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Ch. 10
Section 4: Protein Synthesis
| Term | Definition |
|---|---|
| Ribonucleic Acid (RNA) | a natural polymer that is present in all living cells and that plays a role in protein synthesis |
| Transcription | DNA acts as a template for the synthesis of RNA |
| Translation | the portion of protein synthesis that takes place at ribosomes and that uses the codons in mRNA molecules to specify the sequence of amino acids in polypeptide chains |
| Protein Synthesis | the formation of proteins by using information contained in DNA and carried by mRNA |
| Ribose | a cell organelle composed of RNA and protein; the site of protein synthesis |
| Messenger RNA (mRNA) | A single-stranded RNA molecule that carries the instructions from a gene to make a protein |
| Ribosomal RNA (rRNA) | part of the structure if ribosome |
| Transfer RNA (tRNA) | transfers amino acids to the ribosome to make a protein |
| RNA Polymerase | enzyme that catalyzes the formation of RNA on a DNA template, binds to a protein |
| Promoter | a nucleotide sequence on a DNA molecule to which an RNA polymerase molecule binds, which initiates the transcription of a specific gene |
| Termination Signal | a specific sequence of nucleotides that marks the end of a gene |
| Genetic Code | the rule that describes how a sequence of nucleotides, read in groups of three consecutive nucleotides (triplets) that correspond to specific amino acids, specifies the amino acid sequence of a protein |
| Codon | in DNA, a three-nucleotide sequence that encodes an amino acid or signifies a start signal or a stop signal |
| Anticodon | a region of tRNA that consists of three bases complementary to the codon of mRNA |
| Genome | the complete genetic material contained in an individual |