The conversion of a stimulus into an action potential by a receptor cell is called ________.

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#Question id: 15987

#Unit 12. Applied Biology

Which of the following physical method involve in plant transformation?

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#Question id: 23169

#Unit 13. Methods in Biology

Indirect immunofluorescence microscopy uses an unlabeled primary antibody, followed by a fluorescently labeled 

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#Question id: 28687

#Unit 2. Cellular Organization

Which of the following organelles contain high concentration of Ca2+-binding proteins which facilitates Ca2+ storage?

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#Question id: 16136

#Unit 13. Methods in Biology

You obtain 6 BACs (of known order, as shown below) and 7 STSs (of unknown order) that derive from a region of mouse chromosome 16 whose genomic sequence has not yet been finished.   

 

By PCR (using 20-bp primers at either end of each STS), you test each of the 6 BACs for the presence (+) or absence (-) of each of the 7 STSs. You obtain the following results:

 

Is there a second STS at which you would like to sequence PCR products obtained using BACs as templates? If so, which BACs would you test in this way, and what sequencing results might you predict for each of the BACs tested?

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#Question id: 7211

#Unit 5. Developmental Biology

Choose the correct match.

Germ layers specifying signals	Result
a.     If either Nodal or Vg1 signaling is blocked	i.               No ectoderm induction
b.     If vegT mRNA depleted	ii.              No endoderm induction
c.     If smad2 phosphorylation inhibited	iii.            No mesoderm induction
	iv.            Ectoderm only