1. The energy required for tubular polymerization isprovided by the hydrolysis of GTP.

A) True

B) False

2. Which of the following statements is correct withrespect to flagella and cilia?

A) cilia generate a force parallel to the cell surface

B) cilia have a helical pattern of movement

C)There are usually fewer cilia than flagella

D)flagella display an oarlike pattern of beating

E) cilia are generally longer than flagella

3. Muscle contraction occurs in a cyclic process. Whichof the following sequences is in the correct order?

A) power stroke, cross bridge formation, cross bridgedissociation, cocking of myosin

B)cross bridge formation, power stroke, cross bridgedissociation, cocking of myosin

C) cross bridge formation, cross bridge dissociation, cocking ofmyosin, power stroke

D) cross bridge formation, power stroke, cross bridgedissociation, power stroke, cocking of myosin

E) cross bridge formation, cocking of myosin, power stroke,cross bridge dissociation.

4. Choose all the statements below that are true fortight junctions

A) site of membrane fusion that are limited to abutting ridgesof adjacent membranes

B) allow the exchange of metabolites between the cytosols of twoadjacent cells

C) seal membranes of two adjacent cells tightly together

D) require connexons