Biology Study Set 1

In __________ organisms,the primary function of a gene in a cell is to participate in regulating the body as a whole and not to responding to the cell's immediate environment.

The maintenance of a constant environment in a cell is called ___________.

A bacterial cell takes advantage of changing __________ conditions through control of gene expression.

In multicellular organisms,gene _________ is critical for directing development and maintaining homeostasis.

Eukaryotic cell mRNA transcripts tend to be very ______ and can remain in the cell for hours.

The most common form of regulation in bacteria and eukaryotes is

Transcriptional control-proteins increase the rate of transcription by binding to

All regulatory proteins have common DNA binding motifs,which are particular bends in their protein chains that permit them to interlock with the

Vertebrate cells apparently possess a protein that by binding to clusters of 5-methylcytosine ensures that the bound gene will stay in the "off" position.This control on the role of gene regulation is a result of

Regulatory proteins shut off transcription by binding to a site immediately in front of the promoter and often even overlapping the promotor.This site is referred to as the

Histones are tightly packed into ______,which are located within the DNA.

Which of the following is the hallmark of multicellular organisms?

Enhancers are the binding sites for the

The most common form of control of gene expression in both the prokaryotic and eukaryotic organisms is

A nucleosome contains ____ histones within its core.

The basic tool of genetic regulation is the ability of certain proteins to bind to specific

DNA methylation,adding a methyl group to DNA nucleotides,in vertebrates ensures that

Which of the following is not true about control of gene expression?

RNA polymerase binds to a site on DNA called the

Small RNAs,once thought to be of no importance in gene expression contain