#Question id: 2452
#Unit 2. Cellular Organization
Intermediate filaments
a. are typically 6 nm in diameter.
b. are essential for cell motility.
c. may be used to diagnose the tissue of origin for many cancers.
d. are composed of globular subunits.
e. are formed from tetrameric subunits.
#Question id: 2453
#Unit 2. Cellular Organization
Keratins
a. are found in the nucleus.
b. are typically expressed in neuronal cells.
c. contain an acidic and a basic subunit.
d. function in cell adhesion.
e. are the major proteins of hair and horns.
#Question id: 2454
#Unit 2. Cellular Organization
In the cell, intermediate filament disassembly is triggered by
#Question id: 2455
#Unit 2. Cellular Organization
Cofilin:
#Question id: 2456
#Unit 2. Cellular Organization
If the activity of thymosin β4 was inhibited in fibroblasts, the overall effect would be:
#Question id: 2457
#Unit 2. Cellular Organization
The two proteins that play the most important role in actin microfilament elongation are: