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AP Bio Unit 2 Exam Practice

Total questions: 68

Worksheet time: 1hrs 16mins

Name
Class
Date
1.

If a cells  Ψp\Psi p = 3 bars and its  Ψs\Psi s = -4.5 bars, what is the resulting  Ψ\Psi  ?

a)

-7.5

b)

7.5

c)

-1.5

d)

1.5

2.

The cell from question 1 is placed in a beaker of sugar water with Ψs\Psi s  = -4.0 bars.  In which direction will the net flow of water be?

a)

Out of the cell

b)

Into the cell

c)

Both into and out of the cell

d)

Neither into nor out of the cell

3.

The original cell from question 1 is pllaced in a beaker of sugar water with  Ψs\Psi s  = -0.15 MPa (megapascals).  We know that 1 MPa = 10 bars.  In which direction will the net flow of water be?

a)

Into the cell

b)

Out of the cell

c)

No net flow of water

4.

The value for  Ψ\Psi  in root tissue was found to be -3.3 bars.  If you take th root tissue and place it in a 0.1 M solutin of sucrose at 20 °\degree C in an open beaker, what is the  Ψ\Psi  of the solution, and in which direction would the net flow of water be?

a)

 Ψs\Psi s  = -3.3, net flow into the root

b)

 Ψs\Psi s  = 3.3, net flow out of the root (into the solution)

c)

 Ψs\Psi s  = -2.43, net flow into the root

d)

 Ψs\Psi s  = 2.43, net flow out of the root (into the solution)

5.

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\Psi  of the solution, and in which direction would the net flow of water be?

a)

-3.3 bars, net flow out of the root (into the solution)

b)

3.3 bars, net flow into the root

c)

-4.87 bars, net flow out of the root (into the solution)

d)

4.87 bars, net flow into the root

6.

A plant cell with a Ψs\Psi s  of -7.5 bars keeps a constant volume when immersed in an open-beaker solution that has a  Ψs\Psi s  of -4 bars.  What is the cells  Ψp\Psi p  ?

a)

-4

b)

-7.5

c)

-3.5

d)

3.5

7.

At 20 °\degree 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\Psi p  ? 

a)

2.4

b)

0.1

c)

-12.2

d)

-14.6

8.

At 20 °\degree C, a cell with  Ψp\Psi p  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?

a)

0.4

b)

-9.7

c)

-12.7

d)

0.5

9.

What is the Ψs\Psi s   of a 1.0M sugar solution at 22 °\degree C under standard atmospheric conditions?

a)

-24.5 bars

b)

24.5 bars

c)

-2.45

d)

2.45

10.

At 22 °\degree C, zucchini cores are measured and determined to have a sucrose concentration of 0.36M. What is the Ψs\Psi s   of these cells and in which direction will the net flow of water be?

a)

0.64 net flow of water out of the cell

b)

-0.36 net flow of water into the cell

c)

8.17 net flow of water out of the cell

d)

-8.83 net flow of water into the cell

11.

Which organelle acts like a cellular stomach and degrades things?

a)

Lysosome

b)

Mitochondria

c)

Vacuole

d)

Vesicle

12.

Which organelle makes ribosomes?

a)

Nucleus

b)

Nucleolus

c)

Vacuole

d)

Golgi Body

13.

Which organelle makes proteins?

a)

Ribosomes

b)

Lysosomes

c)

Centrioles

d)

Cell Membrane

14.

Which organelle looks like tiny hairs that sweep mucus or food particles around?

a)

Flagella

b)

Cilia

c)

Cytoskeleton

d)

Cytoplasm

15.

Which organelle aids in cell division?

a)

Mitochondria

b)

Vacuole

c)

Cytoskeleton

d)

Centrioles

16.

Which organelle acts like a transportation bubble - carrying things into, around, or out of a cell?

a)

Vesicle

b)

Mitochondria

c)

Chloroplast

d)

Ribosome

17.

Which organelle makes lipids and detoxifies toxins?

a)

Rough ER

b)

Ribosome

c)

Lysosome

d)

Smooth ER

18.
A cell in a hypotonic environment would:
a)
Bloat
b)
shrink
c)
Stay the same size
19.
A cell in a hypertonic environment would have more solutes...
a)
Outside
b)
Inside
20.

