recent report in Science journal there are at least 8 bases in DNA. They include methylated C bases, and two intermediates of the methylation process. One might predict that other modifications of DNA probably occur, and will be discovered as the fine structure of DNA is examined more closely. Therefore, it is probably more scientifically correct to say that there are four MAJOR types of bases in DNA.
RNA Polymerase is the enzyme responsible for adding RNA nucleotides to make mRNA.
The four main nucleotides are Guanine (G), Cytosine (C), Thymine (T) and Adenine (A). DNA is a universal code which means that each nucleotide will have the same meaning in almost all species. There are a few exceptions however, including Viruses with RNA genomes instead of DNA genomes. In these cases, Thymine is switched with a nucleotide called Uracil (U) and so the four nucleotides become G, C, U & A.
Nucleotides are repeating subunits that make up DNA.
Four Nucleotides
Nucleotides Four nucleotides are needed to make a DNA molecule.
Bases
DNA is made up of four types of nucleotides: adenine (A), cytosine (C), guanine (G), and thymine (T). These nucleotides form long chains that combine to create the genetic code that determines an organism's traits.
The subunits that make up the DNA molecule are DNA nucleotides. Each DNA nucleotide contains a deoxyribose sugar molecule, a phosphate group, and one of four nitrogen bases; adenine, guanine, cytosine, or thymine.
The sequence of four nucleotide 'bases' found in an organism's DNA "provides" an Organism's genetic make-up.
The monomers of nucleic acids are nucleotides. DNA nucleotides are composed of the sugar deoxyribose, a phosphate group, and one of four nitrogen bases: adenine, guanine, cytosine, and thymine. RNA nucleotides are composed of the sugar ribose, a phosphate group, and one of four nitrogen bases: adenine, guanine, cytosine, and uracil.
Four different ribonucleotides are present in RNA. They are Uracil, Adenine, Guanine and Cytosine.
Monosaccharides make up carbohydrates. Amino acids make up proteins. fatty acids and glycerols for lipids. Nucleotides for nucleic acids
DNA nucleotides. Note that adenine, thymine, cytosine and guanine are NOT nucleotides, but they are only the bases which make the nucleotides different.
There are four major types of bases in DNA. They include adenine, guanine, cytosine and thymine (A,G,C,T). However, we now know by a recent report in Science journal there are at least 8 bases in DNA. They include methylated C bases, and two intermediates of the methylation process. One might predict that other modifications of DNA probably occur, and will be discovered as the fine structure of DNA is examined more closely. Therefore, it is probably more scientifically correct to say that there are four MAJOR types of bases in DNA.
Nucleic acids are made from nucleotides. The nucleotides are adenine, guanine, thymine, and cytosine. They make up DNA, which is a nucleic acid.