polysomes
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are mRNAs with several ribosomes translating at once
rDNA
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rRNA genes are moderately repetitive and randomly repeated
Polyploidy
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occurs when more than two sets of chromosomes are present
GAL genes of yeast
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-inducible by the presence of galactose but only if the concentration of
glucose is low
-subject to catabolite repression
-the GAL 1 and GAL 10 genes are controlled by a central control region,
UASG, that contains four binding sites for the Gal 4 protein
mRNA
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template for protein synthesis
HDAC
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deacetylates histones, decreased transcription
,Activity of SXL
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-the sex lethal (Sxl), transformer (tra), and doublesex (dsx) genes are part of
a hierarchy of sex determination in Drosophila
-the Sxl gene acts as a switch that selects the pathway of sexual
development by controlling splicing of dsx transcript in a female-specific
fashion
Luria Delbruck test
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demonstrated that mutations are not adaptive but occur spontaneously
Initiation of translation in prokaryotes
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IF1 and IF3 interact with 30s ribosomal subunit
mRNA binds
fMet tRNA binds
50s subunit sandwiches mRNA in ribosome and IFs released
RNA polymerase
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, directs the synthesis of RNA using a DNA template. No primer is required.
the enzyme uses ribonucleotides instead of deoxyribonucleotides.
SOS repair system
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-allows DNA synthesis to become error-prone
-is mutagenic but may allow the cell to survive DNA damage that may
otherwise kill it
Postreplication repair
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occurs when DNA replication skips over a lesion and requires homologous
recombination mediated by the RecA protein
-MutS recognizes the mismatched pair
-MutH recognizes methylated parent strand and nicks daughter strand
-new strand is excised and replaced between nick and mismatched pair
RNA pol 2
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are mRNAs with several ribosomes translating at once
rDNA
Give this one a try later!
rRNA genes are moderately repetitive and randomly repeated
Polyploidy
,Give this one a try later!
occurs when more than two sets of chromosomes are present
GAL genes of yeast
Give this one a try later!
-inducible by the presence of galactose but only if the concentration of
glucose is low
-subject to catabolite repression
-the GAL 1 and GAL 10 genes are controlled by a central control region,
UASG, that contains four binding sites for the Gal 4 protein
mRNA
Give this one a try later!
template for protein synthesis
HDAC
Give this one a try later!
deacetylates histones, decreased transcription
,Activity of SXL
Give this one a try later!
-the sex lethal (Sxl), transformer (tra), and doublesex (dsx) genes are part of
a hierarchy of sex determination in Drosophila
-the Sxl gene acts as a switch that selects the pathway of sexual
development by controlling splicing of dsx transcript in a female-specific
fashion
Luria Delbruck test
Give this one a try later!
demonstrated that mutations are not adaptive but occur spontaneously
Initiation of translation in prokaryotes
Give this one a try later!
IF1 and IF3 interact with 30s ribosomal subunit
mRNA binds
fMet tRNA binds
50s subunit sandwiches mRNA in ribosome and IFs released
RNA polymerase
Give this one a try later!
, directs the synthesis of RNA using a DNA template. No primer is required.
the enzyme uses ribonucleotides instead of deoxyribonucleotides.
SOS repair system
Give this one a try later!
-allows DNA synthesis to become error-prone
-is mutagenic but may allow the cell to survive DNA damage that may
otherwise kill it
Postreplication repair
Give this one a try later!
occurs when DNA replication skips over a lesion and requires homologous
recombination mediated by the RecA protein
-MutS recognizes the mismatched pair
-MutH recognizes methylated parent strand and nicks daughter strand
-new strand is excised and replaced between nick and mismatched pair
RNA pol 2
Give this one a try later!
