QUESTION 13What is the mechanism by which microtubules can rapidly shrink, or undergo â catastrophe?â AAt low levels of ATP, tubulin subunits are not added to the + end of the microtubule. BAt low levels of GTP, beta-tubulin subunits at the + end of the microtubule hydrolyze GTP, undergo a conformational change, and destabilize the filament so that the filament starts to disassemble from the + end. CAt low levels of GTP, tau proteins are phosphorylated and bind to the microtubule to destabilize the + end. DAt high levels of GTP, tubulin subunits are more quickly added to the â end than to the + end of the microtubule, resulting in a shrinking + end of the microtubule. EAt low levels of ATP, the microtubules rapidly disassemble since ADP-bound tubulin subunits are lost at both the + and â ends of the filament.

Name: QUESTION 13What is the mechanism by which microtubules can rapidly shr
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Description: QUESTION 13What is the mechanism by which microtubules can rapidly shrink, or undergo â catastrophe?â AAt low levels of ATP, tubulin subunits are not added to the + end of the microtubule. BAt low levels of GTP, beta-tubulin subunits at the + end of

Introduction The cytoskeleton is the intracellular network of the proteins fibers that helps in…

Answered: QUESTION 13 What is the mechanism by…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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QUESTION 13

What is the mechanism by which microtubules can rapidly shrink, or undergo â catastrophe?â

	A	At low levels of ATP, tubulin subunits are not added to the + end of the microtubule.
	B	At low levels of GTP, beta-tubulin subunits at the + end of the microtubule hydrolyze GTP, undergo a conformational change, and destabilize the filament so that the filament starts to disassemble from the + end.
	C	At low levels of GTP, tau proteins are phosphorylated and bind to the microtubule to destabilize the + end.
	D	At high levels of GTP, tubulin subunits are more quickly added to the â end than to the + end of the microtubule, resulting in a shrinking + end of the microtubule.
	E	At low levels of ATP, the microtubules rapidly disassemble since ADP-bound tubulin subunits are lost at both the + and â ends of the filament.

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