Term
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Definition
form of transcriptional control by early termination of mRNA synthesis
(initiated after start but before completion of transcription) |
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Term
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Definition
first portion of mRNA made
can fold into 2 different secondary structures:
one allows further transcription
other causes premature termination |
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Term
| leader sequence of tryptophan operon |
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Definition
| sequence in operon that encodes a short leader peptide, contains tandem tryptophan codons near its terminus which act as an attenuator (if tryptophan is plentiful leader peptide will be synthesized resulting in termination of transcription of operon) |
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Term
| clustered regulatory interspaced short palindromic repeats |
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Definition
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Term
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Definition
memory bank of hostile viral sequences alternating with identical repeated sequences
provides resistance to viruses by transcribing it and allowing it to base-pair with invading nucleic acids to target for destruction |
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Term
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Definition
| genetic element that cannot replicate independently of a living (host) cell but that possess an extracellular form |
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Term
| obligate intracellular parasites |
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Definition
| how viruses must live ( required to be in a host) |
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Term
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Definition
extracellular form of virus
AKA virus particle |
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Term
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Definition
| virus that infects bacteria |
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Term
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Definition
| ending for all viral family names |
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Term
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Definition
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Term
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Definition
| protein shell surrounding nucleic acid in virus |
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Term
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Definition
| assemblies of a protein or proteins into the smallest morphological unit seen with electron microscope |
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Term
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Definition
| complex of nucleic acid and protein packaged in the virion |
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Term
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Definition
| viruses with no envelope around the nucleocapsid |
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Term
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Definition
| viruses with lipid layer around nucleocapsid |
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Term
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Definition
| the symmetry of rod-shaped viruses |
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Term
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Definition
| the symmetry of spherical viruses |
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Term
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Definition
| symmetric structure containing 20 triangular faces and 12 vertices that is roughly spherical |
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