If a microscope has a resolving power of 2um (micrometers) itmeans:
a) Objects less than 2 um in size cannot be seen, areinvisible.
b) Objects further than 2 um apart look like one object.
c) Objects closer than 2 um apart, look like one object.
d) Objects greater than 2 um in size cannot be seen, areinvisible.
Which of the following is not associated with a prokaryoticcell?
a) Cell wall.
b) Cell membrane.
c) Nucleus.
d) Ribosome.
e) Photosynthetic membranes.
Which structure makes proteins in a prokaryotic cell?
a) Pili.
b) Flagella.
c) Capsule.
d) Nucleoid.
e) Ribosomes.
Which structure is “slimy†in texture and may protect aprokaryotic cell from destruction by our immune system?
a) Pili.
b) Flagella.
c) Capsule.
d) Nucleoid.
e) Mark e if none are correct.
Which statement is not true of prokaryotic and eukaryotic cellwalls?
a) They are both composed primarily of the carbohydratecellulose.
b) They are both external to the cell membrane.
c) Both are highly permeable to molecules, and not selectivelypermeable like the plasma
membrane.
d) Some bacterial cell walls are toxic, whereas plant cell wallsare not.
Which structure attaches the prokaryotic cell to other cells orsurfaces?
a) Pili.
b) Flagella.
c) Capsule.
d) Nucleoid.
Which structure is composed of the highly condensed, circular,prokaryotic chromosome?
a) Pili.
b) Flagella.
c) Capsule.
d) Nucleoid.
Which statement is not true of prokaryotes?
a) They are less complex than eukaryotic cells.
b) They lack a true nucleus.
c) In addition to the chromosome they often have additionalloops of DNA called plasmids.
d) Photosynthetic bacteria may have sheets of internal plasmamembranes.
e) They tend to be as large as eukaryotic cells, 100um is atypical size.
What structure must be present for a cell to be considered aeukaryote? a) Cell wall.
b) Cell membrane.
c) Nucleus.
d) Ribosome.
e) Photosynthetic membranes
If a cell is metabolically very active, requiring it to processand use a great deal of energy, which organelle would be abundantin the cytoplasm?
a) Nuclei.
b) Nucleoli.
c) Mitochondria.
d) Lysosomes.
e) Endoplasmic reticulum.
Which statement is not true?
a) Prokaryotic and eukaryotic ribosomes make proteins.
b) Prokaryotic ribosomes are larger than eukaryoticribosomes.
c) Eukaryotic ribosomes may be embedded in plasma membranescalled rough endoplasmic
reticulum.
d) Mark d if all statements are true.
Which of the following is not found within the nuclearenvelope?
a) Chromosomes.
b) DNA.
c) Nucleoli.
d) Mitochondria.
e) Nucleoplasm.
Which statement is not true of the cytoskeleton?
a) It can lend shape to an animal cell.
b) It is a stiff, rigid structure, like the bone in our ownskeleton.
c) The cytoskeleton loosely anchors some organelles within acell.
d) Fibers of the cytoskeleton act as a “highway†along whichsmall vesicles move from one part of
cell to another.
Which of the following lacks a double plasma membrane, i.e. twoseparate bilipid membranes?
a) Nuclear envelope.
b) Cell membrane.
c) Mitochondria.
d) Chloroplast.
e) Mark e if none of these has a double plasma membrane.
Which of the following is not found inside the cellmembrane?
a) Nucleus.
b) Flagella.
c) Golgi apparatus.
d) Vacuoles.
e) Cell wall.
Where would one not encounter ribosomes in a cell?
a) Embedded in the plasma membrane that forms the smoothendoplasmic reticulum.
b) Embedded in the plasma membrane that forms the roughendoplasmic reticulum.
c) Floating “free†in the cytoplasm.
The liver is an organ that functions to detoxify body fluids ofpoisonous chemicals (like ethyl alcohol). What organelle withinliver cells helps it to accomplish this function?
a) Nucleoli.
b) Lysosomes.
c) Golgi apparatus.
d) Smooth endoplasmic reticulum.
The cell walls of what type of organism contain the chemicalchitin.
a) Plants.
b) Animals.
c) Bacteria.
d) Fungi.
What organelle produces lysosomes?
a) Mitochondria.
b) Golgi apparatus.
c) Ribosomes.
d) Vacuoles.
What structure is a large vacuole that lends internal support toplant cells when hydrated?
a) Cell wall.
b) Nucleus.
c) Tonoplast.
d) Plasmodesmata.
Which statement is not true of plastids (chloroplasts,chromoplasts and leukoplasts)?
a) Chloroplasts carry out photosynthesis.
b) They have two plasma membranes, with the inner membrane beinghighly folded.
c) They are structurally similar to mitochondria.
d) Leukoplasts store starch.
e) Chromoplasts contain chlorophyll.
Which of the following is not associated with eukaryoticcells?
a) Nucleoli.
b) Plastids.
c) Plasmids.
d) Plasmodesmata.
e) Basal bodies.
Which paired items are structurally identical to oneanother?
a) Eukaryotic and prokaryotic ribosomes.
b) Centrioles and basal bodies.
c) Plastids and mitochondria.
d) Eukaryotic and prokaryotic flagella.
Which statement is not true?
a) Plant cells are eukaryotic.
b) Cholorplasts are typically found in the roots of plants.
c) Plasmodesmata allow plant cells to share cytoplasm with oneanother facilitating movement of
materials from one cell to another.
d) Endoplasmic reticula and golgi complexes work together in thesecretion of products from a cell.
Which structure is not found in plant cells?
a) Mitochondria.
b) Plastids.
c) Centrioles.
d) Golgi bodies.
e) Mark e if all are found in plant cells.
Which of the following is not found in animal cells?
a) Mitochondria.
b) Plastids.
c) Centrioles.
d) Golgi bodies.
e) Mark e if all are found in animal cells.
Which structure is found at the base of eukaryotic flagella andcilia and play a role in control of these structures?
a) Peroxisomes.
b) Plasmids.
c) Centrioles.
d) Basal bodies.
What statement is not true of cell fractionation?
a) Tissue is homogenized in a blender.
b) The homogenate is spun at high speed in a centrifuge to pullsuspended materials out of solution
to form a pellet.
c) The pellet is examined for its composition and thecharacteristics of the materials it contains.
d) Once centrifuged, there is nothing left in the supernatant toexamine.
e) Mark e if all statements are true of cell fractionation.
Which statement is not true?
a) Unicellular organisms can be eukaryotic or prokaryotic.
b) Tissues are composed of cells.
c) Organs are composed of tissues.
d) Organisms are composed of cells and cell products.
e) Mark e if all statements are true.
Which statement is not true of cells and cell size?
a) Large cells have a high surface area to volume ratio,compared to small cells.
b) Cells with highly folded cell membranes have a higher surfacearea to volume ratio than cells
without a folded cell membrane.
c) Being flat and thin increases the surface area to volumeratio.
d) Mark d if all statements are true.
