Course

Biochemistry

Study Pack

Set 15 Molecular Motors

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Question 1

(Multiple Choice)

Free
Which of the following is NOT correct regarding ciliary motion?

A)ATP-driven sliding or walking of dyneins occurs along microtubules.
B)Axonemes are surrounded by plasma membrane that is continuous with the plasma membrane of the cell.
C)Dynein molecules bridge between microtubules,alternating their "walking" along both bridging microtubules.
D)The result is a bending motion of the axoneme and subsequent bending of the cilia.

Answer

Question 2

(Multiple Choice)

Free
Which best defines negative cooperativity of Rep helicase from E.coli?

A)When 1 subunit binds DNA,the other releases from the DNA.
B)When both subunits are bound to DNA,ATP hydrolysis promotes release of both subunits.
C)ATP hydrolysis promotes DNA binding of both subunits simultaneously.
D)Once it binds ssDNA,binding dsDNA is prohibited.

Answer

Question 3

(Multiple Choice)

Free
How does intracellular movement of organelles in axons occur?

A)through axoneme motion through ATP-driven walking of dyneins along microtubules
B)through formation of ring-like structures around tubulin to move organelles
C)through progressive movement along DNA strands
D)through kinesin-mediated ATPase-driven movement along microtubules

Answer