CHAPTER 3: QUIZ ANSWERS
CHAPTER 3: QUIZ ANSWERS KIRSTIN BROWN
Chapter 3 quiz: ANSWERS 1. Which of the following would be least likely to diffuse through a cell membrane without the help of a transport protein? A.
A large polar molecule
B.
A large non-polar molecule
C.
A small polar molecule
D.
A small non-polar molecule
E.
A large ionic molecule
Chapter 3 quiz: ANSWERS 2. You are running an experiment in the lab to determine if your bacterial cells take up lactose using active transport, facilitated diffusion, or both. You add an ATP inhibitor to the culture and measure the ratio of lactose inside the cell vs. outside the cell over time. Based on the graph below, which type of transport is used by the cells? A.
ATP-dependent active transport
B.
Facilitated diffusion
C.
Both A and B
D.
None of the above
Chapter 3 quiz: ANSWERS 3. Which of the following graphs represents the transport of lactose by cells that use both facilitated diffusion and active transport for lactose? The inhibitor added is an ATP inhibitor.
A.
1
B.
2
C.
3
D.
None of these 1
2
3
Chapter 3 quiz: ANSWERS 4. Predict the permeability for the following molecules to cross the plasma membrane from highest to lowest. A.
B, C, E, D, A
B.
A, B, C, D, E
C.
A, E, D, B, C
D.
C, A, E, B, D
A
C
B
D
E
Na+
Chapter 3 quiz: ANSWERS 5. What is the difference between passive diffusion (PD) and facilitated diffusion (FD)? i.
PD uses transport proteins and FD does not
ii.
FD uses transport proteins and PD does not
iii.
PD transports against the concentration gradient and FD transports with it
iv.
PD transports with the concentration gradient and FD transports against it
v.
PD does not require energy and FD does
A.
v
B.
ii, iv
C.
ii, iii, v
D.
ii
E.
iii, v
Chapter 3 quiz: ANSWERS 6. If a cell was mutated so that it was suddenly only able to produce saturated fatty acids, how would you expect the fluidity of the cell membrane to change? A.
Increased permeability
B.
The membrane would be leaky
C.
Decreased fluidity
D.
Less transport proteins
E.
The membrane could not generate an electrochemical gradient
Chapter 3 quiz: ANSWERS 7. The formation of the phospholipid bilayer has an overall:
A.
Positive delta G
B.
Negative delta G
C.
No change in delta G
D.
Change in chemical composition
E.
Loss of water molecules
Chapter 3 quiz: ANSWERS 8. Which of the following is not a component of the cell membrane? A.
Protein
B.
Phospholipids
C.
Glycoproteins
D.
Cholesterol
E.
None of the above
Chapter 3 quiz: ANSWERS 9. Which part of the integral membrane protein shown below would be composed of hydrophobic amino acids?
A B C
A.
A
B.
B
C.
C
D.
A and C
E.
None of these
Chapter 3 quiz: ANSWERS 10. A cell has mutated so that it produces excess cholesterol in its cell membranes. Which of the following would you expect to see? i.
Decreased fluidity at low temperature
ii.
Increased fluidity at low temperature
iii.
Decreased fluidity at high temperature
iv.
Increased fluidity at high temperature
v.
No change in fluidity
A.
i, iv
B.
ii, iii
C.
i
D.
iii
E.
v
Chapter 3 quiz: ANSWERS 1. Which of the following would be least likely to diffuse through a cell membrane without the help of a transport protein? A.
A large polar molecule
B.
A large non-polar molecule
C.
A small polar molecule
D.
A small non-polar molecule
E.
A large ionic molecule
Chapter 3 quiz: ANSWERS 2. You are running an experiment in the lab to determine if your bacterial cells take up lactose using active transport, facilitated diffusion, or both. You add an ATP inhibitor to the culture and measure the ratio of lactose inside the cell vs. outside the cell over time. Based on the graph below, which type of transport is used by the cells? A.
ATP-dependent active transport
B.
Facilitated diffusion
C.
Both A and B
D.
None of the above
Chapter 3 quiz: ANSWERS 3. Which of the following graphs represents the transport of lactose by cells that use both facilitated diffusion and active transport for lactose? The inhibitor added is an ATP inhibitor.
A.
1
B.
2
C.
3
D.
None of these 1
2
3
Chapter 3 quiz: ANSWERS 4. Predict the permeability for the following molecules to cross the plasma membrane from highest to lowest. A.
B, C, E, D, A
B.
A, B, C, D, E
C.
A, E, D, B, C
D.
C, A, E, B, D
A
C
B
D
E
Na+
Chapter 3 quiz: ANSWERS 5. What is the difference between passive diffusion (PD) and facilitated diffusion (FD)? i.
PD uses transport proteins and FD does not
ii.
FD uses transport proteins and PD does not
iii.
PD transports against the concentration gradient and FD transports with it
iv.
PD transports with the concentration gradient and FD transports against it
v.
PD does not require energy and FD does
A.
v
B.
ii, iv
C.
ii, iii, v
D.
ii
E.
iii, v
Chapter 3 quiz: ANSWERS 6. If a cell was mutated so that it was suddenly only able to produce saturated fatty acids, how would you expect the fluidity of the cell membrane to change? A.
Increased permeability
B.
The membrane would be leaky
C.
Decreased fluidity
D.
Less transport proteins
E.
The membrane could not generate an electrochemical gradient
Chapter 3 quiz: ANSWERS 7. The formation of the phospholipid bilayer has an overall:
A.
Positive delta G
B.
Negative delta G
C.
No change in delta G
D.
Change in chemical composition
E.
Loss of water molecules
Chapter 3 quiz: ANSWERS 8. Which of the following is not a component of the cell membrane? A.
Protein
B.
Phospholipids
C.
Glycoproteins
D.
Cholesterol
E.
None of the above
Chapter 3 quiz: ANSWERS 9. Which part of the integral membrane protein shown below would be composed of hydrophobic amino acids?
A B C
A.
A
B.
B
C.
C
D.
A and C
E.
None of these
Chapter 3 quiz: ANSWERS 10. A cell has mutated so that it produces excess cholesterol in its cell membranes. Which of the following would you expect to see? i.
Decreased fluidity at low temperature
ii.
Increased fluidity at low temperature
iii.
Decreased fluidity at high temperature
iv.
Increased fluidity at high temperature
v.
No change in fluidity
A.
i, iv
B.
ii, iii
C.
i
D.
iii
E.
v
