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Ribonucleic acid (RNA) is a polymeric molecule essential in various biological roles in coding, decoding, regulation, and expression of genes. RNA and DNA are nucleic acids, and, along with lipids, proteins and carbohydrates, constitute the four major macromolecules essential for all known forms of life. Like DNA, RNA is ...


RNA definition, ribonucleic acid: any of a class of single-stranded molecules transcribed from DNA in the cell nucleus or in the mitochondrion or chloroplast, containing along the strand a linear sequence of nucleotide bases that is complementary to the DNA strand from which it is transcribed: the composition of the RNA ...


RNA definition: RNA is an acid in the chromosomes of the cells of living things which plays an important... | Meaning, pronunciation, translations and examples.


Define RNA: any of various nucleic acids that contain ribose and uracil as structural components and are associated with the control of cellular…


One of two types of nucleic acid made by cells. RNA contains information that has been copied from DNA (the other type of nucleic acid).


Definition of RNA - ribonucleic acid, a nucleic acid present in all living cells. Its principal role is to act as a messenger carrying instructions fr.


DNA is defined as a nucleic acid that contains the genetic instructions used in the development and functioning of all known living organisms. RNA molecules are involved in protein synthesis and sometimes in the transmission of genetic information. However unlike DNA, RNA comes in a variety of shapes and types.


Ribonucleic acid (RNA): A nucleic acid molecule similar to DNA but containing ribose rather than deoxyribose. RNA is formed upon a DNA template. There are several classes of RNA molecules. They play crucial roles in protein synthesis and other cell activities: Messenger RNA (mRNA) is a type of RNA that reflects the ...


Define RNA. RNA synonyms, RNA pronunciation, RNA translation, English dictionary definition of RNA. RNA A. adenine U. uracil C. cytosine G. guanine n. A nucleic acid present in all living cells and many viruses, consisting of a long, usually...