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Exam 3 Quiz

44 Questions  I  By Jaffryf
Exam 3 quiz
This is to prpare for exam 3

  
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Question Excerpt

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1.  In a pulse-chase procedure, if the chase is longer, which statement below correctly describes the location of the radioactively labeled proteins in the cell?
A.
B.
C.
D.
2.  You incubate liposomes with a series of purified proteins nomrally found in the coats of cell transport vesicles. after adding one of them to the liposome mixture, budding of vesicles fromt he liposomes began. what does this mean?
A.
B.
C.
D.
E.
3.  What determines the sequence of sugar addition to glycoprteins traveling through the gogli complex?
A.
B.
C.
D.
4.  How and where is the asymmetry of the phospholipid bilayers initially established?
A.
B.
C.
D.
E.
5.  The building blocks of a nucleoside are _____
A.
B.
C.
D.
E.
6.  The __-carbon of the sugar of a nucleotide participates in the formation of the phosphodiester bond?
A.
B.
C.
D.
E.
7.  To what site does Sar1 bind after it binds to GTP?
A.
B.
C.
D.
8.  Which of the models below suggests that the Golgi cisternae are transient structures that form at the cis face of the stack by fusion of membranous carriers from the ER and ERGIC and that each cisterna travels through the Golgi complex from the cis to the trans end of the stack, changing in composition as it progresses?
A.
B.
C.
D.
E.
9.  In general, how are proteins targeted to specific destinations?
A.
B.
C.
D.
E.
10.  Why is the Er so well-suited and ideally constructed for its role as a port of entry for secretory proteins?
A.
B.
C.
D.
E.
11.  How are proteins normally resident in the ER retrieved when they escape the ER?
A.
B.
C.
D.
E.
12.  Which type of cytoskeletal element is characterized as a hollow, rigid cylindrical tube with walls coposed of tubulin subunits
A.
B.
C.
D.
13.  Which of the following is (are) made on free ribosomes?
A.
B.
C.
D.
E.
14.  Which molecule below is a GTP-binding protein that is requred for the release of a clatherin-coated vesicle from the membrane on which it was formed?
A.
B.
C.
D.
E.
15.  What endosome serves as a sorting station that directs different types of receptors and ligands along diferent pathways?
A.
B.
C.
D.
E.
16.  Which of the following are components of Chargaff's rules of bases?
A.
B.
C.
D.
E.
17.  Most vesicles budding from the Golgi body have a fuzzy, electron-dense coat on their ______ surface. The coat appears to be made of _______.
A.
B.
C.
D.
E.
18.  All of the following statements about cellular trafficking are true EXCEPT
A.
B.
C.
D.
19.  The heads of kinesin like proteins have farily closely related amino acid sequences but diverse tail sequences. what ist he explation for this seeming contradiction?
A.
B.
C.
D.
E.
20.  Avery, MacLead, and McCarty (1944) demonstrated that DNA was the molecule of heredity by treating heat killed Streptaccacus pneumonia A (smooth) strain with DNase, thereby preventing transfer of the transforming substance from the killed S straight to the live R (rough) straight when the two were mixed together and injected into mice. Another way that one could demonstrate transformation in bacteria would be to extract DNA from
A.
B.
C.
D.
21.  Which protein below is often a component of intermediate filaments?
A.
B.
C.
D.
E.
22.  A small subfamily of kinesines moves toward the minus end of a microtubules, while the rest move toward the plus end. when the neck and stalk of a minus-directed kinesin is joined to the head of ap lus-directed kinesin, in what direction will the hydrid motor protein travel along a microtubule?
A.
B.
C.
D.
E.
23.  The uptake (both specific and nonspecific) of fluid, dissolved solutes and suspended macromolecules is called ____
A.
B.
C.
D.
E.
24.  The vesicle is targeted to the appropriate compartment by
A.
B.
C.
D.
25.  What recognizes the signal sequence as it exits the ribosomes and of what is it made?
A.
B.
C.
D.
26.  Which coated vesicles move materials in a retrograde direction from the ERGIC and Golgi stack toward the ER?
A.
B.
C.
D.
27.  In addition to microtubule motor proteins ____ are also involved in vesicular transport.
A.
B.
C.
D.
E.
28.  The accumulation of misfolded proteins in the ER is a potentially lethal situation and thus causes the triggering of what process?
A.
B.
C.
D.
29.  Ring-shaped complexes in the centrosome contain ______ in combination with _____
A.
B.
C.
D.
E.
30.  The current model for the nucleation of microtubules is that a helical array of y-tubulin subunit forms an open, nng-shaped template on which the first row of alphabeta-tubulin dimers assembles. how does this model account for the polarity of microtubules?
A.
B.
C.
D.
31.  Which end of a microtubule is the slow growing end
A.
B.
C.
D.
E.
32.  What GTP-binding protein plays a regulatory role in the formation and disassembly of the COPII coat?
A.
B.
C.
D.
E.
33.  ____ refers to the fact that the sequence of one DNA strand specifies the sequence of the other strand in the double helix?
A.
B.
C.
D.
E.
34.  How do protein coats select the contents of vesicles they help to form?
A.
B.
C.
D.
E.
35.  What circumstantial evidence supports the proposed role of the Rabs-in recruiting cytosolic tethering proteins to specific membrane surfaces?
A.
B.
C.
D.
E.
36.  What is the supposed function of the small subfamily of kinesins that is incapable of movement
A.
B.
C.
D.
E.
37.  When microtubules grow out of a centrosome, which end is associated with the centrosome?
A.
B.
C.
D.
E.
38.  When the rate of loss of actin subunits from the pointed end of an actin filament is balanced by the rate of their addition to the barbed end, __________
A.
B.
C.
D.
39.  What led Avery, MacLead and McCarty to conclude that DNA was the transformation principle reported by Griffith and others?
A.
B.
C.
D.
E.
40.  Which type of cytoskeletal element is described as a solid, thinner structure, often organized into a branching network, and composed of actin subunits?
A.
B.
C.
D.
E.
41.  Kinesin movement along a microtubule is said to be ______ meaning that it can move long distances along an individual microtubule without falling off
A.
B.
C.
D.
E.
42.  Typically, receptors for hormones or growth factors are destroyed during endocytosis, leading to a reduction in the cell sensitivity to further stimulation by that particular hormone or growth factor. this is a mechanism by which cells regulate their ability to respond to extracellular messengers. what is it called?
A.
B.
C.
D.
E.
43.  Hich of the proteins below is (are) not made on the membrane-bound ribosomes of the RER?
A.
B.
C.
D.
E.
44.  Which of the following are pathways of vesicle trafficking through the cytoplasm that have been discovered?
A.
B.
C.
D.
E.
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