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18 Cards in this Set
- Front
- Back
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Nuclear envelope |
structure that divides the nucleus from its cytoplasm |
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The inner surface of the nuclear envelope is lined by the |
nuclear lamina |
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Nuclear pores contain the ____ that appears to fill the pore like a stopper |
nuclear pore complex (NPC) |
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Proteins syntehsized in the cytoplasm are targeted for the nucleus by the ______________ |
nuclear localization signal (NLS) |
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Chromosomes consist of _______ fibers, composed of DNA and associated proteins |
chromatin |
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The protein component of chromosomes include _____________, a group of highly conserved proteins |
histones |
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DNA and histones are organized into repeating subunits called |
nucleosomes |
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Euchromatin |
Returns to a dispersed state after mitosis |
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Heterochromatin |
Condensed during interphase |
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Constitutive Heterochromatin |
remains condensed all the time |
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Facultative heterochromatin |
inactivated during certain phases of the organism's life |
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Karyotype |
Preparation of homologous pairs ordered according to size |
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The end of each chromosome is called a _____ and is distinguished by a set of repeated sequences |
telomere |
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Telomerase |
a reverse transcriptase that synthesizes DNA from a DNA template |
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Centromere |
located at the site markedly indented on a chromosome |
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Differential Transcription |
eukaryotic cells determine which proteins are synthesized |
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DNA microarrays |
can monitor the expression of thousands of genes simultaneously |
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Transcription factors |
proteins that either act as transcription activators or transcription inhibitors |
