Question 1
2.5 out of 2.5 points
Which of the following drugs is toxic for our cells?
Selected Answer: All of the above.
Question 2
2.5 out of 2.5 points
Which of the following changes would you expect to increase the phase transition temperature of a
synthetic bilayer composed of phosphatidylserine?
Selected Answer: Incorporation of phospholipids with longer fatty acid chains.
Question 3
2.5 out of 2.5 points
Which of the following processes that happens inside a cell DOES NOT normally require consumption of
free energy by the cell?
Selected Answer: Diffusion of small molecules within the cell
Question 4
2.5 out of 2.5 points
Indicate true (T) and false (F) statements below regarding the primary cilia. Your answer would be a four-
letter string composed of letters T and F only, e.g. TFFF.
( ) Primary cilia are found on the surface of almost all cell types in our bodies.
( ) Primary cilia are motile.
( ) Primary cilia are made in interphase at basal bodies.
( ) Primary cilia are thought to function in sensing and responding to external signals.
Selected Answer: TFTT
Question 5
2.5 out of 2.5 points
While examining the crystal structure of a membrane protein, you find several phospholipid molecules
bound to the protein. You know that these lipids …
Selected Answer: All of the above.
Question 6
2.5 out of 2.5 points
Which of the following structures is exclusively found in eukaryotic cells?
Selected Answer: Lysosome
Question 7
2.5 out of 2.5 points
Transmembrane proteins …
Selected
are sometimes covalently attached to a fatty acid chain that inserts into
Answer:
the membrane.
, Question 8
2.5 out of 2.5 points
Which of the following proteins do you expect to be enriched near the plus end of microtubules?
Selected Answer: XMAP215
Question 9
0 out of 2.5 points
The pathogen Listeria monocytogenes can hijack the actin cytoskeleton in human cells and spread inside
the host. Indicate true (T) and false (F) statements below about this phenomenon. Your answer would
be a four-letter string composed of letters T and F only; e.g. TTFF.
( ) The movement can be reconstituted in vitro by placing the bacteria in a mixture of actin, formin,
gelsolin, and capping protein.
( ) Cofilin counteracts the movement by depolymerizing actin filaments.
( ) The actin filaments grow with their minus ends pointed toward the bacterium.
( ) The movement depends on myosin activity to transport the bacteria on the actin filaments.
Selected Answer: FTFT
Question 10
2.5 out of 2.5 points
Indicate whether each of the following structures is based on actin filaments (A), microtubules (M), or
intermediate filaments (I). Your answer would be a five-letter string composed of letters A, M, and I
only;
e.g. AAAMM.
( ) The cell cortex
( ) The mitotic spindle
( ) The nuclear lamina
( ) Cilia
( ) Filopodia
Selected Answer: AMIMA
Question 11
2.5 out of 2.5 points
Which of the following cytoskeletal filaments are abundant in an animal cell
nucleus?
Selected Answer: Intermediate filaments
Question 12 2.5 out of 2.5 points
The two monolayers of the plasma membrane in a human red blood cell …
Selected
have different overall electrical charges, with negatively charged phospholipids (e.g.
Answer:
phosphatidylserine) normally enriched in the inner monolayer.
Question 13
2.5 out of 2.5 points
Indicate if each of the following changes occurring during mitosis in a fibroblast is the result of the
reorganization of actin filaments (A), microtubules (M), or intermediate filaments (I). Your answer would
be a five-letter string composed of letters A, M, and I only; e.g. AIAAM.
( ) The cell rounds up.
2.5 out of 2.5 points
Which of the following drugs is toxic for our cells?
Selected Answer: All of the above.
Question 2
2.5 out of 2.5 points
Which of the following changes would you expect to increase the phase transition temperature of a
synthetic bilayer composed of phosphatidylserine?
Selected Answer: Incorporation of phospholipids with longer fatty acid chains.
Question 3
2.5 out of 2.5 points
Which of the following processes that happens inside a cell DOES NOT normally require consumption of
free energy by the cell?
Selected Answer: Diffusion of small molecules within the cell
Question 4
2.5 out of 2.5 points
Indicate true (T) and false (F) statements below regarding the primary cilia. Your answer would be a four-
letter string composed of letters T and F only, e.g. TFFF.
( ) Primary cilia are found on the surface of almost all cell types in our bodies.
( ) Primary cilia are motile.
( ) Primary cilia are made in interphase at basal bodies.
( ) Primary cilia are thought to function in sensing and responding to external signals.
Selected Answer: TFTT
Question 5
2.5 out of 2.5 points
While examining the crystal structure of a membrane protein, you find several phospholipid molecules
bound to the protein. You know that these lipids …
Selected Answer: All of the above.
Question 6
2.5 out of 2.5 points
Which of the following structures is exclusively found in eukaryotic cells?
Selected Answer: Lysosome
Question 7
2.5 out of 2.5 points
Transmembrane proteins …
Selected
are sometimes covalently attached to a fatty acid chain that inserts into
Answer:
the membrane.
, Question 8
2.5 out of 2.5 points
Which of the following proteins do you expect to be enriched near the plus end of microtubules?
Selected Answer: XMAP215
Question 9
0 out of 2.5 points
The pathogen Listeria monocytogenes can hijack the actin cytoskeleton in human cells and spread inside
the host. Indicate true (T) and false (F) statements below about this phenomenon. Your answer would
be a four-letter string composed of letters T and F only; e.g. TTFF.
( ) The movement can be reconstituted in vitro by placing the bacteria in a mixture of actin, formin,
gelsolin, and capping protein.
( ) Cofilin counteracts the movement by depolymerizing actin filaments.
( ) The actin filaments grow with their minus ends pointed toward the bacterium.
( ) The movement depends on myosin activity to transport the bacteria on the actin filaments.
Selected Answer: FTFT
Question 10
2.5 out of 2.5 points
Indicate whether each of the following structures is based on actin filaments (A), microtubules (M), or
intermediate filaments (I). Your answer would be a five-letter string composed of letters A, M, and I
only;
e.g. AAAMM.
( ) The cell cortex
( ) The mitotic spindle
( ) The nuclear lamina
( ) Cilia
( ) Filopodia
Selected Answer: AMIMA
Question 11
2.5 out of 2.5 points
Which of the following cytoskeletal filaments are abundant in an animal cell
nucleus?
Selected Answer: Intermediate filaments
Question 12 2.5 out of 2.5 points
The two monolayers of the plasma membrane in a human red blood cell …
Selected
have different overall electrical charges, with negatively charged phospholipids (e.g.
Answer:
phosphatidylserine) normally enriched in the inner monolayer.
Question 13
2.5 out of 2.5 points
Indicate if each of the following changes occurring during mitosis in a fibroblast is the result of the
reorganization of actin filaments (A), microtubules (M), or intermediate filaments (I). Your answer would
be a five-letter string composed of letters A, M, and I only; e.g. AIAAM.
( ) The cell rounds up.
