Binding of a signaling molecule to which type of receptor leads directly to a change in the distribution of ions on opposite sides of the membrane?

#Question id: 2337

#Section 3: Genetics, Cellular and Molecular Biology

Centrioles may have originated as

#Question id: 2415

#Section 3: Genetics, Cellular and Molecular Biology

Within an actin filament, each actin subunit is surrounded by how many neighboring actin subunits?

#Question id: 2433

#Section 3: Genetics, Cellular and Molecular Biology

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.

#Question id: 2437

#Section 3: Genetics, Cellular and Molecular Biology

Membrane extension involves

a. bending actin filaments.                   

b. myosin II.

c. the Arp2/3 nucleation of new filaments.

d. actin depolymerization.     

e. actin polymerization.

#Question id: 2447

#Section 3: Genetics, Cellular and Molecular Biology

In the axonemes, the arrangement of nine outer doublet microtubules, as well as the protofilament number of each outer doublet, is specified by

#Question id: 2449

#Section 3: Genetics, Cellular and Molecular Biology

What is the correct order of the stages of mitosis?

a. anaphase               

 b. metaphase              

c. telophase    

d. prophase                 

e. prometaphase