A cell with a predominance of free ribosomes is most likely...
producing primarily cytoplasmic proteins
the extracellular matrix is thought to participate in the regulation of animal cell behavior by communicating information from the outside to the inside of the cell via what?
integrins
what contains the 9+2 arrangement of microtubules, consisting of nine doublets of microtubules surrounding a pair of single microtubules
both flagella and motile cilia
where could a cell be from if it has: enzymes, DNA, ribosomes, plasma membrane, and mitochondria
nearly any eukaryotic organism
what structure is the site of the synthesis of proteins that may be exported from the cell?
rough ER
in a plant cell, DNA may be found in...
the nucleus, chloroplast, and mitochondria
which cell would be the best for studying lysosomes?
muscle cell
bacterial cell
phagocytic white blood cell
leaf cell of a plant
nerve cell
phagocytic white blood cell
if an individual has abnormal microtubules due to a hereditary condition in which organs or tissues would you expect dysfunction?
sperm, larynx, and trachea; cells and tissues that contain cilia or flagella
all of the following are part of a prokaryotic cell except
a cell wall
DNA
a plasma membrane
an endoplasmic reticulum
ribosomes
an endoplasmic reticulum
large numbers of ribosomes are present in cells that specialize in producing which of the following molecules?
proteins
nucleic acids
glycogen
lipids
celluose
proteins
which organelle or structure is absent in plant cells?
microtubules
centrosomes
peroxisomes
Golgi vesicles
mitochondria
cetrosomes
which organelle often takes up much of the volume of a plant cell?
lysosome
peroxisome
Golgi apparatus
vacuole
mitochondrion
vacuole
hydrolytic enzymes must be segregated and packaged to prevent general destruction of cellular components. which of the following organelles contains these hydrolytic enzymes in animal cells?
chloroplast
lysosome
peroxisome
glyoxysome
central vacuole
lysosome
which organelle is found in plant cells but not animal cells?
mitochondria
nuclei
plastids
ribosomes
none of these
plastids
ions can travel directly from the cytoplasm of one animal cell to the cytoplasm of an adjacent cell through...
gap junctions
thylakoids, DNA, and ribosomes are all components found in
mitochondria
nuclei
chloroplasts
vacuoles
lysosomes
chloroplasts
What two domains are prokaryotes classified as belonging to?
bacteria and archaea
which of the following is present in a prokaryotic cell
ribosome
mitochondrion
ER
chloroplast
nuclear envelope
ribosome
the evolution of eukaryotic cells most likely involved...
edosymbiosis of an aerobic bacterium in a larger host cell- the endosymbiont evolved into mitochondria
when a K+ ion moves from the soil into the vacuole of a cell on the surface of a root, it must pass through several cellular structures. What is the order in which the structures will be passed by the ion?
primary cell wall --> plasma membrane --> cytoplasm --> vacuole
which structure is common in plant and animal cells?
mitochondrion
centriole
chloroplast
wall made of cellulose
central vacuole
mitochondrion
movement of vesicles within the cell depends on what cellular structures?
microtubules and motor proteins
what is the most likely pathway taken by a newly synthesized protein that will be secreted by a cell?
ER --> Golgi --> vesicles that fuse with the plasma membrane
the fact that the outer membrane of the nuclear envelope has bound ribosomes allows one to most reasonably conclude that...
at least some of the proteins that function in the nuclear envelope are made by the ribosomes on the nuclear envelope
cyanide binds with at least one molecule involved in producing ATP. if a cell is exposed to cyanide, most of the cyanide would be found within the...
mitochondria
why isn't the mitochondrion classified as part of the endomembrane system?
its structure isn't derived from the ER or Golgi
plasmodesmatas in plant cells are most similar in function to which structure in animal cells?
gap junctions
peroxisomes
tight junction
extracellular matrix
desmosomes
gap junctions
what do cells require to form cilia or flagella?
actin
which organelle is the primary site of ATP synthesis in eukaryotic cells?
lysosome
peroxisome
vacuole
mitochondria
Golgi apparatus
mitochondria
which of the following contains hydrolytic enzymes?
mitochondrion
peroxisome
golgi apparatus
vacuole
lysosome
lysosome
in a liver cell detoxifying alcohol and some other poisons the enzymes of the peroxisome remove hydrogen from these molecules and...
transfer the hydrogen to oxygen molecules to generate hydrogen peroxide
what is a major cause for size limits in cells?
the need for surface area of sufficient area to support the cell's metabolic needs
which structure is not apart of the endomembrane system?
golgi apparatus
plasma membrane
chloroplast
ER
nuclear envelope
chloroplast
which type of organelle or structure is primarily involved in the synthesis of oils, phospholipids, and steroids?
contractile vacuole
lysosome
ribosome
smooth ER
mitochondrion
smooth ER