4345447
Question 1
Answer
-
Bacterial cell
-
Eukaryotic cell
-
plasma membrane
-
internal membrane
Question 2
Question
The plasma membrane is involved in ..
Answer
-
cell communication
-
import and export of molecules
-
cells growth
-
motility
-
protein reorganization
-
Ca2+ storage
Question 3
Question
The most common phospholipid in cell membranes
Answer
-
phosphatidylcholine
-
phosphatidylserine
-
phosphatidylglycerol
Question 4
Answer
-
choline
-
phosphate
-
glycerol
-
nonpolar (hydrophobic tails)
-
polar (hydrophilic head)
-
double bond
Question 5
Answer
-
energetically unfavorable
-
energetically favorable
Question 6
Question
The properties of the lipid bilayer ensure that the plasma membrane is extremely flexible and able to self repair
Answer
- True
- False
Question 7
Question
Membrane and proteins do not retain their orientation during transfer between cell compartments
Answer
- True
- False
Question 8
Answer
-
lumen
-
cytosol
-
extracellular fluid
-
transport vesicle
-
membrane protein
-
plasma membrane
-
cytosolic face
-
non-cytosolic face
Question 9
Answer
-
Transporters class
-
ion channels class
-
receptors class
-
anchors class
-
enzymes class
-
transporters and channels
-
anchors
-
receptors
-
enzymes
-
cytosol
-
extracellular fluid
Question 10
Answer
-
transmembrane
-
Monolayer associated alpha helix
-
lipid-linked
-
protein-attached
-
cytoso
-
barrel
Question 11
Question
Because the backbone of a polypeptide chain is hydrophilic, a transmembrane polypeptide chain usually crosses the lipid bilayer as...
Answer
-
a helix
-
a beta-sheet
-
a coil
Question 12
Question
Many single-pass transmembrane proteins are receptors for extracellular signals
Answer
- True
- False
Question 13
Answer
-
peptide bonds
-
alpha-helix
-
phospholipid
-
hydrogen bond
-
hydrophobic amino acid side chain
Question 14
Question
A transmembrane [blank_start]hydrophilic[blank_end] pore can be formed by [blank_start]multiple[blank_end] [blank_start]amphipathic[blank_end] α helices or β sheets
Answer
-
hydrophilic
-
hydrophobic
-
multiple
-
single
-
amphipathic
-
amphoteric
-
aliphatic
Question 15
Answer
-
Hydrophilic
-
Hydrophobic
-
aqueous pore
-
transmembrane alpha-helix
-
Pore
-
Beta sheet
-
hydrophobic core of the lipid bilayer
-
lipid bilayer
Question 16
Answer
-
apical plasma mebrane
-
lateral plasma mebrane
-
basal plasma membrane
-
protein A
-
tight junction
-
protein B
-
basal lamina
-
blood stream
Question 17
Question
The cytoskeleton
Answer
-
gives a cell its shape
-
allows the cell to organize its internal components
-
to move (‘bones and muscles’ of the cell)
-
protects the cell
-
gives pigmentation to the cell
Question 18
Question
How many types of protein filaments there are that form the cytoskeleton differ in their composition, mechanical properties, and roles inside the cell
Answer
-
3
-
4
-
5
-
2
-
6
Question 19
Answer
-
Intermediate filaments
-
microtubules
-
actin filaments
Question 20
Question
Ropelike fibers with a diameter of about 10 nm, made of fibrous proteins, can form a nuclear lamina or extend across the cytoplasm giving the cells mechanical strength, very flexible, may have great tensile strength, deform under stress but do not rupture
Answer
-
intermediate filaments
-
microtubules
-
actin filaments
Question 21
Question
Hollow cylinders made of protein tubulin, long and straight, one end attached to centrosome, outer diameter of about 25nm, rigid, rupture when stretched
Answer
-
intermediate filaments
-
microtubules
-
actin filaments
Question 22
Question
helical polymers of a protein, flexible, diameter about 7 nm, organized into linear bundles, two-dimensional networks, highly concentrated in the cortex (layer beneath the plasma membrane.
Answer
-
intermediate filaments
-
microtubules
-
actin filaments
Question 23
Answer
-
alpha-helical region of monomer
-
coiled-coil dimer
-
staggered tetramer of two coiled dimers
-
lateral association of 8 tetramers
-
addition of 8 tetramers to growing filam
Question 24
Answer
-
bundles of intermediate filaments
-
desmosome connecting two cells
Question 25
Question
Intermediate filaments meet at demos ones and provide stability so you cannot rip it easily apart
Answer
- True
- False
Question 26
Answer
-
keratin filaments
-
vimentin-related filaments and vimentin
-
neurofilaments
-
nuclear limins
-
in epithelial cells
-
in connective-tissue cells,muscle/glial
-
in nerve cells
-
in all animal cells
Question 27
Answer
-
nondividing cell
-
dividing cell
-
ciliated cell
-
cilium
-
poles of mitotic spindle
-
centrosome
Question 28
Question
How many protofilaments make 1 microtubule
Answer
-
13
-
12
-
10
-
15
-
9
Question 29
Question
microtubules do not have structural polarity
Answer
- True
- False
Question 30
Answer
-
protofilament
-
lumen
-
plus end
-
minus end
-
microtubule
-
tubulin heterodimer
Question 31
Question
Do microtubules have a direction
Answer
-
yes
-
no
Question 32
Answer
-
pair of centrioles
-
basal bodies
-
y-tubulin ring complex
-
nucleating sites
-
centrosome matrix
Question 33
Answer
-
nucleus
-
centrosome
-
growing microtubule
-
microtubule capping protein
-
unstable microtubules
-
stable microtubules
-
unpolarized cell
-
polarized cell
-
GTP hydrolysis
-
GTP-tubulin
-
GDP-tubulin
-
GTP-cap
-
dynamic instability
-
Growing microtubule
-
Shrinking microtubule
Question 34
Answer
-
ATPase
-
tall
-
globular head
-
kinesin
-
dynein
-
plus end
-
minus end
Question 35
Question
Many hair like cilia project from the surface of the epithelial cells that line the human respiratory tract.
Answer
- True
- False
Question 36
Answer
-
radial spoke
-
central singlet microtubule
-
outer dynein arm
-
inner dynein arm
-
bend
-
slide
-
+ATP
-
In isolated doublet microtubules
-
in a normal flagellum
Question 37
Question
thin, flexible protein threads with a polarized structure
Answer
-
actin filaments
-
microtubules
-
intermediate filaments
Question 38
Answer
-
actin with bound ATP
-
Actin with bound ADP
-
Treadmilling
-
Actin monomer
-
plus end
-
minus end
-
actin filament
Question 39
Answer
-
actin cortex
-
lamellipodium
-
substratum
-
myosin motor protons slide actin fil.
-
focal contacts
-
Further protrusion
-
Attachment
-
Contraction
-
cortex under tension
-
movement of unpolymerised actine
-
actin polymerization
Question 40
Answer
-
head
-
tail
-
+
-
-
-
vesicle
-
myosin-I
-
plasma membrane
Question 41
Answer
-
myosin-II molecule
-
myosin-II filament
-
myosin heads
-
bare region
-
myosin-II
-
plasma membrane
Question 42
Answer
-
nucleus
-
myofibril
-
sarcomere
-
Z disc
-
overlap region
-
thick filament (myosin-II)
-
Thin filament(actin)
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