Aragon. June 2004, option A, part A. Question 3 .- (2 points). September 2001, option B, question 4 .
Explain what they are:
c) microtubules (0.4 points)
Aragon September 2006, option B. Question 3
Answer the following questions:
a) Briefly explain a function carried out by the following molecules: microtubules (0.2 points)
Castilla La Mancha, June 2021, question 2.3
The three elements of the cytoskeleton are microfilaments (mostly actin), intermediate-sized filaments, and microtubules.
a. Define the latter (microtubules).
b. Name two organelles or cell structures formed from microtubules.
c. List TWO functions of the cytoskeleton.
Castilla La Mancha, July 2021, question 2.4
Colchicine (a drug extracted from plants of the genus Colchicum sp.), Is used as an anticancer and, in genetic studies, to make karyotypes. Its mechanism of action is simple: it binds to tubulin and prevents its polymerization, thus preventing the formation of the achromatic spindle and halting the mitosis process.
a. What is tubulin? Describe the structure of a microtubule.
b. What is the achromatic or mitotic spindle? At what point in mitosis does the spindle form?
c. What is a karyotype? What types of mutations can be detected with the karyotype?