 |
||
 |
 |
|
|
MedTerms Medical Dictionary |
||
|
||
A (adenine): In genetics, A stands for adenine, one member of the A-T (adenine-thymine) base pair in DNA. The other base pair in DNA is G-C (guanine-cytosine). Each base pair forms a "rung of the DNA ladder." A DNA nucleotide is made of a molecule of sugar, a molecule of phosphoric acid, and a molecule called a base. The bases are the "letters" that spell out the genetic code. In DNA, the code letters are A, T, G, and C, which stand for the chemicals adenine, thymine, guanine, and cytosine, respectively. In DNA base pairing, adenine always pairs with thymine, and guanine always pairs with cytosine. Adenine is also one of the bases in RNA. There it always pairs with uracil (U). The base pairs in RNA are therefore A-U and G-C. |
||
|
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Find a medical definition by using the A-Z listing (select a letter) |
||
|
Copyright © 1996-2003 MedicineNet,
Inc. All rights reserved. Information in the MedTerms Medical Dictionary is provided for informational purposes only and is not a substitute for professional medical advice. You should not use this information for diagnosing or treating a medical or health condition. You should carefully read all product packaging. If you have or suspect you have a medical problem, promptly contact your professional healthcare provider. |
| Main Navigation |
|
Use the A-Z listing (select a letter) to find a definition A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
|