When taken up by a cell, which of the following molecules binds to a repressor so that the repressor no longer binds to the operator? a) inducer b) promoter c) repressor d) corepressor

Repressor molecules bind toa) Operatorb) Promoterc) Enhancerd) Hormone response element

The /lac i/ gene:   a)is expressed constitutively. b) is not regulated. c) is not a part of the actual /lac/ operon. d) is a structural gene that codes for a repressor protein. e) encodes a product that binds to the /lac/ operator. f) all of the above.

Which of the following molecules is a protein produced by a regulatory gene? a) operon b) inducer c) promoter d) repressor

What is a possible outcome of the addition of a transcription factor such as Myod to the nucleus of a cell?  Assume that there are no other factors to either activate or prevent the response of the cell. Group of answer choices A) Production of mRNA from genes that were previously not expresed B)adding methyl groups to DNA C)prevention of protein synthesis D)uncoiling of the chromatin to allow transcription

The lac operon is an example of ________ control in which the presence of an ________ is required for transcription to occur. A) negative / activator B) negative / inducer C) positive / activator D) positive / inducer

In the trp operon, if a mutation occurred in the gene for the repressor so that it could bind to the operator even in the absence of tryptophan____________. a) the inducer cannot bind trpO, so operon gene transcription occurs b) the active repressor cannot bind trpO, so operon gene transcription is attenuated c)the active repressor binds tpO, so operon gene transcription is always repressed d) the repressor binds the corepressor, and operon gene transcription occurs.

Centers of transcriptional repression that are usually associated with lamina or found around nucleolus are  a) cajal bodies b) Barr bodies c) polycomb bodies d) None of these apply

Label these processes 1-8 (1 being the earliest time point) in the order they would occur during expression of a eukaryotic gene. a) Regulatory transcription factor binding at an enhancer b) transcription initiation c) Phosphorylation of the gene's protein product d) MRNA nuclear export e) general transcription factor binding to promoter f) chromatin remodeling to expose promoter g) splicing h) translation initiation

Answer these two multiple choice questions