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SLS Bio12 DNA RY
SLS Bio12 DNA PoteinSynthesis RY
| Term | Definition |
|---|---|
| complementary base pairing | nucleotide bases fit together (H-bond) in a precise way: A-T, C-G, A-U |
| DNA helicase | unwinds the DNA. Helicases are enzymes that bind and may even remodel nucleic acid or nucleic acid protein complexes. |
| DNA polymerase | type of enzyme that is responsible for forming new copies of DNA, in the form of nucleic acid molecules |
| recombinant DNA | inserting DNA of another species (e.g. humans) into DNA of another species (e.g. bacteria) |
| replication | process by which DNA unwinds and makes exact copies of itself |
| semi-conservative replication | means that one strand of the parent double helix is conserved in each new DNA molecule. |
| anti-codon | complementary 3 base sequence on tRNA that binds to codon of mRNA during translation. |
| codon | a sequence of three DNA or RNA nucleotides that corresponds with a specific amino acid or stop signal during protein synthesis |
| DNA sequence (genetic code) | triplet code. 3 mRNA nucleotides code for one (and one only!) a.a. |
| elongation | tRNA transfers an amino acid to the tRNA corresponding to the next codon |
| environmental mutagen | a substance that may act as a mutagen in the environment of an organism |
| genetic disorder | a genetic problem caused by one or more abnormalities in the genome, especially a condition that is present from birth (congenital) |
| initiation | involves the small subunit of the ribosome binding to the 5' end of mRNA with the help of initiation factors (IF) |
| messenger RNA (mRNA) | messenger RNA, carries complementary code from DNA to specify amino acids. |
| mutation | a permanent alteration of the nucleotide sequence of the genome of an organism, virus, or extrachromosomal DNA or other genetic elements. |
| termination | Termination of the polypeptide happens when the A site of the ribosome faces a stop codon (UAA, UAG, or UGA). No tRNA can recognize or bind to this codon. |
| transcription | process by which complementary mRNA is produces off of one side of a DNA molecule |
| transfer RNA | transfer RNA. Carries a.a.'s to mRNA in translation. About 20 different ones |
| translation | process of assembling proteins according to mRNA instructions. Occurs along surface of ribosomes |