The distinct characteristics of different cell types in a multicellular organism result mainly from the differential regulation of the

transcription of genes transcribed by RNA polymerase II.

How are most eukaryotic transcription regulators able to affect transcription when their binding sites are far from the promoter?

by looping out the intervening DNA between their binding site and the promoter

Combinatorial control of gene expression

involves groups of transcription regulators working together to determine the expression of a gene.

During the cytosolic degradation of mRNA, in ___ decay the deadenylating enzyme DAN shortens the polyA tail while in ___ decay a specific nuclease recognizes the UTR and rapidly degrades the mRNA.

deadenylation-dependent; deadenylation-independent

triggers promotion of heterochromatin

The long noncoding RNA Xist

is important for the formation of highly condensed heterochromatin on the X chromosome.

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control gene express

Question	Answer
The distinct characteristics of different cell types in a multicellular organism result mainly from the differential regulation of the	transcription of genes transcribed by RNA polymerase II.
___ -DNA interactions are among the tightest and most specific in molecular biology.	protein
An _____ is a group of bacterial genes that are transcribed from a single promoter	operon
The function of the genes that are part of the tryptophan operon are to	repressible inducible
What is the signal that activates the Trp repressor so it can bind to the operator?	tryptophan
When cellular tryptophan levels are high, the Trp operon is turned off.	True
The Lac operon is regulated by which of the following:	glucose and lactose
The ___ is the expanse of DNA involved in regulation of transcription including the promotor and other regulatory sequences.	gene control region
How are most eukaryotic transcription regulators able to affect transcription when their binding sites are far from the promoter?	by looping out the intervening DNA between their binding site and the promoter
___ activators are eukaryotic transcription regulators that bind to DNA packed away as heterochromatin in order to recruit other proteins regulators to modify the chromatin, making it available for transcription.	pioneer
Combinatorial control of gene expression	involves groups of transcription regulators working together to determine the expression of a gene.
___ alter chromatin by modifying lysines in the tail of histone proteins to allow greater accessibility to the underlying DNA	histone acetyltransferases
___ is triggered when a stop codon is detected between exon junction proteins in a test round of translation.	non-sense mediated decay
During the cytosolic degradation of mRNA, in ___ decay the deadenylating enzyme DAN shortens the polyA tail while in ___ decay a specific nuclease recognizes the UTR and rapidly degrades the mRNA.	deadenylation-dependent; deadenylation-independent
miRNA	regulate gene expression
siRNA	defense again foreign RNA
piRNA	triggers promotion of heterochromatin
The long noncoding RNA Xist	is important for the formation of highly condensed heterochromatin on the X chromosome.

Created by: user-1927187

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