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

question 97

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.

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Definitions:

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A precision measuring tool used to measure small distances and angles with high accuracy, often in mechanical processes for alignment or calibration.

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