Cytoskeleton

Question 1

cytoskeleton is made up of what type of proteins

Answer 1

cytoskeletal

Question 2

Made up of 3 main classes of filament, which are

Answer 2

microtubules, intermediate filaments and microfilaments

Question 3

microfilaments are made up of

Answer 3

fine strands of actin(a globular protein), ~7nm diameter

Question 4

microfilament properties

Answer 4

they can assemble into filaments and then dissociate, very dynamic

Question 5

intracellular filaments function

Answer 5

they bind intracellular elements together as well as binding them to the plasmalemma, forming a network through the cytoplasm

Question 6

intermediate filaments properties

Answer 6

more than 50 types depending on type of cell, 10-15nm diameter

Question 7

structure of microtubules

Answer 7

hollow tubule made up of 2 tubulin sub units, as well as stability proteins (MAPS)

Question 8

what does MAPS stand for in microtubules

Answer 8

microtubule associated proteins

Question 9

microtubule function

Answer 9

make up mitotic spindles and serve as motorway of the cell

Question 10

explain motorway function of microtubules

Answer 10

proteins kinesin and dynein attach to the microtubules and move along them, dynein moves towards centre and kinesin outer of cell

Question 11

dynein and kinesin function

Answer 11

associate with organelles and vesicles in the cytoplasm and allow the to move within the cell by attaching to microtubules

Question 12

where do microtubules come from

Answer 12

originate from centrosome, in centre of cell and radiate outwards