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14 Cards in this Set
- Front
- Back
Structuralgenes |
genes that produce mRNA and encode polypeptides; also called structural genes. |
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Intergenicregions |
in a chromosome, a region ofDNA that lies between two different genes. |
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Originof replication |
a nucleotide sequence that functions as an initiation site for the assembly of several proteins required for DNA replication. |
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Repetitivesequences |
DNA sequences that are present in many copies in the genome.replica plating a technique in which a replica of bacterial colonies is transferred to a new petri plate. |
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DNAsupercoiling |
the formation of additional coils in DNA due to twisting forces. |
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TopoisomeraseI |
an enzyme that alters the degree ofsupercoiling in DNA. |
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Introns |
intervening sequences that are foundbetween exons. Introns are spliced out of theRNA prior to translation. |
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Telomeres |
specialized DNA sequences found at the ends of linear eukaryotic chromosomes. |
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Chromatin |
the association between DNA and proteins that is found within chromosomes. |
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Histoneproteins |
a group of proteins involved in forming the nucleosome structure of eukaryotic chromatin. |
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Loopdomains |
a segment of chromosomal DNA that is anchored by proteins, so it forms a loop. |
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Radialloop domains |
organization of chromatin during interphase into loops,often 25,000 to 200,000 bp in size, which are anchored to the nuclear matrix at matrix-attachment regions. |
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Euchromatin |
DNA that is not highly compactedand may be transcriptionally active |
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Heterochromatin |
highly compacted DNA. It isusually transcriptionally inactive. |