Kinesin 1 Is Highly Processive Motor,taking More Than 100 Steps

question 43

Multiple Choice

Kinesin 1 is highly processive motor,taking more than 100 steps (covering 1 μm along a microtubule) before dissociating,primarily because

• A)it hydrolyzes ATP more rapidly than other motors.
• B)one of its two heads is always attached in it hand-over-hand mechanism.
• C)light chains at its nonmotor end attach to cargo vesicles.
• D)its efficiency of converting ATP hydrolysis energy to useful work is 60-70%.
• E)All are required for processivity.

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Definitions:

Exophthalmos

A condition characterized by a noticeable protrusion of the eyeballs, often associated with thyroid disease.

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A condition characterized by an overproduction of thyroid hormones, leading to symptoms such as increased metabolism, weight loss, and rapid heartbeat.

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A rare disorder characterized by the underproduction of hormones by the pituitary gland, affecting various bodily functions.

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The relationship between the sizes of different bones in the skeleton, which can affect overall body shape and function.