E(var) mutations lie in genes whose products are needed to activate gene expression. They include members of the SWI/SNF complex

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#Unit 4. Cell Communication and Cell Signaling

All Myosins move toward the (+) end of an actin filament except myosin VI.

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#Unit 13. Methods in Biology

Steps of nick translation- 

Low concentrations of DNase I are used to make occasional single-strand nicks in the double-stranded DNA that is intended as the gene probe.

DNA polymerase then fills in the nicks, using an appropriate dNTP, at the same time making a new nick to the 3′ side of the previous one.

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#Unit 11. Evolution and Behavior

Deletion plays a key role in gene trafficking.which is the movement of genes to new sites in the genome.

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#Unit 6. System Physiology – Plant

Bacterial phytochrome is an example of a two-component signaling system in which phytochrome functions as a sensor protein that phosphorylates a response regulator.

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#Id: 613

#Unit 2. Cellular Organization

trp operon can run even in the presence of repressor. The attenuation system permits another 10-fold control over the operon’s activity. 

Thus, the combination of repression and attenuation controls the operon over a 700-fold range, from fully inactive to fully active: (70-fold [repression] X 10-fold [attenuation] = 700-fold).