BIOL 204
BIOL 204 Athabasca U-Midterm Exam 2026
cell membrane (plasma membrane)
phospholipid bilayer that surrounds all cells and regulates what enters and leaves the
cell
eukaryote
A cell that contains a nucleus and membrane bound organelles
nucleoid
A non-membrane-bounded region in a prokaryotic cell where the DNA is concentrated.
nucleus
A part of the cell containing DNA and RNA and responsible for growth and reproduction
prokaryote
A unicellular organism that lacks a nucleus and membrane bound organelles
amyloplast
Unpigmented plasids that store starch grains, abundent in cells of stems, tubers, and
seeds
anchoring junction
mechanically attaches adjacent cells to each other or to the basement membrane
bacterial flagellum
A ropelike structure built from actin proteins that, through rotary movements, propels a
bacterium through fluid.
capsule
A sticky layer that surrounds the cell walls of some bacteria, protecting the cell surface
and sometimes helping to glue the cell to surfaces.
cell wall
A rigid layer of nonliving material that surrounds the cells of plants and some other
organisms.
centrosome
A structure in animal cells containing centrioles from which the spindle fibers develop.
BIOL 204
, BIOL 204
chloroplast
An organelle found in plant and algae cells where photosynthesis occurs
chromoplast
a colored plastid other than a chloroplast, typically containing a yellow or orange
pigment.
crista (pl. cristae)
the folds of the inner membrane of mitochondria. The site of the electron transport
chain
cytoskeleton
A network of fibers that holds the cell together, helps the cell to keep its shape, and aids
in movement
endoplasmic reticulum (rough or smooth)
extensive interconnected network of membranous channels called cisternae, some have
ribosomes covering it and others don't.
protein and lipid synthesis
extracellular matrix
The substance in which animal tissue cells are embedded, consisting of protein and
polysaccharides.
flagellum (pl. flagella)
Long, slender extension used for locomotion by some bacteria, protozoans, and sperm.
gap junction
A type of intercellular junction in animal cells, consisting of proteins surrounding a pore
that allows the passage of materials between cells.
Golgi complex
a cell organelle that helps make and package materials to be transported out of the cell
granum (pl. grana)
stack of chlorophyll-containing thylakoids in a chloroplast
intermediate filament
BIOL 204
BIOL 204 Athabasca U-Midterm Exam 2026
cell membrane (plasma membrane)
phospholipid bilayer that surrounds all cells and regulates what enters and leaves the
cell
eukaryote
A cell that contains a nucleus and membrane bound organelles
nucleoid
A non-membrane-bounded region in a prokaryotic cell where the DNA is concentrated.
nucleus
A part of the cell containing DNA and RNA and responsible for growth and reproduction
prokaryote
A unicellular organism that lacks a nucleus and membrane bound organelles
amyloplast
Unpigmented plasids that store starch grains, abundent in cells of stems, tubers, and
seeds
anchoring junction
mechanically attaches adjacent cells to each other or to the basement membrane
bacterial flagellum
A ropelike structure built from actin proteins that, through rotary movements, propels a
bacterium through fluid.
capsule
A sticky layer that surrounds the cell walls of some bacteria, protecting the cell surface
and sometimes helping to glue the cell to surfaces.
cell wall
A rigid layer of nonliving material that surrounds the cells of plants and some other
organisms.
centrosome
A structure in animal cells containing centrioles from which the spindle fibers develop.
BIOL 204
, BIOL 204
chloroplast
An organelle found in plant and algae cells where photosynthesis occurs
chromoplast
a colored plastid other than a chloroplast, typically containing a yellow or orange
pigment.
crista (pl. cristae)
the folds of the inner membrane of mitochondria. The site of the electron transport
chain
cytoskeleton
A network of fibers that holds the cell together, helps the cell to keep its shape, and aids
in movement
endoplasmic reticulum (rough or smooth)
extensive interconnected network of membranous channels called cisternae, some have
ribosomes covering it and others don't.
protein and lipid synthesis
extracellular matrix
The substance in which animal tissue cells are embedded, consisting of protein and
polysaccharides.
flagellum (pl. flagella)
Long, slender extension used for locomotion by some bacteria, protozoans, and sperm.
gap junction
A type of intercellular junction in animal cells, consisting of proteins surrounding a pore
that allows the passage of materials between cells.
Golgi complex
a cell organelle that helps make and package materials to be transported out of the cell
granum (pl. grana)
stack of chlorophyll-containing thylakoids in a chloroplast
intermediate filament
BIOL 204
