The Principal Kinds of RNA and Their Structures

What kinds of RNA play a role in life processes  

The presence of a gene has not always predicted the development of the disease. Some individuals who have been shown 

DNA replication yields two DNA molecules identical to the original one, ensuring transmission of genetic information to daughter k. cells with exceptional fidelity. 

The sequence of bases in DNA is recorded as a sequence of complementary bases in a single-stranded mRNA molecule. 

Three-base codons on the mRNA corresponding to specific amino acids direct the sequence of building a protein. These codons are recognized by tRNAs (transfer RNAs) carrying the appropriate amino acids. Ribosomes are the machinery for protein k synthesis. 

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Ribonucleic acids RNAs). Besides reproducing itself, DNA acts as a template for the synthesis of ribonucleic acids, of which the three principal kinds are messenger RNA (mRNA), transfer RNA (tRNA) sometimes called soluble RNA , and ribosomal RNA (rRNA). The RNAs closely resemble DNA in general structure, but only a portion of each molecule is in the helical form, and they have ribose in place of deoxyribose, and uracil in place of thymine. All three kinds of RNA have some methylated bases. All types of RNA have their part to play in the synthesis of proteins. The details of protein synthesis differ little, whether taking place in bacteria or in the most highly evolved organisms. The molecular weights of all RNAs are lower than that of the parent DNA that of a typical mRNA is often about one million, and of a tRNA about 25 000. 

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