(Abbr. RNA) Chemical chains made up on the sugar ribose attached to nucleic acid molecules. Different types of RNA exist in cells, some of which serve as the immediate code for proteins, some of which are involved in the physical process of protein synthesis. RNA can also serve instead of DNA as the only genetic information in certain viruses.

A polynucleotide consisting of a chain of sugar and phosphate units to which are attached various nitrogenous bases, (adenine, cytosine, guanine and uracil).

A molecule very similar to DNA except for the inclusion of a uracil nucleotide in place of thymine. Often shorted to RNA. It is often found in 'primitive' organisms such as viruses and archeobacteria, and is thought to have been around before DNA. It has some properties of an enzyme, and may have had several functions in the first early stages of the evolution of life. There are many different types of RNA present even now in cells - including yours! They act as an intermediate step between the DNA in the nucleus and proteins; they bring amino acids to ribosomes to build proteins, they form a large part of the structure of a ribosome, they are used to copy the information from a DNA gene into a form ribosomes can translate.

a type of nucleic acid which contains ribose, phosphate, and bases that contain nitrogen. Cellular forms include ribosomal RNA, messenger RNA and transfer RNA. It is also the genetic material in some viruses, e.g. HIV.

A long macromolecule formed from ribonucleotides. Functional classes include messenger RNA (mRNA), ribosomal RNA (rRNA), transfer RNA (tRNA), small nucleolar RNA (snoRNA), and other small RNAs.

One type of nucleic acid polymer. RNA nucleotidesâ€(tm) sugars contain one more oxygen atom than DNA nucleotidesâ€(tm) sugars. RNA nucleotides can have the nitrogenous bases adenine, cytosine, guanine, and uracil.

( ry-boh-noo- klay-ik) A type of nucleic acid consisting of nucleotide monomers with a ribose sugar and the nitrogenous bases adenine (A), cytosine (C), guanine (G), and uracil (U); usually single-stranded; functions in protein synthesis and as the genome of some viruses.

A single-stranded nucleic acid that plays a central role in protein synthesis and gene regulation. RNA contains ribose, in contrast to the deoxyribose in DNA.

Found in both the nucleus and cytoplasm of the cell. Contains direaction for DNA. In skin care formulations it reinforces the superficial skin cohesion and assists in moisture retention. Marine Origin.

A class of molecules composed of nucleotides, similar to those that form DNA. The major types of RNA are mRNA, tRNA, and rRNA, which play important roles in gene expression.

A nucleic acid occurring in all cells and involved in cell division, gene expression, and protein synthesis; also serves as the genetic material for some viruses.

(Abbreviation: RNA) An organic acid polymer composed of adenosine, guanosine, cytidine and uridine ribonucleotides. The genetic material of some viruses, but more generally is the molecule, derived from DNA by transcription, that either carries information (messenger RNA), provides sub-cellular structure (ribosomal RNA), transports amino acids (transfer RNA), or facilitates the biochemical modification of itself or other RNA molecules.

A nucleic acid consisting of a chain of nucleotides that contain the sugar ribose and the nitrogenous bases adenine, guanine, cytosine, and uracil.

a single-stranded nucleic acid; nucleotides consist of a base (adenine, cytosine, guanine, or uracil), ribose, and phosphate; the three types are messenger (m-RNA), transfer (tRNA), and ribosomal (rRNA), all of which are necessary for protein synthesis

( RNA) A macromolecular polymer of linked nucleotides in which the sugar residue is ribose. Usually, single-stranded.

A nucleic acid that transmits genetic information from DNA to the cytoplasm, and is involved in protein synthesis. Unlike DNA, the structure of RNA is typically single-stranded. There are several classes of RNA molecules, including messenger RNA, transfer RNA, ribosomal RNA, and other small RNAs, each serving a different purpose.

abbreviated as RNA. A nucleic acid present in all living cells. It acts as a messenger carrying instructions from DNA for controlling the synthesis of the proteins that are the essential fabric of all living organisms.

(biochemistry) a long linear polymer of nucleotides found in the nucleus but mainly in the cytoplasm of a cell where it is associated with microsomes; it transmits genetic information from DNA to the cytoplasm and controls certain chemical processes in the cell; "ribonucleic acid is the genetic material of some viruses"

Ribonucleic acid is a chemical relative of DNA. One form, messenger RNA (mRNA) is the intermediate stage between a gene and the protein it codes for.

a substance found within all living cells which is responsible for genetic transmission and making proteins.

RNA) A single-stranded nucleic acid molecule involved in protein synthesis. The structure of RNA is determined by DNA.

A single stranded stranded molecule that carries genetic information. RNA are composed or the sugar ribose, phosphate, and the bases adenine, uracil, guanine, and cytosine.

