Cell Lecture 3

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Question 1 of 42

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Bacterial cell

Eukaryotic cell

plasma membrane

internal membrane

Explanation

Question 2 of 42

The plasma membrane is involved in ..

Select one or more of the following:

cell communication
import and export of molecules
cells growth
motility
protein reorganization
Ca2+ storage

Explanation

Question 3 of 42

The most common phospholipid in cell membranes

Select one of the following:

phosphatidylcholine
phosphatidylserine
phosphatidylglycerol

Explanation

Question 4 of 42

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choline

phosphate

glycerol

nonpolar (hydrophobic tails)

polar (hydrophilic head)

double bond

Explanation

Question 5 of 42

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energetically unfavorable

energetically favorable

Explanation

Question 6 of 42

The properties of the lipid bilayer ensure that the plasma membrane is extremely flexible and able to self repair

Select one of the following:

True
False

Explanation

Question 7 of 42

Membrane and proteins do not retain their orientation during transfer between cell compartments

Select one of the following:

True
False

Explanation

Question 8 of 42

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lumen

cytosol

extracellular fluid

transport vesicle

membrane protein

plasma membrane

cytosolic face

non-cytosolic face

Explanation

Question 9 of 42

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Transporters class

ion channels class

receptors class

anchors class

enzymes class

transporters and channels

anchors

receptors

enzymes

cytosol

extracellular fluid

Explanation

Question 10 of 42

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transmembrane

Monolayer associated alpha helix

lipid-linked

protein-attached

cytoso

barrel

Explanation

Question 11 of 42

Because the backbone of a polypeptide chain is hydrophilic, a transmembrane polypeptide chain usually crosses the lipid bilayer as...

Select one of the following:

a helix
a beta-sheet
a coil

Explanation

Question 12 of 42

Many single-pass transmembrane proteins are receptors for extracellular signals

Select one of the following:

True
False

Explanation

Question 13 of 42

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peptide bonds

alpha-helix

phospholipid

hydrogen bond

hydrophobic amino acid side chain

Explanation

Question 14 of 42

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A transmembrane ( hydrophilic, hydrophobic ) pore can be formed by ( multiple, single ) ( amphipathic, amphoteric, aliphatic ) α helices or β sheets

Explanation

Question 15 of 42

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Hydrophilic

Hydrophobic

aqueous pore

transmembrane alpha-helix

Pore

Beta sheet

hydrophobic core of the lipid bilayer

lipid bilayer

Explanation

Question 16 of 42

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apical plasma mebrane

lateral plasma mebrane

basal plasma membrane

protein A

tight junction

protein B

basal lamina

blood stream

Explanation

Question 17 of 42

The cytoskeleton

Select one or more of the following:

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

Explanation

Question 18 of 42

How many types of protein filaments there are that form the cytoskeleton differ in their composition, mechanical properties, and roles inside the cell

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Explanation

Question 19 of 42

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Intermediate filaments

microtubules

actin filaments

Explanation

Question 20 of 42

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

Select one of the following:

intermediate filaments
microtubules
actin filaments

Explanation

Question 21 of 42

Hollow cylinders made of protein tubulin, long and straight, one end attached to centrosome, outer diameter of about 25nm, rigid, rupture when stretched

Select one of the following:

intermediate filaments
microtubules
actin filaments

Explanation

Question 22 of 42

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.

