IsChoice D Correct? 9 Which of the following statements about the cytoskeletonis
ID: 4387 • Letter: I
Question
IsChoice D Correct?
9
Which of the following statements about the cytoskeletonis true:
A
The cytoskeleton is entirely made up
of microtubules.
B
Motor proteins always move vesicles
away from the nucleus.
C
The cytoskeleton is a static structure
that maintains cell integrity.
D
Actin filaments play a key role in
almost all cell motility.
IsChoice D Correct?
9
Which of the following statements about the cytoskeletonis true:
A
The cytoskeleton is entirely made up
of microtubules.
B
Motor proteins always move vesicles
away from the nucleus.
C
The cytoskeleton is a static structure
that maintains cell integrity.
D
Actin filaments play a key role in
almost all cell motility.
Explanation / Answer
Well, A cannot be correct as the cytoskeleton is made up ofthree general components: - Actin filaments, the smallest of the components - Intermediate filaments, which bear the tension of thecell - Microtubules, which resist compression in the cell. Part B would be right, except for the word "always". Motorproteins do move vesicles away from the nucelus (usually forexocytosis) but they also move vesicles towards the nucleus afterendocytosis and moves vesicles around to different compartmentswithin the cell. The word "always" makes this one wrong too. Part C is partially correct: one of the jobs of thecytoskeleton is to maintain cell integrity (as you can see frompart A), however the cytoskeleton is DEFINATELY not static. Since A, B, and C are all wrong, D much be right. And itis.Related Questions
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