Like DNA, a type of nucleic acid. There are three major types: messenger RNA, transfer RNA, and ribosomal RNA. All are involved in the synthesis of proteins from the information contained in the DNA molecule. Synonyms: gene splicing, genetic engineering.

RI-bo-nu-KLAY-ik AS-id (RNA) A single-stranded nucleic acid consisting of nucleotides containing a phosphate, ribose, and nitrogenous bases adenine, guanine, cytosine, and uracil. 51

(RNA) -- A chemical that is very similar to one strand of the DNA double helix. RNA delivers important genetic messages to the cytoplasm of cells, where proteins are made. In RNA, the letter "U" replaces the letter "T" in DNA ("U" stands for Uracil).

A single-stranded nucleic acid normally used to make proteins. It is made up of nucleotide units containing the bases adenine, cytosine, guanine, and uracil (instead of thymine).

A single-stranded nucleic acid which is similar to DNA but having the base uracil in place of thymine , and a ribose sugar instead of deoxyribose.

A chemical substance made up of nucleotides compound of sugars, phosphates, and derivatives of the four bases adenine (A), guanine (G), cytosine (C), and uracil (U). RNAs function in cells as messengers of information from DNA that are translated into protein or as molecules that have certain structural or catalytic functions in the synthesis of proteins. RNA is also the carrier of genetic information for certain viruses. RNAs may be single or double stranded.

The substance that carries the coded genetic information from the deoxyribonucleic acid (DNA), in the cell nucleus, to the ribosomes, where the instructions are translated into the form of protein molecules.

1. A nucleic acid, found mostly in the cytoplasm-rather than the nucleus-of cells. RNA, like the structurally similar DNA, is a chain made up of subunits called nucleotides. RNA plays several roles in determining the synthesis of proteins. Messenger RNA replicates the DNA code for a protein and moves to sites in the cell called ribosomes. There, the much shorter transfer RNA (tRNA) assembles amino acids to form the protein specified by the messenger RNA. Most forms of RNA (including messenger and transfer RNA) consist of a single nucleotide strand, but a few forms of viral RNA that function as carriers of genetic information (instead of DNA) are double-stranded. Some viruses, such as HIV, carry RNA instead of the more usual genetic material DNA. See Cytoplasma; Retrovirus.

see Deoxyribonucleic acid (DNA)

molecule formed from nucleotides joined in a polynucleotide chain by means of bonding the phosphate of each nucleotide to a carbon atom of the adjacent nucleotide's ribose sugar subunit.

The abbreviation for ribonucleic acid, a form of genetic material. Life forms (with the exception of some viruses) use RNA as a temporary messenger molecule to carry information that is permanently stored in DNA.

Nucleic acid containing ribose sugar and the base Uracil; RNA functions in protein synthesis. The single starnded molecule transcribed from one strand of the DNA. There are three types of RNA, each is involved in protein synthesis. RNA is made up nucleotides containing the sugar ribose, a phosphate group, and one of four nitrogenous bases ( adenine, uracil, cytosine or guanine). PICTURE

a single-stranded nucleic acid that encodes genetic information. RNA is made up of sequence of 4 chemical building blocks (nucleotides) -- adenine, cytosine, guanine and uracil. RNA is involved in the transcription of genetic information; the information encoded in DNA is translated into messenger RNA (mRNA), which controls the synthesis of new proteins. RNA takes the place of DNA in retroviruses such as HIV. The presence of HIV RNA in the plasma indicates that the virus is actively replicating.

A molecule similar to DNA that functions primarily to decode the instructions for protein synthesis that are carried by genes. See also Messenger RNA; Transfer RNA.

(RNA) Along with DNA, one of the two forms of nucleic acid in living cells.

genetic element that is transcribed from DNA and subsequently translated to proteins. Since RNA is very unstable and since it is linked to the production of enzymes that catalyze the reactions in a bacterial cell, the amount of RNA gives so a view on the activity of a bacterial cell.

Linear, usually single stranded, polymer of ribonucleotides, each containing the sugar ribose in association with a phosphate group and one of 4 nitrogenous bases: adenine, guanine, cytosine, or uracil: it encodes the information for the sequence of amino-acids in proteins synthesized using it as a template. RT deoxyribonucleic acid.

RNA is generated from the DNA template in the nucleus of the cell through a process called transcription, and is then exported into the cell cytoplasm from the nucleus where it begins the process of protein synthesis.

A long chain, usually single-stranded nucleic acid. The primary function of RNA is related to the process of protein synthesis within the cell and more generally to the processes of expression and repression of hereditary information.

a single-stranded molecule composed of NUCLEOTIDE sequences. It is similar in basic structure to half of the double-stranded DNA. In cells, RNA transmits the code from the DNA-based GENES and instructs the cells' chemical machinery to produce structural PROTEINS and ENZYMES. The RNA segments in the cells represent copies of portions of the DNA sequences in the nucleus. In RETROVIRUSES, RNA is the sole repository of the viral genes.