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?

a)

to release energy from ATP

b)

to deliver proteins to other locations in the cell

c)

to collect amino acids for use in protein synthesis

d)

to sent messages about cell requirements to the nucleus

21.
Which of the following is NOT a function of the endomembrane system?
a)
Compartmentalization (creates different areas in the cell which do different things)
b)
Detoxification
c)
Protein modification and transportation of proteins
d)
Creation of ATP (energy)
22.

What structures do all cells contain

a)

Chloroplast, Mitochondria, and Cell Membrane

b)

Vacuoles, Nucleus, and Mitochondria

c)

Cytoplasm, Cell Membrane, and Ribosomes

d)

Cell Membrane, Ribosomes, and Cell Wall

23.

Which of the following is FALSE?

a)

Both plants and fungi contain chloroplasts

b)

Bacteria, Plants, and Fungi have cell walls

c)

All cells contain ribosomes, cytoskeleton, and cytoplasm

d)

Only bacteria can contain capsules

24.
"Endosymbiosis" means
a)
Living together
b)
Living inside
c)
Entering together
d)
Joining together
25.
In this diagram, the endosymbiont is
a)
blue
b)
green
c)
purple
26.

Which of the following organelles most likely arose through endosymbiosis?

a)

Rough ER & Smooth ER

b)

Mitochondria & Flagellum

c)

Chloroplast & Mitochondria

d)

Chloroplast and Golgi apparatus

27.

Which of the following is NOT true about chloroplasts and mitochondria?

a)

They both have double membranes

b)

They both have their own DNA, separate from nuclear DNA

c)

They both have ribosomes

d)

They both have a nucleus

28.

Which of the following would require facilitated diffusion to enter or exit a cell? Select all that apply.

a)

Water molecules

b)

Ions (ex. Na+ and Cl-)

c)

Small, non charged molecules (ex. O2 and CO2)

29.

Which of the following statements is true?

a)

Water is transported actively against a concentration gradient.

b)

Water flows into the direction of the lowest water potential.

c)

Active transport is ATP-independent.

d)

Osmosis requires impermeable membranes.

30.
The soil surrounding the roots of a plant has a water potential of -15 bars. The leaves of the plant have a water potential of -18 bars.
What will happen?
a)
Water will leave the plant and the plant will wilt.
b)
Water will move from the roots to the leaves of the plant.
c)
Nothing - these solutions are isotonic.
d)
IDK - What is a bar????
31.
A saltwater fish is accidentally placed in a freshwater aquarium in a few short hours it sadly died. Which explains why this occurred?
a)
The cells of the fish body were dehydrated by the quick loss of water. 
b)
The cells of the fish quickly absorbed massive amounts of water and it ended up killing the fish.  
c)
The fish hated the new decor in the freshwater tank. 
d)
It was just its time. 
32.
Pure water has a water potential of ___.
a)
1
b)
0
c)
-1
d)
100
33.
A sucrose solution in a beaker has a solute potential of -4 bars.  A cell with a solute potential of -2 bars is placed in the beaker.  What will be the direction for the net movement of water?
a)
into the cell
b)
out of the cell
c)
there will be no net movement
34.
A sucrose solution in a beaker has a solute potential of -4 bars.  A cell with a solute potential of -2 bars is placed in the beaker.  What will be the direction for the net movement of water?
a)
into the cell
b)
out of the cell
c)
there will be no net movement
35.

Assume that the “cell” below is permeable to sucrose, glucose, and water but impermeable to starch. Which of the following statements is correct?

a)

(A) Starch will diffuse into the cell.

b)

(B) Starch will diffuse out of the cell.

c)

(C) There will be no net movement of glucose

d)

(D) Glucose will diffuse into the cell

e)

(E) Sucrose will diffuse into the cell

36.

Assume the “cell” is permeable to water only. If the cell contains a 0.3 M solution of glucose and the environment contians a 0.1 M solution of glucose, which of the following statements would be true?

a)

(A) The cell will decrease in volume.

b)

(B) Glucose will enter the “cell.”

c)

(C) Pinocytosis will occur.

d)

(D) There would be a net movement of water into the “cell.”

e)

(E) There would be no net movement of water.

