Which sequences are required for the inhibitory phosphorylation of tyrosine and threonine residues which is essential for the regulation of mitotic CDKs?

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#Question id: 31278

#Unit 2. Cellular Organization

What will happen when E2Fs are bound to Rb?

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#Question id: 4540

#Unit 3. Fundamental Processes

Transcription of eukaryotic genes can be repressed in various ways. These include the four mechanisms

1. Competition	a-Repression is caused by recruiting histone modifiers that alter nucleosomes in ways that inhibit transcript
2. Inhibition	b-A repressor binds to a site on DNA beside an activator and interacts with that activator, occluding its activating region
3. Direct repression	c-By binding to a site on DNA that overlaps the binding site of an activator, a repressor can inhibit binding of the activator to a gene and thus block activation of that gene.
4. Indirect repression	d-A repressor binds to a site upstream of a gene and, by interacting with the transcriptional machinery at the promoter in some specific way, inhibits transcription initiation.

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#Question id: 15332

#Unit 4. Cell Communication and Cell Signaling

At the surface of B-cell contain antibody- IgM and IgD, How is the formation of IgD from IgM?

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#Question id: 2847

#Unit 2. Cellular Organization

Select the answer that describes a region of DNA in which genes are likely to be located.

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#Question id: 28377

#Unit 5. Developmental Biology

 Which of the following gene is activated in cells that have high levels of the Even-skipped, Fushi tarazu, or Paired & repressed in cells that have high levels of Odd-skipped, Runt, or Sloppy-paired?