A chemical found in the nucleus and cytoplasm of cells; it plays an important role in protein synthesis and other chemical activities of the cell. The structure of RNA is similar to that of DNA. There are several classes of RNA molecules, including messenger RNA, transfer RNA, ribosomal RNA, and other small RNAs, each serving a different purpose.

RNA; single strands of polynucleotides found in all cells; different types of RNA have different functions in the production

RNA)            A chain of nucleotides encoding instructions for making proteins.

Nucleic acid similar to DNA that contains uracil (whereas DNA contains thymine) and ribose sugar. Also, an organic acid composed of repeating nucleotide units of adenine, guanine, cytosine, and uracil, whose ribose components are linked by phosphodiester bonds.

A single-stranded molecule composed of chemical building blocks similar to those DNA. RNA is the sole genetic material of retroviruses and an intermediary in making proteins in all living cells.

A nucleic acid that plays an intermediate role between the information stored in DNA and actual synthesis of cellular proteins. RNA is distinguished from DNA by its single strandedness, the substitution of the nucleic acid base Uracil (in RNA) for Thymine (in DNA), and slightly different sugar back-bone.

Ribonucleic acid (RNA): A chemical found in the nucleus and cytoplasm of cells; it plays an important role in protein synthesis and other chemical activities of the cell. (IOGlossary)Ácido ribonucléico (RNA)... em todas as células animais e vegetais está presente DNA (ácido desoxirribinucléico) ou RNA (ácido ribonucléico)... (POUniverRS)

A type of nucleic acid consisting of nucleotides with a ribose sugar and the nitrogenous bases adenine, cytosine, guanine, and uracil (A, C, G, and U); usually single-stranded; functions in protein synthesis and as the genome of some viruses. Common types include mRNA, tRNA, and rRNA.

A polymer of nucleotides connected via a phosphate-ribose backbone, involved in protein synthesis.

A chemical cousin of DNA, RNA (ribonucleic acid) is responsible for translating the genetic code of DNA into proteins.

RNA. One of the two types of nucleic acids found in all cells. The other is deoxyribonucleic acid (DNA). Ribonucleic acid transmits genetic information from DNA to proteins produced by the cell.

A single stranded nucleic acid molecule that plays an important role in protein synthesis and other chemical activities of the cell. There are three types of RNA: messenger (mRNA), transfer, and ribosomal.

1. A nucleic acid, found mostly in the cytoplasm of cells, that is important in the synthesis of proteins. The amount of RNA varies from cell to cell. RNA, like the structurally similar DNA, is a chain made up of subunits called nucleotides. In protein synthesis, messenger RNA (mRNA) replicates the DNA code for a protein and moves to sites in the cell called ribosomes. There, transfer RNA (tRNA) assembles amino acids to form the protein specified by the messenger RNA. Most forms of RNA (including messenger and transfer RNA) consist of a single nucleotide strand, but a few forms of viral RNA that function as carriers of genetic information (instead of DNA) are double-stranded. 2. A nucleic acid associated with the control of chemical activities inside a cell. One type of RNA transfers information from the cell's DNA to the protein-forming system of a cell outside the nucleus. Some viruses (e.g., HIV) carry RNA instead of the more usual genetic material DNA. See also Cytoplasm; DNA; Retrovirus.

Nucleotide made from a ribose, a base [adenine (A), guanine (G), cytosine (C), and uracil (U)], and a phosphate group. RNA is generally found in the cell nucleus or cytoplasm.

A molecule composed of long chains of phosphate and sugar ribose along with several bases. One form is used by the cell to transfer information from DNA for assembling proteins.

This molecular species has an informational role, a structural role and an enzymic role and is used in a more versatile way than either DNA or proteins. Considered by many to be the earliest macromolecule of living systems. The structure is of ribose units joined in the 3' and 5' positions through a phosphodiester linkage with a purine or pyrimidine base attached to the 1' position. All RNA species are synthesised by transcription of DNA sequences, but may involve post-transcriptional modification.

A category of nucleic acids in which the component sugar is ribose and consisting of the four nucleotides Thymidine, Uracil, Guanine, and Adenine. The three types of RNA are messenger RNA (mRNA), transfer RNA (tRNA) and ribosomal RNA (rRNA).

A chemical similar to a single strand of DNA. In RNA, the letter U, which stands for uracil, is substituted for T in the genetic code. RNA delivers DNA's genetic message to the cytoplasm of a cell where proteins are made. [ Talking Glossary

(ri-bo-new-CLEE-ick acid) : a nucleic acid found in all cells that transmits genetic messages between structures in the cell. Usually referred to as RNA.