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15 September, 21:18

Which of the following is not true?

a. microtubules require ATP hydrolysis for polymerization of dimers

b. microtubules have inherent polarity, plus and minus ends

c. microtubules are made of α-β tubulin dimers

d. free cytoplasmic microtubules have 13 protofilaments organized into the tubule

e. microtubules can be used to transport materials within cells

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  1. 15 September, 21:26
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    Answer: The following which is not true is letter A.

    Explanation: Because microtubules require GTP hydrolysis. The process requires energy from GTP hydrolysis. It occurs at the beta - tubulin subunit after incorporation of the tubulin dimer into the microtubule lattice.
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