Transcription and Regulation
The binding of lac repressor to DNA could be considered to be analogous to

allosteric effects in enzyme regulation
competitive inhibition of an enzyme
uncompetitive inhibition of an enzyme
mixed-type inhibition of an enzyme

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Transcription and Regulation
The transcriptional regulatory proteins in eukaryotes which induce transcription usually have

at least two distinct domains of protein structure, a DNA binding domain and an activation domain
none of these
at least one distinct domains of protein structure, a DNA binding domain and an activation domain
at least two distinct domains of protein structure and a DNA binding domain

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Transcription and Regulation
Most transcripts of protein coding genes are cleaved

at the 3' end just before a poly adenylation signal
at the 5' end immediately before a poly adenylation signal
at the 3' end just after a poly adenylation signal
at the 5' end immediately after a poly adenylation signal

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Transcription and Regulation
The function of the sigma factor of RNA polymerase is to

assure that transcription ends at the proper point
assure that translation begins at the proper point
assure that transcription begins at the proper point
assure that translation ends at the proper point

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