BIO 201-LECTURES 1-9 UB EXAM QUESTIONS AND ACCUARATE ANSWERS
2024/2025 | VERIFIED
primary - Which of the following levels of protein structure is LEAST likely to be affected by heat
the left - On which end of this polypeptide would new amino acids be added during
polymerization?
proline - Which of the following amino acids is the only one that directly alters the structure of
the polypeptide backbone?
polar uncharged - To what class does the amino acid at right belong
more unsaturated lipids - A species that has evolved to survive at very low temperatures is likely
to have.
H2CO3 - 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 - what is a polymer of glucose?
Its sequence defines the genotype of an organism - 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' - 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 - 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 - 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 - Which of the following do eukaryotes have that bacteria do not?
translation - what function does this organelle take process in
golgi complex - What organelle is primarily responsible for protein glycosylation?
smooth ER - What organelle is primarily responsible for storing intracellular calcium (Ca++)?
High speed (with vesicles) - If you used differential centrifugation to separate organelles, at which
speed would you pellet Golgi complex?
proteins - 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 - 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 - What would happen if you treated cells with a
chemical form of GTP that cannot be hydrolyzed into GDP?
ATP - Which of the following is required for actin polymerization?
D- 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 - Which cytoskeletal structure(s) is/are polar homomultimers?
They are amphipathic - Which of the following explains why phospholipids spontaneously form
liposomes and are ideal for making cellular membranes.
ionic bonds - 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 - Double stranded DNA can literally melt apart at high temperatures.
What might prevent
this "melting" for organisms adapted to high temperatures?
2024/2025 | VERIFIED
primary - Which of the following levels of protein structure is LEAST likely to be affected by heat
the left - On which end of this polypeptide would new amino acids be added during
polymerization?
proline - Which of the following amino acids is the only one that directly alters the structure of
the polypeptide backbone?
polar uncharged - To what class does the amino acid at right belong
more unsaturated lipids - A species that has evolved to survive at very low temperatures is likely
to have.
H2CO3 - 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 - what is a polymer of glucose?
Its sequence defines the genotype of an organism - 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' - 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 - 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 - 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 - Which of the following do eukaryotes have that bacteria do not?
translation - what function does this organelle take process in
golgi complex - What organelle is primarily responsible for protein glycosylation?
smooth ER - What organelle is primarily responsible for storing intracellular calcium (Ca++)?
High speed (with vesicles) - If you used differential centrifugation to separate organelles, at which
speed would you pellet Golgi complex?
proteins - 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 - 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 - What would happen if you treated cells with a
chemical form of GTP that cannot be hydrolyzed into GDP?
ATP - Which of the following is required for actin polymerization?
D- 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 - Which cytoskeletal structure(s) is/are polar homomultimers?
They are amphipathic - Which of the following explains why phospholipids spontaneously form
liposomes and are ideal for making cellular membranes.
ionic bonds - 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 - Double stranded DNA can literally melt apart at high temperatures.
What might prevent
this "melting" for organisms adapted to high temperatures?