37.

You place a piece of potato weighing 0.3 gram with a water potential of 1 MPa in a beaker of Pepsi. After 10 minutes, you remove the potato piece, and it now weighs 0.25 gram. You conclude that

a)

a). Pepsi Cola has a water potential greater than 1 MPa.

b)

b). Pepsi Cola has a water potential of 0 MPa.

c)

c). Pepsi Cola has a water potential less than 1 MPa.

d)

d). Pepsi Cola does not have turgor pressure, and so you cannot conclude anything about its water potential.

38.

An animal cell with a solute potential of -2.0 bar is placed into a solution with a solute potential of -1.5 bar. What is the net direction of water?

a)

a. Into the cell

b)

b. Out of the cell

c)

c. The cell is at equilibrium.

d)

d. Equal amounts of water move into and out of the cell.

39.
Carrot and potato cores were placed in various sucrose solutions for 24 hours and the % change in mass was recorded and graphed.  The temperature in the room was 24 degrees celcius.  Identify the approximate concentration of sucrose in the potato cells.
a)
0.13 M
b)
0.0 M
c)
0.4 M
d)
0.33 M
40.
Carrot and potato cores were placed in various sucrose solutions for 24 hours and the % change in mass was recorded and graphed.  The temperature in the room was 24 degrees celcius.  Sucrose is too large of a molecule to cross the membrane of potato and carrot cells.  Which molecule caused the change in mass?
a)
water
b)
sucrose
c)
salt
d)
glucose
41.
Carrot and potato cores were placed in various sucrose solutions for 24 hours and the % change in mass was recorded and graphed.  The temperature in the room was 24 degrees celcius.  Sucrose is too large of a molecule to cross the membrane of potato and carrot cells.  Calculate the water potential for the carrot cells.  The ionization constant for sucrose is 1.0 M.  The pressure potential is 0.
a)
-8.1 bars
b)
-8.1 M
c)
8.1 bars
d)
-3.5 bars
42.
A sucrose solution in a beaker has a solute potential of -4 bars.  A cell with a solute potential of -2 bars is placed in the beaker.  What will be the direction for the net movement of water?
a)
into the cell
b)
out of the cell
c)
there will be no net movement
43.
What is the approximate sucrose concentration in the potato core?
a)
.43 M
b)
.30 M
c)
0.0 M
d)
1.0 M
44.
If salt cannot permeate the membrane, which cell will lose the most water?
a)
A
b)
B
c)
C
45.
If salt cannot permeate the membrane, which cell will gain the most water?
a)
A
b)
B
c)
C
46.
1.  If the water potential of a cell is higher than the surrounding solution.  The water will ____.
a)
Move into the cell.
b)
Move equally in and out of the cell.
c)
Move out of the cell.
47.

The passive transport of an ion through a protein carrier into a cell represents which of the following?

a)

(A) facilitated diffusion

b)

(B) osmosis

c)

(C) exocytosis

d)

(D) phagocytosis

e)

(E) active transport

48.

Which of the following processes includes all the others?

a)

(A) osmosis

b)

(B) diffusion of a solute across a membrane

c)

(C) passive transport

d)

(D) transport of an ion down its electrochemical gradient

49.

Which of the following factors would tend to increase

membrane fluidity?

a)

(A) a greater proportion of unsaturated phospholipids

b)

(B) a greater proportion of saturated phospholipids

c)

(C) a lower temperature

d)

(D) a relatively high protein content in the membrane

50.

All of the following statements regarding membranes are correct EXCEPT

a)

(A) Polar heads of phospholipids are located on the periphery of the cell membrane.

b)

(B) Cell surface receptor proteins transfer small polar substances into the cell.

c)

(C) Peripheral proteins may display enzymatic functions.

d)

(D) Phospholipids are amphipathic.

e)

(E) Glycoproteins are involved in cell-to cell recognition.

51.

If a cell with a solute potential of - 0.2 MPa and a pressure potential of 0.4 MPa is placed in a chamber filled with pure water that is pressurized with 0.5 MPa, what will happen?

a)

A)Water will flow out of the cell.

b)

B)Water will flow into the cell.

c)

C)The cell will be crushed.

d)

D)The cell will explode.

