Match the following proteins (Column I) with their function (Column II). Which of the following is correct?

Column I	Column II
a. Profilin	i. binds to the (+) end of an actin filament, thereby inhibiting subunit addition or loss.
b. Cofilin	ii. blocks (−) ends, inhibits filament disassembly, to stabilize filaments
c. Thymosin-β4	iii. involved in actin treadmilling, but it binds specifically to F-actin in which the subunits contain ADP
d. Cap Z	iv. binds ADP–G-actin and catalyzes the exchange of ADP for ATP
e. Tropomodulin	v. binds to ATP–G-actin in such a way that it inhibits addition of the actin subunit to either end of the filament.

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#Question id: 3867

#Unit 3. Fundamental Processes

RNA polymerase from E. coli (core enzyme alone) has all of the following properties except that it:

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#Question id: 2061

#Unit 2. Cellular Organization

Which of the following types of molecules are hydrophilic and therefore excluded from the hydrophobic portion of the phospholipid bilayer?

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#Question id: 10468

#Unit 6. System Physiology – Plant

Why are stomata required in leaf surface?

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#Question id: 1583

#Unit 4. Cell Communication and Cell Signaling

These cells are involved in cell-mediated immunity and destroy virally infected cells:

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#Question id: 5033

#Unit 11. Evolution and Behavior

Which of the following statements is correct in regard to Homo erectus?