primary - ANSWER Which of the following levels of protein structure is
LEAST likely to be affected by heat
the left - ANSWER On which end of this polypeptide would new amino acids
be added during polymerization?
proline - ANSWER Which of the following amino acids is the only one that
directly alters the structure of the polypeptide backbone?
polar uncharged - ANSWER To what class does the amino acid at right belong
more unsaturated lipids - ANSWER A species that has evolved to survive at
very low temperatures is likely to have.
H2CO3 - ANSWER Shown above is part of the chemical equilibrium of the
carbonate buffer system. If you had a solution at a pH such that Bicarbonate
(HCO3-) was essentially the only form present, what chemical species would
increase in concentration if you added an acid to it
cellulose, starch, glycogen - ANSWER what is a polymer of glucose?
Its sequence defines the genotype of an organism - ANSWER Which of the
following statements is true for DNA but not RNA?
A. It polymerizes 5' to 3'.
B. One of its monomers is ATP.
C. It forms base pairs through hydrogen bonding
D. Its sequence defines the genotype of an organism
3' - ANSWER Assuming that the molecule shown above was just added to an
existing polymer, to which carbon on the structure above is the next monomer
added during polymerization
peptidoglycan - ANSWER Which of the following is/are found in bacteria but
not eukaryotes?
,A peptidoglycan cell wall
B. mitochondria
C. supercoiled DNA
D. All of the above
all of the above - ANSWER Why is DNA double-stranded?
A. The bases are non-polar.
B. The phosphate groups are polar.
C. The bases hydrogen bond with each other.
D. All of the above
a nucleus - ANSWER Which of the following do eukaryotes have that bacteria
do not?
translation - ANSWER what function does this organelle take process in
golgi complex - ANSWER What organelle is primarily responsible for protein
glycosylation?
smooth ER - ANSWER What organelle is primarily responsible for storing
intracellular calcium (Ca++)?
High speed (with vesicles) - ANSWER If you used differential centrifugation
to separate organelles, at which speed would you pellet Golgi complex?
proteins - ANSWER The graph at right indicates radioactivity in
secretory vesicles (A), rough ER (B), and Golgi
complex (C). This radioactivity indicates the
location of
The radioactivity in secretory vesicles would eventually decrease - ANSWER
In what single, dramatic way would the appearance of this graph change if a
large amount of calcium (Ca++) were introduced into the cytoplasm?
It would prevent microtubules depolymerization - ANSWER What would
happen if you treated cells with a chemical form of GTP that cannot be
hydrolyzed into GDP?
, ATP - ANSWER Which of the following is required for actin polymerization?
D - ANSWER If you purified cytoskeletal proteins and subject them to SDS-
PAGE, which would migrate as a single band?
A. Tubulin
B. Actin
C. Keratin
D. B and C
E. All of the above
f- actin - ANSWER Which cytoskeletal structure(s) is/are polar
homomultimers?
They are amphipathic - ANSWER Which of the following explains why
phospholipids spontaneously form liposomes and are ideal for making cellular
membranes.
ionic bonds - ANSWER One of the most prominent effects of increased
metabolism (e.g. in exercise) is decreasing
pH. What types of interactions are most affected by decreases in pH?
more Gs and Cs in genome - ANSWER Double stranded DNA can literally
melt apart at high temperatures. What might prevent
this "melting" for organisms adapted to high temperatures?
exhibit hydrogen bonding between bases; have purines and pyrimidines. -
ANSWER DNA and RNA are similar in that both
D - ANSWER Which of the following amino acid R-groups would you predict
is most soluble in water?
A. -H
B. -CH3
C. -CH2OH
D. -CH2COOH
d - ANSWER Which of the following lists the bonds or forces in order from
strongest to weakest?
A. ionic, hydrogen, covalent, van der Waals
LEAST likely to be affected by heat
the left - ANSWER On which end of this polypeptide would new amino acids
be added during polymerization?
proline - ANSWER Which of the following amino acids is the only one that
directly alters the structure of the polypeptide backbone?
polar uncharged - ANSWER To what class does the amino acid at right belong
more unsaturated lipids - ANSWER A species that has evolved to survive at
very low temperatures is likely to have.
H2CO3 - ANSWER Shown above is part of the chemical equilibrium of the
carbonate buffer system. If you had a solution at a pH such that Bicarbonate
(HCO3-) was essentially the only form present, what chemical species would
increase in concentration if you added an acid to it
cellulose, starch, glycogen - ANSWER what is a polymer of glucose?
Its sequence defines the genotype of an organism - ANSWER Which of the
following statements is true for DNA but not RNA?
A. It polymerizes 5' to 3'.
B. One of its monomers is ATP.
C. It forms base pairs through hydrogen bonding
D. Its sequence defines the genotype of an organism
3' - ANSWER Assuming that the molecule shown above was just added to an
existing polymer, to which carbon on the structure above is the next monomer
added during polymerization
peptidoglycan - ANSWER Which of the following is/are found in bacteria but
not eukaryotes?
,A peptidoglycan cell wall
B. mitochondria
C. supercoiled DNA
D. All of the above
all of the above - ANSWER Why is DNA double-stranded?
A. The bases are non-polar.
B. The phosphate groups are polar.
C. The bases hydrogen bond with each other.
D. All of the above
a nucleus - ANSWER Which of the following do eukaryotes have that bacteria
do not?
translation - ANSWER what function does this organelle take process in
golgi complex - ANSWER What organelle is primarily responsible for protein
glycosylation?
smooth ER - ANSWER What organelle is primarily responsible for storing
intracellular calcium (Ca++)?
High speed (with vesicles) - ANSWER If you used differential centrifugation
to separate organelles, at which speed would you pellet Golgi complex?
proteins - ANSWER The graph at right indicates radioactivity in
secretory vesicles (A), rough ER (B), and Golgi
complex (C). This radioactivity indicates the
location of
The radioactivity in secretory vesicles would eventually decrease - ANSWER
In what single, dramatic way would the appearance of this graph change if a
large amount of calcium (Ca++) were introduced into the cytoplasm?
It would prevent microtubules depolymerization - ANSWER What would
happen if you treated cells with a chemical form of GTP that cannot be
hydrolyzed into GDP?
, ATP - ANSWER Which of the following is required for actin polymerization?
D - ANSWER If you purified cytoskeletal proteins and subject them to SDS-
PAGE, which would migrate as a single band?
A. Tubulin
B. Actin
C. Keratin
D. B and C
E. All of the above
f- actin - ANSWER Which cytoskeletal structure(s) is/are polar
homomultimers?
They are amphipathic - ANSWER Which of the following explains why
phospholipids spontaneously form liposomes and are ideal for making cellular
membranes.
ionic bonds - ANSWER One of the most prominent effects of increased
metabolism (e.g. in exercise) is decreasing
pH. What types of interactions are most affected by decreases in pH?
more Gs and Cs in genome - ANSWER Double stranded DNA can literally
melt apart at high temperatures. What might prevent
this "melting" for organisms adapted to high temperatures?
exhibit hydrogen bonding between bases; have purines and pyrimidines. -
ANSWER DNA and RNA are similar in that both
D - ANSWER Which of the following amino acid R-groups would you predict
is most soluble in water?
A. -H
B. -CH3
C. -CH2OH
D. -CH2COOH
d - ANSWER Which of the following lists the bonds or forces in order from
strongest to weakest?
A. ionic, hydrogen, covalent, van der Waals
