BIOL 4100 SUMMER HIGGINS TEST 4 EXAM QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTIONS VERIFIED LATEST
UPDATE
Which is the toughest and most durable of the different types of cytoskeletal
filaments?
A. myosin
B. dynein
C. actin filaments
D. microtubules
E. intermediate filaments
E. intermediate filaments
Intermediate filaments are found in what structure?
A. mitotic spindle
B. nuclear lamina
C. centrosomes
D. cilia
E. cell cortex
B. nuclear lamina
Which term best describes the structure of intermediate filament monomers?
tubelike
springlike
,meshlike
ropelike
ropelike
Which of the following types of intermediate filaments are found in all animal
cells?
A. vimentin and vimentin-related filaments
B. nuclear lamins
C. neurofilaments
D. keratin filaments
B. nuclear lamins
GTP hydrolysis and whether GTP or GDP is bound to tubulin is an important
mechanism to control the dynamic instability of microtubules. Certain aspects of
dynamic instability can be viewed using GFP-EB1. Which process(es) is it useful
for visualizing and why?
A. growing microtubules, because EB1 binds to the GTP-tubulin cap on
microtubules
B. growing and shrinking microtubules, because EB1 binds to the GTP-tubulin
cap on microtubules
C. growing and shrinking microtubules, because EB1 binds to the GDP-tubulin
cap on microtubules
D. shrinking microtubules, because EB1 binds to the GTP-tubulin cap on
microtubules
A. growing microtubules, because EB1 binds to the GTP-tubulin cap on microtubules
,How would the animation of microtubule dynamics change after adding a non-
hydrolyzable analog of GTP to the cells expressing GFP tubulin?
A. Microtubules would shrink.
B. Microtubules would grow longer.
C. Microtubule dynamics would not change.
D. Dynamic instability would increase as microtubules rapidly switch between
growing and shrinking.
B. Microtubules would grow longer.
What does the cellular motility of sperm depend on?
actin and kinesin
microtubules and kinesin
actin and myosin
microtubules and dynein
microtubules and dynein
Which of the following cytoskeletal structures are the most common for providing
tracks for guiding intracellular transport?
A. intermediate filaments
B. dyneins
C. kinesins
D. microtubules
E. actin filaments
D. microtubules
, What do microtubules resemble?
meshlike networks
ropelike strands
hollow tubes
interlocking chains
hollow tubes
Dynamic instability in microtubules stems from the intrinsic capacity of tubulin
molecules to hydrolyze what?
tubulin dimers
ATP
peptide bonds
water
GTP
GTP
Which of the following describes the structure of an actin filament?
A. It is a structure with a long tail and two globular heads.
B. It is a twisted chain of actin molecules.
C. It is a hollow cylinder made of actin molecules.
B. It is a twisted chain of actin molecules.
What is the name of the thin, sheetlike structures that a fibroblast regularly
extends during cell crawling?
A. lamellipodia
B. phagosomes
ANSWERS WITH COMPLETE SOLUTIONS VERIFIED LATEST
UPDATE
Which is the toughest and most durable of the different types of cytoskeletal
filaments?
A. myosin
B. dynein
C. actin filaments
D. microtubules
E. intermediate filaments
E. intermediate filaments
Intermediate filaments are found in what structure?
A. mitotic spindle
B. nuclear lamina
C. centrosomes
D. cilia
E. cell cortex
B. nuclear lamina
Which term best describes the structure of intermediate filament monomers?
tubelike
springlike
,meshlike
ropelike
ropelike
Which of the following types of intermediate filaments are found in all animal
cells?
A. vimentin and vimentin-related filaments
B. nuclear lamins
C. neurofilaments
D. keratin filaments
B. nuclear lamins
GTP hydrolysis and whether GTP or GDP is bound to tubulin is an important
mechanism to control the dynamic instability of microtubules. Certain aspects of
dynamic instability can be viewed using GFP-EB1. Which process(es) is it useful
for visualizing and why?
A. growing microtubules, because EB1 binds to the GTP-tubulin cap on
microtubules
B. growing and shrinking microtubules, because EB1 binds to the GTP-tubulin
cap on microtubules
C. growing and shrinking microtubules, because EB1 binds to the GDP-tubulin
cap on microtubules
D. shrinking microtubules, because EB1 binds to the GTP-tubulin cap on
microtubules
A. growing microtubules, because EB1 binds to the GTP-tubulin cap on microtubules
,How would the animation of microtubule dynamics change after adding a non-
hydrolyzable analog of GTP to the cells expressing GFP tubulin?
A. Microtubules would shrink.
B. Microtubules would grow longer.
C. Microtubule dynamics would not change.
D. Dynamic instability would increase as microtubules rapidly switch between
growing and shrinking.
B. Microtubules would grow longer.
What does the cellular motility of sperm depend on?
actin and kinesin
microtubules and kinesin
actin and myosin
microtubules and dynein
microtubules and dynein
Which of the following cytoskeletal structures are the most common for providing
tracks for guiding intracellular transport?
A. intermediate filaments
B. dyneins
C. kinesins
D. microtubules
E. actin filaments
D. microtubules
, What do microtubules resemble?
meshlike networks
ropelike strands
hollow tubes
interlocking chains
hollow tubes
Dynamic instability in microtubules stems from the intrinsic capacity of tubulin
molecules to hydrolyze what?
tubulin dimers
ATP
peptide bonds
water
GTP
GTP
Which of the following describes the structure of an actin filament?
A. It is a structure with a long tail and two globular heads.
B. It is a twisted chain of actin molecules.
C. It is a hollow cylinder made of actin molecules.
B. It is a twisted chain of actin molecules.
What is the name of the thin, sheetlike structures that a fibroblast regularly
extends during cell crawling?
A. lamellipodia
B. phagosomes
