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Unit 5 Molecular Gen
RNA
Question | Answer |
---|---|
messenger RNA | RNA molecule that carries copies of instructions for the assembly of amino acids into proteins from DNA to the rest of the cell |
transcription | process in which part of the nucleotide sequence of DNA is copied into a complementary sequence in RNA |
RNA polymerase | enzyme similar to DNA polymerase that binds to DNA and separates the DNA strands during transcription |
codon | three-nucleotide sequence on messenger RNA that codes for a single amino acid |
translation | Decoding of a mRNA message into a polypeptide chain |
mutation | change in a DNA sequence that affects genetic information |
point mutation | gene mutation involving changes in one or few nucleotides |
frameshift mutation | mutation that shifts the “reading” frame of the genetic message by inserting or deleting a nucleotide |
mutagen | agent that can induce or increase the frequency of mutations in organisms |
cell differentiation | process by which unspecialized cells develop into their mature form and function |
restriction enzyme | enzyme that cuts DNA molecules at specific nucleotide sequences |
gel electrophoresis | method of separating various lengths of DNA strands by applying an electrical current to a gel |
PCR | method for increasing the quantity of DNA by separating it into two strands and adding primers and enzymes |
primer | short segment of DNA that initiates replication by DNA polymerase |
DNA fingerprint | unique sequence of DNA base pairs that can be used to identify a person at the molecular level |
clone | genetically identical copy of a single gene or entire organism |
genetic engineering | process of changing an organism’s DNA to give the organism new traits |
recombinant DNA | genetically engineered DNA that contains genes from more than one organism or species |
plasmid | circular piece of genetic material found in bacteria that can replicate separately from the DNA of the main chromosome |
transgenic | organism whose genome has been altered to contain one or more genes from another organism or species |
genomic | study and comparison of genomes with a single species or among different species |
gene sequencing | process of determining the order of DNA nucleotides in genes and genomes |