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Unit 2 Review Flashcards | StudBud
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Unit 2 Review
Unit 2 Review
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1
What is osmosis?
movement of water through a membrane from a low tohigh solute concentration
movement of solutes through membrane from a low to high water concentration
movement of water through membrane from a high to low solute concentration
movement of solutes through a membrane from high to low water concentration
2
Based on the graph below, what is the molar concentration of the carrot?
.6
0
.7
.8
3
A cell with a Ψs of -7.5 keeps a constant volume when in an open-beaker that has a Ψs of -4 bars. What is the cells ΨP?
0
3.5
1.5
-7.5
4
What type of transport requires hydrolysis of atp (energy)?
facilitated diffusion
secondary active transport
simple diffusion
primary active transport
5
What figure has the greatest surface area (height x width x number of sides x number of cubes)?
Figure B
Figure A
Figure C
All of these are the same.
6
The theory of the structure of the plasma membrane is described by the ____ model
electrochemical
fluid mosaic
unpermeable
sandwich
7
Brings macromolecules and particles into eukaryotic cells.Cell membrane folds around the particle and forms a vesicle
Lysosism
endocytosis
exocytosis
8
What does the diagram below represent?
Exocytosis
Phagocytosis
Pinocytosis
Endocytosis
9
Proteins in a membrane are:
integral if they are embedded in membrane & protrude from both surfaces
peripheral on the inside surface held in place by the cytoskeleton
integral if they protrude from only one surface
All of the choices are correct.
10
Salt concentration inside cell is 1.8 %. Concentration in surrounding medium becomes 5 %. What is the likely response?
The cell will shrink from loss of water
The cell will gain water from medium.
The cell will lose salt to the medium
Cell will remain the same.
11
Which of the following are membranous sacs that keep molecules separate from the cytoplasm?
Ribosome
Vesicle
Nucleoid
Nucleus
12
Newly discovered membrane channel protein accounts for why water can cross a membrane more quickly than expected is:
ATP synthetase
integrin
the sodium potassium pump
aquaporin
13
What type of solution was the red blood cell below placed for it to look like this?
Hypertonic
Isotonic
Hypotonic
14
What cellular organelle is responsible for receiving the mRNA and turning it into a protein?
nucleus
ribosomes
lysosome
Golgi body
15
All cells have these two characteristics
produce a cell wall outside of the plasma membrane
contain DNA in the nucleus and have a plasma membrane
contain mitochondria and chloroplasts
have a plasma membrane and ribosomes in the cytoplasm
16
What is the difference between passive diffusion and facilitated diffusion?
PD goes through the plasma membrane FD requires a channel protein
PD requires a channel protein to travel through FD does not
PD goes through the plasma memrbane FD requires energy
17
What area of the graph below represents the carrots placed in a hypertonic solution?
positive area (upper)
zero
None of these
Negative area (lower)
18
What figure has the greatest surface area: volume ratio?
All of these are the same.
Figure A
Figure C
Figure B
19
contain hydrolases , and are the site where macromolecules are hydrolyzed into monomers
gyloxisomes
lysosomes
peroxisomes
vesicles
20
The major functions of the plasma membrane include
recognition and communication between different cells and tissues
allowing the cell to survive in isolation
production of proteins used in construction of the cell wall
impermeable barrier to separate fluid environments inside out of the cell
21
20°C cell ΨP=3 is in equilibrium with .4Msolution of sucrose in an open beaker. What is the cell molarity of sucrose?
.5
-9.7
293
-12.7
22
What Figure has the greatest volume (height x width x length x number of cubes)?
All of these have the same volume.
Figure C
Figure B
Figure A
23
Whether a molecule can cross the plasma membrane depends upon
the chemical properties of the molecule
the shape of the molecule
All are correct
the charge of the molecule.
