BIOL 4100 EXAM 4 REVIEW QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED GRADED A++

BIOL 4100 EXAM 4 REVIEW QUESTIONS AND ANSWERS

WITH COMPLETE SOLUTIONS VERIFIED GRADED A++

Actin filaments

a. are polar

b. are non-polar

c. could be either polar or non polar

a. are polar

Microtubules are

a. are polar

b. are non-polar

c. could be either polar or non-polar

a. are polar

Intermediate filaments

a. are polar

b. are non-polar

c. could be polar or non-polar

b. are non-polar

T/F: Actin filaments are associated with molecular motors

True

T/F: Intermediate filaments are associated with molecular motors

False

T/F: Microtubules are associated with molecular motors

, True

Actin binds

ATP

Tubulin binds

GTP

Intermediate filaments do not

bind nucleotides

What subunit(s) of tubulin can bind nucleotide triphosphate?

a. Both subunits

b. Only alpha subunit

c. Only beta subunit

a. Both subunits

What subunit(s) of tubulin can cleave nucleotide triphosphate?

a. only beta subunit

b. only alpha subunit

c. both alpha and beta subunits

a. only beta subunit

Which statement correctly describes directionality of various types of myosin?

a. all types of myosin walk toward plus end of filament

b. all types of myosin walk toward minus end of filament

c. most types of myosin walk toward plus end and few toward the minus end

d. most types of myosin walk toward minus end and few toward the plus end

c. most types of myosin walk toward plus end and few toward the minus end