In Order to Measure the Step Size of Kinesin,a Group

Multiple Choice

In order to measure the step size of kinesin,a group of investigators attached a small silica bead to the tail of a kinesin molecule.What advantage(s) did the attached silica bead provide?

A) The bead made kinesin activity visible.
B) The bead helped to denature kinesin making its properties easier to measure.
C) The bead provided a handle for manipulating and holding the motor using an optical trap.
D) The bead absorbed laser light in a manner proportional to the distance the motor moved.
E) The bead made kinesin activity visible AND provided a handle for manipulating and holding the motor using an optical trap.