52.

What is the correct classification of the extracellular solution when an animal cell is placed in distilled water?

a)

a. Hypotonic

b)

b. Hypertonic

c)

c. Isotoni

d)

d. Equilibrium

53.

The sodium-potassium pump is an important component of cellular membranes. Based on this illustration, which statement is correct?

a)

a. This is an example of facilitated transport.

b)

b. Sodium is pumped into the cell.

c)

c. This is an example of active transport.

d)

d. Potassium moves with its concentration gradient.

54.

Which of the following types of cell transport requires energy?

a)

A. The movement of a particle across a selectively permeable membrane down its concentration gradient

b)

B. The movement of a particle across a selectively permeable membrane against its concentration gradient

c)

C. The movement of water down its concentration gradient across selectively permeable membranes

d)

D. The movement of a sodium ion from an area of higher concentration to an area of lower concentration

e)

E. The movement of a particle across a selectively permeable membrane with the assistance of the membrane’s transport proteins

55.
Which of the following contains the highest water potential? 
a)
A
b)
B
c)
C
d)
D
56.
An organism lives in the Arctic waters.  A researcher examines the cell membrane.  Which of the following represents the membrane that would be found. 
a)
A
b)
B
c)
C
d)
D
57.
A protein that is destined for the membrane would be made 
a)
on a ribosome that is in the cytoplasm
b)
within a lysosome
c)
on a ribosome attached to the rough endoplasmic reticulum 
d)
within the Golgi body
58.
A protein that will be modified with carbohydrates will pass through 
a)
the lysosome and the rough ER
b)
the rough ER and the Golgi body
c)
the rough ER and smooth ER
d)
the Golgi body and the smooth ER
59.
Which of the following cells would have the highest surface area to volume ratio?
a)
1
b)
2
c)
3
d)
they are all the same
60.
Which of following correctly represents the packaging of a protein within a vesicle . 
a)
1
b)
2
c)
3
d)
4
61.
In the membrane section seen, which section would represent the non-polar section of a protein?
a)
A
b)
B
c)
C
d)
D
62.
A muscle cell receives the signal from insulin to absorb more glucose.  Choose the statement that best describes the rapid response 
a)
The cell starts making more Glucose transporter (GLUT) proteins at the ribosomes
b)
Smooth ER enzymes start building the glucose transporters
c)
Vesicles storing GLUT proteins within their membrane are transported to the membrane and fuse. 
d)
GLUT proteins floating in the cytoplasm are directed to the membrane by kinesin molecules
63.
A researcher uses fluorescently labeled amino acids to track the proteins being produced in a cell.  The cell being studied secretes antibodies.  She notices that the fluorescence is outside the nucleus.  What will she notice next?
a)
The fluorescence moves into the nucleus
b)
The fluorescence moves to the smooth ER
c)
The fluorescence moves to the Golgi body
d)
The fluorescence moves directly to the mombrane
64.
Researchers inserted pieces of membrane with aquaporins into frog eggs and placed the eggs into a hypotonic solution.  What did they observe?
a)
The aquaporins started to pump out water
b)
The eggs started to pump out Na+ to draw out water
c)
The eggs started to swell rapidly as water diffused inside
d)
The aquaporins started to pump in water
65.
The area where Na+ ions are actively transported would be 
a)
A
b)
B
c)
C
d)
D
66.
What area would have the lowest water potential?
a)
A
b)
B
c)
C
d)
D
67.
A receptor protein on a membrane is thought to be a crucial part of a signaling system in normal cells.  A disease is thought to be caused by a problem in this receptor.  The researchers examine the genes in patients who have the disease but there are no differences in the protein.  Which of the following is a valid hypothesis?
a)
Lysosomes digested the protein after it was made
b)
Smooth ER enzymes aren't working properly and the receptor protein isn't made properly
c)
The receptor is made by ribosomes but isn't transported to the membrane
d)
There are no working ribosomes in the cell
68.
Active transport is happening in 
a)
A
b)
B
c)
C
d)
D nowhere in this pricture

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