With pulsed-field gel electrophoresis, which can separate DNA molecules up to 107 bp in length. The results of pulsed-field gel electrophoresis of the DNA from the yeast Saccharomyces cerevisiae are shown in Figure. How many chromosomes does S. cerevisiae have?

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#Question id: 14811

#Unit 4. Cell Communication and Cell Signaling

The development of both humoral and cell-mediated immune responses requires interaction of T cells with antigen that has been processed and presented together with MHC molecules. Which is correct for SUSCEPTIBILITY TO ANTIGEN PROCESSING AND PRESENTATION

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#Question id: 1182

#Unit 4. Cell Communication and Cell Signaling

Transcriptional activation downstream of the MAPK pathway involves:

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#Question id: 26899

#Unit 10. Ecological Principles

Which statement is correct about Temperate Grassland?

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#Question id: 2333

#Unit 2. Cellular Organization

Which portion of a phospholipid molecule is repelled by water?

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#Question id: 15670

#Unit 8. Inheritance Biology

A researcher would like to map the location of galE and trpA genes in a new species of bacterium that appears to be closely related to E. coli. He decides to use cotransduction, and generates appropriate donor and recipient strains. He is disappointed when cotransduction is not seen in his experiement. What is the most reasonable explanation for this situation?