Transcription translation steps11/9/2023 The synthesis of new proteins begins with the transcription. Tip: start a Flash animation of the Bioplek (Dutch) on the structure of DNA and DNA replication Depending whether a cell in interphase (see mitotic stages) is in the G1, S or G2 phase, it can thus carry unreplicated (single) chromosomes or -partially- replicated chromosomes (consisting of two chromatides). Replication begins with local decondensation and separation of the double DNA helices, so that the DNA molecule becomesaccessible for enzymes that make a complementary copy of each strand.ĭuring replication a single chromosome is duplicated to form a double unit composed of two chromatides, attached together at the centromere. Replication versus transcription/translationĬlick for a zoom of these illustrations right image adapted from Talking Glossary of Genetics permission for free useĭuring the S phase (S from synthesis), before cell division, DNA replication and control for errors of DNA takes place. Proteins are involved in all vital functions in cells, including enzymatic catalyzation, transport, storage, movement, support, signaling,defence and control. polypeptide, the precursors of proteins). The protein synthesis occurs by means of transcrition (in the nucleus: production of RNA with nitrogenous bases that are complementary to one of the DNA strands thus DNA -> RNA) and translation (in polyribosomes and the rough endoplasmatic reticulum both located in the cytoplasm: RNA codes -> specific chains of aminoacids, i.e. Whether this cell division will eventually be a mitosis or a meiosis ( more on differences), in either case during replication the entire DNA is copied in which the genetical code is encrypted as a sequence of nitrogenous bases. Replication occurs in the S-fase in preparation to cell division during which the genetic information for the synthesis of proteins is transfered from the mothercell to the daughtercell. Replication is the process in which a cell makes an exact copy of its own DNA (copy DNA -> DNA). A = Adenine, C = Cytosine, G = Guanine, T = Thymine, U = Uracil
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |