Cell Lecture 3

Description

1st year Biochemistry and molecular biology Quiz on Cell Lecture 3, created by MrSujg on 01/21/2016.
MrSujg
Quiz by MrSujg, updated more than 1 year ago
MrSujg
Created by MrSujg about 7 years ago
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Resource summary

Question 1

Question
Label the image
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

Question
Label the image
Answer
  • choline
  • phosphate
  • glycerol
  • nonpolar (hydrophobic tails)
  • polar (hydrophilic head)
  • double bond

Question 5

Question
Label the image
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

Question
Label the image
Answer
  • lumen
  • cytosol
  • extracellular fluid
  • transport vesicle
  • membrane protein
  • plasma membrane
  • cytosolic face
  • non-cytosolic face

Question 9

Question
Label the image
Answer
  • Transporters class
  • ion channels class
  • receptors class
  • anchors class
  • enzymes class
  • transporters and channels
  • anchors
  • receptors
  • enzymes
  • cytosol
  • extracellular fluid

Question 10

Question
Label the image
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

Question
Label the image
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

Question
Label the image
Answer
  • Hydrophilic
  • Hydrophobic
  • aqueous pore
  • transmembrane alpha-helix
  • Pore
  • Beta sheet
  • hydrophobic core of the lipid bilayer
  • lipid bilayer

Question 16

Question
Label the image
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

Question
Label the image
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

Question
Label the image
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

Question
Label the image
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

Question
Label the image
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

Question
Label the image
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

Question
Label the image
Answer
  • protofilament
  • lumen
  • plus end
  • minus end
  • microtubule
  • tubulin heterodimer

Question 31

Question
Do microtubules have a direction
Answer
  • yes
  • no

Question 32

Question
Label the image
Answer
  • pair of centrioles
  • basal bodies
  • y-tubulin ring complex
  • nucleating sites
  • centrosome matrix

Question 33

Question
Label the image
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

Question
Label the iimage
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

Question
Label the image
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

Question
Label the image
Answer
  • actin with bound ATP
  • Actin with bound ADP
  • Treadmilling
  • Actin monomer
  • plus end
  • minus end
  • actin filament

Question 39

Question
Label the image
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

Question
Label the image
Answer
  • head
  • tail
  • +
  • -
  • vesicle
  • myosin-I
  • plasma membrane

Question 41

Question
Label the image
Answer
  • myosin-II molecule
  • myosin-II filament
  • myosin heads
  • bare region
  • myosin-II
  • plasma membrane

Question 42

Question
label the image
Answer
  • nucleus
  • myofibril
  • sarcomere
  • Z disc
  • overlap region
  • thick filament (myosin-II)
  • Thin filament(actin)
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