Nitrogenous base: Difference between revisions
No edit summary |
Author had not read the instructions on referencing or used the help system. Cleaned up the referencing. Please read the help. |
||
| Line 1: | Line 1: | ||
Nitrogenous bases are found in [[Nucleotide|nucleotides]]. There are four different nucleotides in DNA; [[Adenine|Adenine]] (A), [[Cytosine|Cytosine]] (C), [[Guanine|Guanine]] (G) and[[Thymine|Thymine]] (T) <ref>Alberts, BA,Johnson, AJ,Lewis, JL, Raff,MR, Roberts, KR, Walters, PW. 2008. The Cell. Fifth Edition. 197-198.</ref>. There is also a base called [[Uracil|Uracil however]] this only occurs in RNA. These are then grouped as either a [[Purine|Purine]] (A and G) or a [[Pyrimidine|Pyrimidine ]](C and T in DNA and U in RNA). A Purine always pairs with a pyrimidine.Purines are also bigger in size that pyrimidines.Nitrogenous bases are the key to base pairing; A will always bind with T in [[DNA|DNA]] unless in RNA where A will bind with U. G and C will always bind together regarless whether it is DNA or RNA <ref>Alberts, BA,Johnson, AJ,Lewis, JL, Raff,MR, Roberts, KR, Walters, PW. 2008. The Cell. Fifth Edition. 197-198.</ref>. The nitrogenous base is one of the three components of of a nucleotide which in turn join up to form DNA. The three components of a nucleotide are a [[Phosphate group|phosphate group]], a [[Pentose sugar|pentose sugar]] and a nirtogenous base <ref>Alberts, BA,Johnson, AJ,Lewis, JL, Raff,MR, Roberts, KR, Walters, PW. 2008. The Cell. Fifth Edition.116-117.</ref>.<br> | |||
=== Refrences === | |||
<references /><br> | |||
Revision as of 01:27, 24 October 2014
Nitrogenous bases are found in nucleotides. There are four different nucleotides in DNA; Adenine (A), Cytosine (C), Guanine (G) andThymine (T) [1]. There is also a base called Uracil however this only occurs in RNA. These are then grouped as either a Purine (A and G) or a Pyrimidine (C and T in DNA and U in RNA). A Purine always pairs with a pyrimidine.Purines are also bigger in size that pyrimidines.Nitrogenous bases are the key to base pairing; A will always bind with T in DNA unless in RNA where A will bind with U. G and C will always bind together regarless whether it is DNA or RNA [2]. The nitrogenous base is one of the three components of of a nucleotide which in turn join up to form DNA. The three components of a nucleotide are a phosphate group, a pentose sugar and a nirtogenous base [3].
Refrences
- ↑ Alberts, BA,Johnson, AJ,Lewis, JL, Raff,MR, Roberts, KR, Walters, PW. 2008. The Cell. Fifth Edition. 197-198.
- ↑ Alberts, BA,Johnson, AJ,Lewis, JL, Raff,MR, Roberts, KR, Walters, PW. 2008. The Cell. Fifth Edition. 197-198.
- ↑ Alberts, BA,Johnson, AJ,Lewis, JL, Raff,MR, Roberts, KR, Walters, PW. 2008. The Cell. Fifth Edition.116-117.