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Dictionary > Definitions > Sciences > ARN messenger
ARN messenger
Definition
The ARN messenger is a molecule made up of a bit, which represents the vector between the ADN and ribosome (responsible for the polypeptide translation).
Description
It results from a transcription of the ADN. One distinguishes from other differences between the ARN messenger and the ADN that the number of bits. Indeed the latter consists of a sugar called desoxyribose whereas the ARN has ribose. Another major difference, the 4 nitrogenized bases constituting of the ADN are: - A (adénine), - C (cytosine), - G (guanine), - T (thymine). At the ARN the thymine is replaced by uracil (U). Synthesized once, the ARN leaves the core by the pores nuclear and joined an organoid called ribosome in the compartment extra-nuclear power: cytoplasm. The ARN will then be translated by ribosome into sequence of amino acids at the origin of a future protein.
Author
Anwar Hossain
Author Email
anwtele@yahoo.com
References
Definitions to be consulted