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chapter 8 vocab
biology
| Term | Definition |
|---|---|
| nucleotide | monomer that forms DNA and has a phosphate group, a sugar, and a nitrogen-containing base |
| double helix | model that compares the structure of a DNA molecule in which 2 strands wind around one another to that of a twisted ladder |
| base pairing rules | rule that describes how nucleotides form bonds in DNA; adenine (A) always bond with thymine (T) and guanine (G) always bonds with cytosine (C) |
| replication | process by which DNA is copied |
| DNA polymerase | enzyme that makes bonds between nucleotides, forming an identical strand of DNA during replication |
| central dogma | theory that states that, in cells, information only flows from DNA to RNA to proteins |
| RNA | nucleic acid molecule that allows for the transmission of genetic information and protein synthesis |
| transcription | process of copying a nucleotide sequence of DNA to form a complementary strand of mRNA. |
| RNA polymerase | enzyme that catalyzes the synthesis of a complementary strand of RNA from a DNA template |
| messenger RNA (mRNA) | form of RNA that carries genetic information from the nucleus to the cytoplasm where it serves as a template for protein synthesis |
| ribosomal RNA (rRNA) | RNA that is in the ribosome and guides the translation of mRNA into a protein; also used as a molecular clock |
| transfer RNA (tRNA) | form of RNA that brings amino acids to ribosomes during protein synthesis |
| translation | process by which mRNA is decoded and a protein is produced |
| codon | sequence of 3 nucleotides that codes for 1 amino acid |
| stop codon | codon that signals to ribosomes to stop translation |
| start codon | codon that signals to ribosomes to begin translation; codes for the first amino acid in a protein |
| anticodon | set of 3 nucleotides in a tRNA molecule that binds to a complementary mRNA codon during translation |