TLS Online TPP Program

#Question id: 5629


The second part of the acrosome reaction involves the extension of the acrosomal Process, this extension occur by

#Unit 5. Developmental Biology
  1. by the polymerization of  microtubules

  2. by the polymerization of globular actin molecules into actin filaments.

  3. by the polymerization of globular tubulin molecules into tubulin filaments.

  4. by the depolymerization of fillamentous actin into globular actin molecules.

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TLS Online TPP Program

#Question id: 2428

#Unit 2. Cellular Organization

Which of the following prevent(s) acting disassembly?

a. cytochalasin D         b. jasplakinolide          c. latrunculin               d. phalloidin

TLS Online TPP Program

#Question id: 2429

#Unit 2. Cellular Organization

Which of the following statements is (are) true of actin assembly?

a. ADP-actin can assemble into filaments.    

b. Actin (+) ends grow faster than actin (-) ends.

c. ATP-actin can assemble into filaments.

d. Toxins that alter the assembly of actin filaments have been used as tools to study actin in living cells.

TLS Online TPP Program

#Question id: 2430

#Unit 2. Cellular Organization

Actin-binding proteins that generate actin filament bundles:

TLS Online TPP Program

#Question id: 2431

#Unit 2. Cellular Organization

Examples of actin cross-linking proteins include

a. fimbrin.        b. dystrophin.  c. α-actinin.     d. spectrin.      e. myosin S1.

TLS Online TPP Program

#Question id: 2432

#Unit 2. Cellular Organization

Which of the following parts of myosin interact(s) with actin?

a. head             b. neck             c. tail              

d. essential light chain             e. regulatory light chain

TLS Online TPP Program

#Question id: 2433

#Unit 2. Cellular Organization

All types of myosins

a. bind and hydrolyze ATP.               

b. bind actin filaments.

c. form dimers.                       

d. contain an associated myosin light chain.

e. move toward the (+) end of an actin filament.