In some receptors (e.g., the insulin receptor), unphosphorylated activation loop prevents:

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#Question id: 2497

#Unit 2. Cellular Organization

Treadmilling through kinetochore microtubules can be observed by:

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#Question id: 4992

#Unit 11. Evolution and Behavior

The existence of the phenomenon of exaptation is most closely associated with which of the following reasons that natural selection cannot fashion perfect organisms?

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#Question id: 28243

#Unit 5. Developmental Biology

 which of the following cells exist in a regulatory microenvironment in Drosophila testes where the stem cells for sperm reside

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#Question id: 12406

#Unit 6. System Physiology – Plant

The β-oxidation of indole-3-butyric acid (IBA) to IAA takes place in___

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#Question id: 2280

#Unit 2. Cellular Organization

The smooth ER is especially abundant in cells that synthesize extensive amounts of