If a given lymphocyte divides to form two daughter cells, both daughters bear antigen receptors with antigen specificities identical to each other and to the parental cell from which they arose, and so will any descendants they produce. The resulting population of lymphocytes, all arising from the same founding lymphocyte, is a clone. Which interleukin is responsible for clone production?

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#Question id: 28480

#Unit 5. Developmental Biology

which of the following cells synthesize the transcription factor Cdx2, which downregulates Oct4 and Nanog?

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#Question id: 32926

#Unit 2. Cellular Organization

Which one of the following statement is NOT correct regarding the cell-cycle control switch system?

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#Question id: 23658

#Unit 13. Methods in Biology

How many recombinant clones must be screened in order to be 99% certain that a particular gene is found in a YAC library of human DNA where the average size of an insert is 500 kbp? The human genome size is about 3.2 x 10⁶ kbp. 

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#Question id: 232

#Unit 1. Molecules and their Interaction Relevant to Biology

Vitamin K is important in the ________. 

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#Question id: 27122

#Unit 4. Cell Communication and Cell Signaling

Which of the following combination does NOT contribute tumor formation?