Cytoskeleton Knowledge-Based Download PDF

Questions

1. 1.

   Which motor protein utilizes energy from ATP hydrolysis to transport cargo vesicles toward the plus end of microtubules during anterograde intracellular transport?

   • A) Dynein
   • B) Kinesin
   • C) Myosin
   • D) Keratin
2. 2.

   In eukaryotic cells, the axoneme of motile cilia and flagella is characterized by which structural arrangement of microtubules?

   • A) A ring of nine doublet microtubules surrounding two central single microtubules
   • B) A ring of nine triplet microtubules arranged without any central microtubules
   • C) A central core of nine single microtubules surrounded by two outer doublet microtubules
   • D) A ring of nine microfilament pairs surrounding two central intermediate filaments
3. 3.

   Which component of the eukaryotic cytoskeleton is constructed from various fibrous proteins, such as keratins, and functions primarily to bear mechanical tension and anchor organelles such as the nucleus in place?

   • A) Microtubules
   • B) Microfilaments
   • C) Centrosomes
   • D) Intermediate filaments
4. 4.

   Which component of the eukaryotic cytoskeleton is composed of two intertwined strands of actin polymers and forms the contractile ring that pinches the cytoplasm during animal cell cytokinesis?

   • A) Microtubules
   • B) Intermediate filaments
   • C) Microfilaments
   • D) Collagen fibers
5. 5.

   Which component of the eukaryotic cytoskeleton consists of hollow tubes formed from tubulin dimers and serves as the primary track for vesicle transport as well as the structural framework of the mitotic spindle?

   • A) Microtubules
   • B) Microfilaments
   • C) Intermediate filaments
   • D) Extracellular matrix fibers