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18 Cards in this Set

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  • Back
the RNA complimentary to one strand of DNA; transcribed from genes and translated by ribosomes in proteins
messenger RNA
the enzyme- catalyzed assembly of an RNA molecule complimentary to a strand of DNA; the product may be messenger RNA, transfer RNA, or ribosomal RNA
the assembly of a protein or ribosomes, using messenger RNA to direct the order of amino acids
a class of RNA molecules that combine with certain proteins to form ribosomes
ribosomal RNA
a class of small RNA molecules with 2 functional sites- one for attachment of a specific amino acid, the other for carrying the nucleotide triplet for that amino acid
transfer RNA
the "language" fo the genes in which the nucleotide sequence of DNA(in triplets or codons) specifies the amino acid sequences of proteins
genetic code
the basic unit of the genetic code; a sequence of 3 adjacent nucleotides in DNA or messenger DNA that encodes an amino acid
3 nucleotide sequence in a transfer-RNA molecule that is complimentary to, and base pairs with, a specific codon in messenger RNA
a substance, secreted by cells or glands, that regulates the activities of cells and organs else where in the body; a chemical messenger
a class of RNA molecules that combine with certain proteins to form ribosomes
RNA polymerase
a segment of DNA that is transcribed into precursor messenger DNA; removed before the mRNA leaves the nucleus
a segment of DNA is transcribed into RNA and tranlsated into protein, specifying the amino acid sequence of a polypeptide
the proces that joins portions of the primary RNA transcript(exons) after the introns are removedl the joining of 2 pieces of DNA
a non living, infectious particle of nucleic acid, protein, and cometimes, lipid membrane that can replicate only inside of aliving cell
the direction for the transport of proteins to different parts of the cell; provided by the first few amino acid is synthesized on the ribosomes.
signal sequence
a vurus that infects baterica; also called a phage
referring to a virus that infects infects and destroys (lyses) subceptible cells
referring to a bacteriophage that infects a bacterium, inserts its DNA into the hosts DNA, and replicates with the host