bio test 2
Card Set Information
bio test 2
lysosomes and centrioles are not found in what what kind of cells
plants cells have what that animal cells dont
central vacuole, chloroplasts, & rigid cell wall
Selective permeability is what
when the plasma membrane controls the movement of molecules into and out of cell
plasma membrane is made of
lipids, proteins, some carbohydrates, phospholipids
2 fatty acids
hydrophilic & hydrophobic
Phospholipids make up a two- layer sheet called
hydrophobic region faces out
allows cells to exist in watery environment
the nucleus has
complex proteins and DNA called chromatin( which makes up chromosomes)
the nuclear envelope is a double membrane that..
it is attached to a network of membranes called..
allows materials to flow in and out.
attached to endoplasmic reticulum.
ribosomes are involved in the cells..
ribosomes are attached to..
ER & associated with nuclear envelope
the endomembrane system includes
Golgi app., plasma membrane, vacuoles, lysosomes, end. reticulum
components of the endomembrane system communicate via
smooth ER lacks...
rough ER lines outer surface of..
lines the outer surface of membranes
enzymes made in the smooth ER are involved in the synthesis of...
lipids, oils, phospholipids, and steroids
rough ER makes more membrane for itself and proteins destined for secretion,,
once proteins are synthesised, they are transported in..
vesicles to other parts
ER sends product through ____ to golgi apparatus
A lysosome is a membrane sack containing..
digestive enzymes produced by the ER and sent to golgi app.
removes and recycles
damaged parts of a cell
are membraneous sacs that are found in many cells that...
perform a variety of functions: pigment, to expel water..
(conversion of glucose and lipids/ food to ATP) happens where
photosynthesising organelles of plants
what are the parts of a chloroplast?
thylakoids, grana, stroma
what 3 kinds of fibers make up the
microfilaments- shape and motility
intermediate- shape and anchor organelles
mictrotubules- shape & act as track for motor protein
cillia & flagella
are made of mictrotubules wrapped in plasma membrane..and move by
proteins called dynein arms
when cells synthesize they secret..
ECM -- composed of fibers of collagen
ECM attaches through proteins
What cell has a
( plant cells have junction called plasmodesmata to serve as cell communication)
cells communicate through
.- prevent leakage
- fasten cells together into sheets
- channels that allow molecules to flow between cells
phospholipids and proteins
make up what
/ fluid mosaic
(unsaturated fatty acids) have kinks because they prevent them from
packing tightly together, keeping them liquid
helps _____ keep liquid/ permeable wedged into the bilayer.
3 substances that move through lipid protein of membrane
2- carbon dioxide
3- only hydrophobic mole.
attach to the _________, and the membrane/ cytoskeleton because they
create stronger framework (they are proteins w/strength)
in the membrane have the purpose as
from the extra cell matrix involved)
nonpolar molecules ...
polar molecules ...
(carbon dioxide & oxygen)-
(glucose & sugars)-
do not cross easy
What spontaneously assembles into
(formation of a membrane was a critical step in evolution)
Movement from high to low concentrations
is when ___ energy is required
water from high to low
concentration of solute
on both sides
ability of a solution to cause a cell to lose/ gain water
Quantity of solute
dependent on the concentration of a non penetrating solute on both sides of membrane
higher concentration of solute
less solute, more water
concentration of solute higher outside cell
( more solute, less water)
membrane shriveled/ decreases
the mechanism for moving a solute
against its concentration gradient
alters shape of membrane protein
through phosphorylation using ATP.
happens in the ______ of the
and the ____________ in the
ATP (adenosine), triphosphate-- occur in these organs