The mRNAs found in prokaryotes differ from that of eukaryotes in the following ways: (i) The prokaryotic mRNAs are broken down by the ribonuclease into ribonucleotide, hence these are very short lived e.g. 2 minutes in E.coli. The short lived nature is due to changes in environmental conditions. In contrast the eukaryotic mRNAs have longer […]
Prokaryotic mRNAs and Eukaryotic mRNAs | Biochemistry
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Types of RNA (Ribonucleic Acid) | Biochemistry
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There are many types of RNAs, but three types of it are described here: 1. Ribosomal RNA (rRNA) 2. Messenger RNA (mRNA) 3. Transfer RNA (tRNA). Type # 1. The Ribosomal RNA (rRNA): The non-genetic RNAs are synthesized on the DNA template and are present in the nucleolus and cytoplasm. Therefore, the base sequences of […]
Processing of Pre-tRNA in E.coli and Yeast | Genetics
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In this article we will discuss about the processing of pre-tRNA in E.coli and yeast. In prokaryotes, there are many operons (e.g. 7 genes in E. coli) which are separated by spacer sequences. Mature tRNA molecules are generated by processing longer pre-tRNA transcripts. Through a specific step, RNases D, E, F and P generate these […]
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