Podcast
Questions and Answers
What is the composition of a microtubule?
What is the composition of a microtubule?
- Polymers of α-tubulin and β-tubulin (correct)
- Polymers of desmin and lamin
- Polymers of actin and tubulin
- Polymers of keratin and tubulin
What gives microtubules their polarity?
What gives microtubules their polarity?
- The presence of desmin
- The orientation of their subunits (correct)
- The composition of α-tubulin and β-tubulin
- The presence of lamin
How many parallel protofilaments compose a microtubule?
How many parallel protofilaments compose a microtubule?
- 8
- 20
- 13 (correct)
- 5
What forms the helical microtubule lattice?
What forms the helical microtubule lattice?
What is the process in which several tubulin molecules interact to form a microtubule seed?
What is the process in which several tubulin molecules interact to form a microtubule seed?
What is the change from growth to shrinkage of individual microtubules called?
What is the change from growth to shrinkage of individual microtubules called?
What tends to force the protofilament into a curved shape that is less able to pack into the microtubule wall?
What tends to force the protofilament into a curved shape that is less able to pack into the microtubule wall?
Where are microtubules generally nucleated from?
Where are microtubules generally nucleated from?
What do Microtubule associated proteins (MAPs) like Map2 and Tau do?
What do Microtubule associated proteins (MAPs) like Map2 and Tau do?
What is the structure composed of two centrioles and surrounded by a dense mass of protein termed the pericentriolar material?
What is the structure composed of two centrioles and surrounded by a dense mass of protein termed the pericentriolar material?
What causes the end of a protofilament to grow in a linear conformation that assembles into the cylindrical wall of the microtubule?
What causes the end of a protofilament to grow in a linear conformation that assembles into the cylindrical wall of the microtubule?
What is the process in which individual microtubules alternate between cycles of growth and shrinkage called?
What is the process in which individual microtubules alternate between cycles of growth and shrinkage called?
