BIOL 320- ch 4
when the size of a cell increases, the surface are/volume ratio
decreases
intermediate filaments are
different in different cell types
which of the following fundamental properties of life do viruses posses?
evolutionary adaptation
communication between adjacent animal cells is facilitated by
gap junctions
which of the following processes would be most likely to occur in the golgi complex?
glycosylation of proteins
a protein is destined to be secreted from a cell. in which organelle would you expect to find the protein just after it is produced in the rough endoplasmic reticulum?
golgi apparatus
if the surface area of a cell increases by a factor of 100, the volume of that cell will
increase by a factor of 1000
a(n) ______ is composed of tetrameric protofilaments
intermediate filament
which of the following diseases is caused by a peroxisomal defect?
Zellweger syndrome
lignin is an important component in
pant cell walls
which organelle has only a single membrane around it
peroxisome
glyoxysomes play an important role in the germination of fat-storing seeds and are considered to be specialized ______
peroxisomes
the size range of most plant and animal cells is
10-50 μm
prokaryotes have ______S ribosomes with ______S and ______S subunits, whereas eukaryotes have ______S ribosomes with ______S and ______S subunits
70, 50,30; 80,60,40
which of the following is included as part of the Eubacteria?
cyanobacteria
the term "junk DNA" is no longer used because these regions of DNA have been found to be associated with all of the following except
a) all of these b) binding sites for regulatory regions c) speciation d) none of these e) miRNAs all of these have been associated with "junk DNA"
which of the following would be attributed to a peroxisomal dysfunction?
accumulation of very long chain fatty acids
the methanobacteria, halobacteria, and sulfobacteria are included in which domain?
archaea
which of the following organelles is not generally found in animal cells?
central vacuole
which of the following is not true of a viroid?
its capsid is quite small
the smooth endoplasmic reticulum functions in synthesis of
lipids
which of the following diseases is caused by a prion?
mad cow disease
which of the following is not generally associated with a chloroplast?
matrix
which of the following is a eukaryotic characteristic?
membrane-bound nucleus
the major structural elements of the cytoskeleton are
microtubules, microfilaments, and intermediate filaments
which of the following is true of plant cells?
plant cells may contain chloroplasts
the chromoplast is an organelle associated with
plant pigment storage
Kuru is degenerative disease of the central nervous system believed to be cause by which type of agent?
prion
which of the following is least likely to be part of a cell membrane
proteoglycans
membrane proteins may function in
receiving extracellular signals
which of the following organelles is not part of the endomembrane system?
ribosome
which sequence reflects the locations that a secretory protein will visit on its way from its production to its secretion outside the cell?
rough ER, ER vesicle, Golgi complex, secretory vesicle
which of the following is not believed to be a virus or to be caused by a virus?
scrapie
the cytosol is best described as the
semifluid substance in which organelles are suspended
which of the following is true of a lysosome?
the lysosome may mature from a late endosome
with regard to tight junctions
they block the movement of basolateral integral membrane proteins to the apical surface
in which of the following properties are the Archaea more like eukaryotes than the bacteria?
translation initiation
mitochondrial DNA is/are
used to trace dispersal of modern humans
the hallmark feature of peroxisomal diseases is the presence of
very long chain fatty acids
viroids are characterized by all of the following except
well-characterized transmission