BMS 300 EXAM 1 CORRECTIONS
QUESTIONS AND ANSWERS
Integrins are transmembrane proteins that can bind to molecules called catenins
which are cytoplasmic proteins and to laminins, which are extracellular
proteins. You would expect to find these transmembrane proteins in:
a. desmosomes in epithelial cells
b. hemidesmosomes in epithelial cells
c. communicating junctions in connective tissue
d. occluding junctions in epithelia
e. a and b are correct - ANSWER b. hemidesmosomes in epithelial cells
A consensus sequence of bases that commonly includes TATA is:
a. at the 3' end of a gene
b. where DNA polymerase binds to initiate replication
c. where helicase binds to begin untwisting the DNA helix
d. where transcription factors bind to DNA to initiate gene transcription
e. a and d are correct - ANSWER e. a and d are correct
Connexons are clustered at gap junctions where they provide cytoplasmic
continuity between adjacent cells. Each connexon contains six connexins; each
connexin crosses the membrane four times. You would expect each of the
transmembrane segments of the protein to be composed entirely of:
, a. amphipathic phosphate head groups
b. alpha helices
c. beta-sheets
d. phospholipids
e. hydrophilic R groups - ANSWER b. alpha helices
Kinesin, dynein, and myosin are all:
a. plus end directed motors
b. tubulin binding proteins
c. actin binding proteins
d. ATPases
e. a and d are correct - ANSWER d. ATPases
Epithelial tissue is primarily made up of:
a. fibrocytes
b. extracellular proteins that have been secreted by widely dispersed cells.
c. chondrocytes
d. cells oriented on a basal lamina
e. all except a are correct - ANSWER d. cells oriented on a basal lamina
An experiment is done where the sequence of bases coding for the signal
peptide is added to an mRNA molecule that codes for kinesin. Which one of the
following is a correct expectation for the translated product of this mRNA?
QUESTIONS AND ANSWERS
Integrins are transmembrane proteins that can bind to molecules called catenins
which are cytoplasmic proteins and to laminins, which are extracellular
proteins. You would expect to find these transmembrane proteins in:
a. desmosomes in epithelial cells
b. hemidesmosomes in epithelial cells
c. communicating junctions in connective tissue
d. occluding junctions in epithelia
e. a and b are correct - ANSWER b. hemidesmosomes in epithelial cells
A consensus sequence of bases that commonly includes TATA is:
a. at the 3' end of a gene
b. where DNA polymerase binds to initiate replication
c. where helicase binds to begin untwisting the DNA helix
d. where transcription factors bind to DNA to initiate gene transcription
e. a and d are correct - ANSWER e. a and d are correct
Connexons are clustered at gap junctions where they provide cytoplasmic
continuity between adjacent cells. Each connexon contains six connexins; each
connexin crosses the membrane four times. You would expect each of the
transmembrane segments of the protein to be composed entirely of:
, a. amphipathic phosphate head groups
b. alpha helices
c. beta-sheets
d. phospholipids
e. hydrophilic R groups - ANSWER b. alpha helices
Kinesin, dynein, and myosin are all:
a. plus end directed motors
b. tubulin binding proteins
c. actin binding proteins
d. ATPases
e. a and d are correct - ANSWER d. ATPases
Epithelial tissue is primarily made up of:
a. fibrocytes
b. extracellular proteins that have been secreted by widely dispersed cells.
c. chondrocytes
d. cells oriented on a basal lamina
e. all except a are correct - ANSWER d. cells oriented on a basal lamina
An experiment is done where the sequence of bases coding for the signal
peptide is added to an mRNA molecule that codes for kinesin. Which one of the
following is a correct expectation for the translated product of this mRNA?
