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WorksheetsAP Bio-Unit 2 Review
Total questions: 60
Worksheet time: 52mins
One of the key innovations in the evolution of eukaryotes from a prokaryotic ancestor is the endomembrane system. What eukaryotic organelles or features might have evolved as a part of, or as an elaboration of, the endomembrane system?
ribosomes
chloroplasts
mitochondria
nuclear membrane
A cross section of part of a Golgi complex is shown. Part of the membrane of the Golgi complex pinches off and moves away. Which of the following is a function of this process?
to release energy from ATP
to deliver proteins to other locations in the cell
to collect amino acids for use in protein synthesis
to sent messages about cell requirements to the nucleus
Trichondia is a eukaryotic organism that attaches itself to fish and eats bacteria. Which of the following distinguishes Trichodina from all prokaryotes?
Trichodina is unicellular
Trichodina has a nucleus
Trichodina has cytoplasm
Trichodina is heterotrophic
Keratin is a protein found in hair. Where in a cell is keratin made?
nucleus
vacuole
ribosomes
mitochondria
Which of the following statements is consistent with the structure of the cell shown?
It is an epithelial cell
It is a mature red blood cell
It requires high levels of oxygen
It converts carbon dioxide into glucose
Tay-Sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very large and complex lipids. Which cellular organelle must be involved in this condition?
the endoplasmic reticulum
the Golgi apparatus
the lysosome
membrane-bound ribosomes
Liver cells are specialized cells that carry out a multitude of tasks, including the synthesis of cholesterol and the breakdown of protein metabolites. These cells would be expected to contain a large proportion of which organelle relative to all others?
smooth ER
rough ER
golgi
nucleolus
Five dialysis bags, constructed from a semipermeable membrane that is impermeable to sucrose, were filled with various concentrations of sucrose and then placed in separate beakers containing an initial concentration of 0.6 M sucrose solution. At 10-minute intervals, the bags were massed (weighed) and the percent change in mass of each bag was graphed.Which line in the graph represents the bag with the highest initial concentration of sucrose?
A
B
D
E
Diffusion with the help of transport proteins is called
phagocytosis
Na-K Pump
Facilitated Diffusion
Active Transport
Enables cell to engulf bulk quantities of specific large molecules is called
pinocytosis
phagocytosis
receptor-mediated endocytosis
exocytosis
Movement of molecules "up" or "against" the concentration gradient (meaning low to high) is called
passive transport
active transport
diffusion
facilitated diffusion
Movement of any particle "down" or "with" the concentration gradient is called
diffusion
endocytosis
exocytosis
active transport
Type of transport that requires ATP is called
passive transport
active transport
Fusion of membrane-bound vesicle with membrane and dumping contents outside cell is known as
endocytosis
diffusion
osmosis
exocytosis
How does oxygen and carbon dioxide enter and leave the cells?
osmosis
facilitated diffusion
active transport
diffusion
Diffusion of water across a semi-permeable membrane is known as
diffusion
osmosis
active transport
endocytosis
What happens to a cell when exposed to a hypertonic solution?
shrivels
swells
stays the same
What happens to a cell in an isotonic solution?
shrivels
swells
stays the same
What happens to a single-celled organism placed in a drop of pure water?
shrivels
swells
stays the same
Plant cells are happy when they are turgid, which solution would maintain a plant's turgidity?
hypotonic solution
hypertonic solution
isotonic solution
Which type of solution would cause a plant cell to be flaccid, not plasmolyze, but flaccid?
hypotonic
hypertonic
isotonic
When given an IV of fluid, why are humans given a salt solution of 0.7M?
It is hypertonic to your own cells
It is hypotonic to your own cells
It is isotonic to your own cells
Animal cells prefer ____ solutions and plant cells prefer _______ solutions for homeostasis.
hypertonic, hypotonic
hypotonic, hypertonic
isotonic, hypotonic
isotonic, hypertonic
When organisms maintain a stable internal environment it is known as
homeostasis
differentiation
maintenance
transformation
The main component of cell membranes are
proteins
phospholipids
cholesterol
carbohydrate tags
Cell theory states that...
cells are the basic building block of life
cells are cool
cells are microscopic
cells cannot be destroyed
Cell theory also states that...
bacteria are eukaryotic cells
animals are prokaryotic cells
cells come from other cells (cell division or splitting apart)
cells are awesome!
Lastly cell theory states....
cells don't do much
cells are microscopic
all living things are made up of cells (either unicellular or multicellular)
bacteria aren't cells
All of the following are evidence of endosymbiosis EXCEPT
mitochondria and chloroplast ribosomes are similar to bacterial ribosomes
mitochondria and chloroplast are similar in size to bacteria
mitochondria and chloroplast have double membranes
mitochondria and chloroplast have a nucleus
If a cells Ψp = 3 bars and its Ψs = -4.5 bars, what is the resulting Ψ ?
-7.5
7.5
-1.5
1.5
The cell from question 1 is placed in a beaker of sugar water with Ψs = -4.0 bars. In which direction will the net flow of water be?
Out of the cell
Into the cell
Both into and out of the cell
Neither into nor out of the cell
The original cell from question 1 is pllaced in a beaker of sugar water with Ψs = -0.15 MPa (megapascals). We know that 1 MPa = 10 bars. In which direction will the net flow of water be?
Into the cell
Out of the cell
No net flow of water
NaCl dissociates into 2 particles in water: Na+ and Cl-. If the solution in question 4 contained 0.1M NaCl instead of 0.1M sucrose, what is the Ψ of the solution, and in which direction would the net flow of water be?
-3.3 bars, net flow out of the root (into the solution)
3.3 bars, net flow into the root
-4.87 bars, net flow out of the root (into the solution)
4.87 bars, net flow into the root
A plant cell with a Ψs of -7.5 bars keeps a constant volume when immersed in an open-beaker solution that has a Ψs of -4 bars. What is the cells Ψp ?
-4
-7.5
-3.5
3.5
At 20 ° C, a cell containing 0.6M glucose is in equilibrium with its surrounding solution containing 0.5M glucose in an open container. What is the cell's Ψp ?
2.4
0.1
-12.2
-14.6
At 20 ° C, a cell with Ψp of 3 bars is in equilibrium with the surrounding 0.4M solution of sucrose in an open beaker. What is the molar concentration of sucrose in the cell?
0.4
-9.7
-12.7
0.5
What is the Ψs of a 1.0M sugar solution at 22 ° C under standard atmospheric conditions?
-24.5 bars
24.5 bars
-2.45
2.45
At 22 ° C, zucchini cores are measured and determined to have a sucrose concentration of 0.36M. What is the Ψs of these cells and in which direction will the net flow of water be?
0.64 net flow of water out of the cell
-0.36 net flow of water into the cell
8.17 net flow of water out of the cell
-8.83 net flow of water into the cell
Water potential is the sum of opposing forces of
Osmotic pressure and diffusion pressure deficit
Solute potential and osmotic potential
Solute potential and pressure potential
Diffusion pressure deficit and turgor pressure
