Before the preovulatory surge in luteinizing hormone, granulosa cells of the follicle secrete which of the following?

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#Question id: 24231

#Unit 4. Cell Communication and Cell Signaling

Match the following classes of classical cadherins with their functions.

 

a. E-cadherin      1.present on many types of epithelial cells

b. N-cadherin      2.present on nerve, muscle and lens cells

c. P-cadherin       3.present on cells in the placenta & epidermis

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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: 1649

#Unit 4. Cell Communication and Cell Signaling

Which of the following gene clusters do NOT contribute to antigen binding?

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#Question id: 12778

#Unit 10. Ecological Principles

A population of white-footed mice becomes severely overpopulated in a habitat that has been disturbed by human activity. Sometimes intrinsic factors cause the population to increase in mortality and lower reproduction rates in reaction to the stress of overpopulation. Which of the following is an example of intrinsic population control?

TLS Online TPP Program

#Question id: 4100

#Unit 3. Fundamental Processes

some pre-mRNAs are spliced by an alternative, low-abundance form of the spliceosome. This rare form contains some components common to the major spliceosome, but it contains other unique components such as