BIOL 204 Athabasca U- Midterm Questions And
Answers Verified 100% Correct
cell signalling - ANSWER -Processes that lead to communication and
coordination between cells. Hormones binding to their receptors on the cell surface
membrane are an example.
channel protein - ANSWER -a protein that allows the transport of specific
substances across a cell membrane
cholesterol - ANSWER -A lipid that forms an essential component of animal cell
membranes and acts as a precursor molecule for the synthesis of other biologically
important steroids.
endocytosis - ANSWER -process by which a cell takes material into the cell by
infolding of the cell membrane
exocytosis - ANSWER -a process by which the contents of a cell vacuole are
released to the exterior through fusion of the vacuole membrane with the cell
membrane.
facilitated diffusion - ANSWER -Movement of specific molecules across cell
membranes through protein channels
fluid mosaic model - ANSWER -model that describes the arrangement and
movement of the molecules that make up a cell membrane
gated channel - ANSWER -A protein channel in a cell membrane that opens or
closes in response to a particular stimulus.
integral membrane protein - ANSWER -A protein embedded in the lipid bilayer
of a cell. These are typicallly cell surface receptors, channels, or pumps.
osmosis - ANSWER -diffusion of water across a selectively permeable membrane
from an area of high concentration to low.
peripheral membrane protein - ANSWER -A protein that is associated with the
plasma membrane of a cell, but that is not embedded in the lipid bilayer. Peripheral
, proteins typically associate with embedded proteins through hydrogen bonding or
electrostatic interactions.
phospholipid - ANSWER -A molecule that is a constituent of the inner bilayer of
biological membranes, having a polar, hydrophilic head and a nonpolar,
hydrophobic tail.
pinocytosis - ANSWER -A type of endocytosis in which the cell ingests
extracellular fluid and its dissolved solutes.
primary active transport - ANSWER -Active transport that relies directly on the
hydrolysis of ATP.
receptor mediated endocytosis - ANSWER -The uptake of specific molecules
based on a cell's receptor proteins
secondary active transport - ANSWER -Form of active transport which does not
use ATP as an energy source; rather, transport is coupled to ion diffusion down a
concentration gradient established by primary active transport.
anabolic pathway - ANSWER -A metabolic pathway that consumes energy to
synthesize a complex molecule from simpler compounds.
energy is required
photosynthesis.
ATP (adenosine triphosphate) - ANSWER -main energy source that cells use for
most of their work
catabolic pathway - ANSWER -A metabolic pathway that releases energy by
breaking down complex molecules to simpler compounds.
energy is released
cellular respiration
endergonic - ANSWER -non-spontanious process
free energy of a product os more free than free energy of reactants.
Answers Verified 100% Correct
cell signalling - ANSWER -Processes that lead to communication and
coordination between cells. Hormones binding to their receptors on the cell surface
membrane are an example.
channel protein - ANSWER -a protein that allows the transport of specific
substances across a cell membrane
cholesterol - ANSWER -A lipid that forms an essential component of animal cell
membranes and acts as a precursor molecule for the synthesis of other biologically
important steroids.
endocytosis - ANSWER -process by which a cell takes material into the cell by
infolding of the cell membrane
exocytosis - ANSWER -a process by which the contents of a cell vacuole are
released to the exterior through fusion of the vacuole membrane with the cell
membrane.
facilitated diffusion - ANSWER -Movement of specific molecules across cell
membranes through protein channels
fluid mosaic model - ANSWER -model that describes the arrangement and
movement of the molecules that make up a cell membrane
gated channel - ANSWER -A protein channel in a cell membrane that opens or
closes in response to a particular stimulus.
integral membrane protein - ANSWER -A protein embedded in the lipid bilayer
of a cell. These are typicallly cell surface receptors, channels, or pumps.
osmosis - ANSWER -diffusion of water across a selectively permeable membrane
from an area of high concentration to low.
peripheral membrane protein - ANSWER -A protein that is associated with the
plasma membrane of a cell, but that is not embedded in the lipid bilayer. Peripheral
, proteins typically associate with embedded proteins through hydrogen bonding or
electrostatic interactions.
phospholipid - ANSWER -A molecule that is a constituent of the inner bilayer of
biological membranes, having a polar, hydrophilic head and a nonpolar,
hydrophobic tail.
pinocytosis - ANSWER -A type of endocytosis in which the cell ingests
extracellular fluid and its dissolved solutes.
primary active transport - ANSWER -Active transport that relies directly on the
hydrolysis of ATP.
receptor mediated endocytosis - ANSWER -The uptake of specific molecules
based on a cell's receptor proteins
secondary active transport - ANSWER -Form of active transport which does not
use ATP as an energy source; rather, transport is coupled to ion diffusion down a
concentration gradient established by primary active transport.
anabolic pathway - ANSWER -A metabolic pathway that consumes energy to
synthesize a complex molecule from simpler compounds.
energy is required
photosynthesis.
ATP (adenosine triphosphate) - ANSWER -main energy source that cells use for
most of their work
catabolic pathway - ANSWER -A metabolic pathway that releases energy by
breaking down complex molecules to simpler compounds.
energy is released
cellular respiration
endergonic - ANSWER -non-spontanious process
free energy of a product os more free than free energy of reactants.
