Unit 2 (lecture quizzes) Flashcards
In which of the following organelles would you expect to find a protein destined to be secreted from a cell?
a) endosome
b) golgi apparatus
c) lysosome
d) secretory vesicle
e) endoplasmic reticulum
e) endoplasmic reticulum
The endoplasmic reticulum is a site for?
a) potassium storage in muscle cells
b) drug detoxification by catalase.
c) N-linked glycosylation of polypeptides.
d) addition of lipid residues.
e) degradation of foreign material brought into the cell by phagocytosis.
c) N-linked glycosylation of polypeptides.
Which of the following molecules forms the coat during receptor-mediated endocytosis-coated pit formation?
a) Mannose-6-phosphate
b) Clathrin
c) COPII
d) COPI
e) Tethering protein
b) Clathrin
Each of the following is part of the core oligosaccharide side chain in the ER except
a) N-acetyl glucosamine
b) erythrose
c) mannose
d) glucose
b) erythrose
On which of the following intracellular locations does clathrin organize a coat and form vesicles?
a) lysosomes
b) cell membrane
c) endoplasmic network
d) inner membrane of mitochondria
e) regulated secretory vesicles
b) cell membrane
Microfilament function in …?
a) muscle contraction
b) transport
c) cell division
d) maintenance of animal cell shape
e) all of the above
e) all of the above
Dynamic assembly and disassembly of a cytoplasmic microtubule in a cell occurs primarily at its plus end, because its minus end is usually anchored to…?
a) a basal body
b) an axoneme
c) a microtubule organizing center
d) a mitochondrial outer membrane
e) the plasma membrane
c) a microtubule organizing center
Capz …?
a) causes microfilaments to
lengwen by assembly at their plus ends.
b) depolymerizes microfilaments at their plus ends.
c) prevents assembly and disassembly at microfilament plus ends.
d) forms microfilament branches.
e) connects microfilaments to microtubules.
c) prevents assembly and disassembly at microfilament plus ends.
A microtubule-organizing center (MTOC)
a) contains centrioles in plant cells.
b) serves as a site for both microtubule and intermediate filament assembly.
c) anchors either end of cytoplasmic microtubules.
d) anchors only the minus ends of cytoplasmic microtubules.
e) usually is positioned near the cell membrane.
d) anchors only the minus ends of cytoplasmic microtubules.
Actin filaments may form each of the following except
a) gels
b) bundles
c) branched networks
d) bundles of parallel filaments
e) axonemes
e) axonemes
Actin bundles give shape and support to ____________ found in intestinal muscle cells.
a) cilia
b) flagella
c) microvilli
d) lamellipodia
e) stress fibers
c) microvilli
The Crumbs, Scribble, and PAR complexes control the planar polarity of the cell in an epithelium.
a) True
b) False
b) False
What type of proteins are Four-jointed (FJ), Dachsous (Ds), and Fat (Ft)?
a) All are Cadherins
b) Ft is a kinase, Fj and Ds are transmembrane proteins
c) Fj is a Golgi protein, Ds and Ft are cadherins
d) Ds and Fj are Cadherins, Ft is a transmembrane proteins
e) They are all nuclear proteins
c) Fj is a Golgi protein, Ds and Ft are cadherins
The figure above shows a close-up of an insect wing. What property of cells is clearly illustrated in the image?
Note:
- looks like small hairs, all tips point to the right
a) Apicobasal polarity
b) cell proliferation control
c) mRNA localization
d) Planar cell polarity
e) actin protrusions
d) Planar cell polarity
Which organism is commonly associated with the discovery of Green Fluorescent Protein (GFP)?
a) Drosophila
b) Jellyfish
c) E. coli
d) Arabidopsis
e) Zebrafish
b) Jellyfish
