Match the following toxins (Column I) with their effects (Column II) on actin.

Column I	Column II
A. Cytochalasin D	i. Enhances nucleation by binding and stabilizing actin dimers and thereby lowering the critical concentration.
B. Latrunculin	ii. Binds at the interface between subunits in F-actin, locking adjacent subunits together and preventing actin filaments from depolymerizing.
C. Jasplakinolide	iii. Depolymerizes actin filaments by binding to the (+) end of F-actin, where it blocks further addition of subunits.
D. Phalloidin	iv. Binds and sequesters G-actin, inhibiting it from adding to a filament end.

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#Question id: 12106

#Unit 10. Ecological Principles

Which of the following best describes resource partitioning?

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#Question id: 2714

#Unit 2. Cellular Organization

HAT enzymes react with the side-chain of lysine to form the following structure. What effect will the HAT enzymes have on histones?

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#Question id: 4537

#Unit 3. Fundamental Processes

The enhancer DNA is __, but once the activators are bound it is relatively  , HMGA1 the DNA and thus helps the final structure form.

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#Question id: 1215

#Unit 4. Cell Communication and Cell Signaling

A cell responds to an external stimulus by increasing the intracellular Ca2+ concentration, releasing IP3 from the membrane, and producing salicylic acid. What kind of cell does this describe?

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#Question id: 10642

#Unit 10. Ecological Principles

Which curve best describes survivorship in a songbirds and marine crustacean that molts respectively?