Select one of the following:

intermediate filaments
microtubules
actin filaments

Explanation

Question 23 of 42

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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

Explanation

Question 24 of 42

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bundles of intermediate filaments

desmosome connecting two cells

Explanation

Question 25 of 42

Intermediate filaments meet at demos ones and provide stability so you cannot rip it easily apart

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True
False

Explanation

Question 26 of 42

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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

Explanation

Question 27 of 42

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nondividing cell

dividing cell

ciliated cell

cilium

poles of mitotic spindle

centrosome

Explanation

Question 28 of 42

How many protofilaments make 1 microtubule

Select one of the following:

Explanation

Question 29 of 42

microtubules do not have structural polarity

Select one of the following:

True
False

Explanation

Question 30 of 42

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protofilament

lumen

plus end

minus end

microtubule

tubulin heterodimer

Explanation

Question 31 of 42

Do microtubules have a direction

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Explanation

Question 32 of 42

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pair of centrioles

basal bodies

y-tubulin ring complex

nucleating sites

centrosome matrix

Explanation

Question 33 of 42

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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

Explanation

Question 34 of 42

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ATPase

tall

globular head

kinesin

dynein

plus end

minus end

Explanation

Question 35 of 42

Many hair like cilia project from the surface of the epithelial cells that line the human respiratory tract.

Select one of the following:

True
False

Explanation

Question 36 of 42

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radial spoke

central singlet microtubule

outer dynein arm

inner dynein arm

bend

slide

+ATP

In isolated doublet microtubules

in a normal flagellum

Explanation

Question 37 of 42

thin, flexible protein threads with a polarized structure

Select one of the following:

actin filaments
microtubules
intermediate filaments

Explanation

Question 38 of 42

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actin with bound ATP

Actin with bound ADP

Treadmilling

Actin monomer

plus end

minus end

actin filament

Explanation

Question 39 of 42

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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

Explanation

Question 40 of 42

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head

tail

vesicle

myosin-I

plasma membrane

Explanation

Question 41 of 42

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myosin-II molecule

myosin-II filament

myosin heads

bare region

myosin-II

plasma membrane

Explanation

Question 42 of 42

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nucleus

myofibril

sarcomere

Z disc

overlap region

thick filament (myosin-II)

Thin filament(actin)

Explanation

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	Created by MrSujg over 8 years ago

1st year Biochemistry and molecular biology Quiz on Cell Lecture 3, created by MrSujg on 21/01/2016.

Cell Lecture 3

Question 1 of 42

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Explanation

Question 2 of 42

The plasma membrane is involved in ..

Select one or more of the following:

Explanation

Question 3 of 42

The most common phospholipid in cell membranes

Select one of the following:

Explanation

Question 4 of 42

Label the image

Drag an answer into the correct orange point.

Explanation

Question 5 of 42

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Explanation

Question 6 of 42

The properties of the lipid bilayer ensure that the plasma membrane is extremely flexible and able to self repair

Select one of the following:

Explanation

Question 7 of 42

Membrane and proteins do not retain their orientation during transfer between cell compartments

Select one of the following:

Explanation

Question 8 of 42

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Explanation

Question 9 of 42

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Explanation

Question 10 of 42

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Explanation

Question 11 of 42

Because the backbone of a polypeptide chain is hydrophilic, a transmembrane polypeptide chain usually crosses the lipid bilayer as...

Select one of the following:

Explanation

Question 12 of 42

Many single-pass transmembrane proteins are receptors for extracellular signals

Select one of the following:

Explanation

Question 13 of 42

Label the image

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Explanation

Question 14 of 42

Select from the dropdown lists to complete the text.

A transmembrane hydrophilic hydrophobic( hydrophilic, hydrophobic ) pore can be formed by multiple single( multiple, single ) amphipathic amphoteric aliphatic( amphipathic, amphoteric, aliphatic ) α helices or β sheets

Explanation

Question 15 of 42

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Explanation

Question 16 of 42

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Explanation

Question 17 of 42

The cytoskeleton

Select one or more of the following:

Explanation

Question 18 of 42

How many types of protein filaments there are that form the cytoskeleton differ in their composition, mechanical properties, and roles inside the cell

Select one of the following:

Explanation

Question 19 of 42

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Explanation

Question 20 of 42

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

A transmembrane ( hydrophilic, hydrophobic ) pore can be formed by ( multiple, single ) ( amphipathic, amphoteric, aliphatic ) α helices or β sheets