"They are small non-coding RNA molecules (~21–23 nucleotides in length) that fine-tune gene expression at the post-transcriptional level by guiding the degradation or translational repression of target mRNAs 3. MicroRNAs appear to be involved in various diseases, including cancer, cardiovascular disorders, and neurological conditions 4-7."
Expected headings
"Messenger RNA (mRNA)"
"Ribosomal RNA (rRNA)"
"Transfer RNA (tRNA)"
"MicroRNAs (miRNAs)"
"RNA (ribonucleic acid) is one of the two major nucleic acids in biological cells, the other being DNA; unlike DNA, RNA is single-stranded. The composition of the nucleotides and nucleosides is also partly different due to variations in the monosaccharide and base constituents: D-ribose sugar replaces 2-deoxy-D-ribose; and the base uracil replaces thymine 1."
"RNA (ribonucleic acid) is one of the two major nucleic acids in biological cells, the other being DNA; unlike DNA, RNA is single-stranded. The composition of the nucleotides and nucleosides is also partly different due to variations in the monosaccharide and base constituents: D-ribose sugar replaces 2-deoxy-D-ribose; and the base uracil replaces thymine 1."
"In the chromosomes, the genetic code contained in the DNA is transcribed to messenger RNA (mRNA) which passes from the nucleus to the ribosomes, the cytoplasmic organelles responsible for protein synthesis. There are as many mRNA molecules as there are proteins synthesised by the cell; its role is in fact, to act as a matrix on which "to mould" the polypeptide 1."
"RNA is usually subdivided into mRNA, rRNA and tRNA forms:"
"In the chromosomes, the genetic code contained in the DNA is transcribed to messenger RNA (mRNA) which passes from the nucleus to the ribosomes, the cytoplasmic organelles responsible for protein synthesis. There are as many mRNA molecules as there are proteins synthesised by the cell; its role is in fact, to act as a matrix on which "to mould" the polypeptide 1."