AP Bio Practice Exam 1 Questions and
Answers16
Which of the following values is closest to the
chi-square value the scientist calculated? - ANSWERS -23.1
Which of the following research questions would best guide an investigation of the link between
the structure
of the signaling molecules and the evolution of quorum sensing? - ANSWERS -Did these species
evolve from a common ancestor that used a similar signaling molecule?
Carbon dioxide most likely enters a cell through
which of the following processes? - ANSWERS -Simple diffusion through the membrane
In pea seeds, yellow color (Y ) is dominant to
green color (y), and a round shape (R) is
dominant to a wrinkled shape (r). A dihybrid
cross between a true-breeding plant with yellow,
round seeds (YYRR) and a true-breeding plant
with green, wrinkled seeds (yyrr) results in an
F1 generation of plants with yellow, round
seeds. Crossing two F1 plants produces an F2
generation with approximately nine times as
many plants with yellow, round seeds as plants
with green, wrinkled seeds.
,Which of the following best explains these
results? - ANSWERS -The genes for seed color and seed shape
assort independently
Humans produce sweat as a cooling mechanism
to maintain a stable internal temperature. Which
of the following best explains how the properties
of water contribute to this physiological process? - ANSWERS -The high heat of vaporization of
water
allows the body to remove excess heat
through a phase change of water from
liquid to gas
A student placed a semipermeable membrane
inside a U-shaped channel with two chambers,
as shown. The membrane permits the movement
of water but not salt. The student wants to vary
the rate of osmosis that occurs across the
membrane. Which of the following
experimental designs will result in the fastest net
rate of water movement into chamber A? - ANSWERS -Placing salt water in chamber A and
distilled water in chamber B
Which of the following best describes the role of
water in photosynthesis? - ANSWERS -Water molecules donate electrons to the
electron transport chain
, What evolutionary advantage does
compartmentalization of core metabolic
processes offer eukaryotes? - ANSWERS -Evolution of a nucleus in eukaryotes
separates the processes of transcription
and translation and they can be regulated
separately
Which of the following best describes the
cellular location where pyruvate dehydrogenase
is most likely active? - ANSWERS -The mitochondrial matrix
The maximum production rate of acetyl-CoA
under condition 1 is closest to which of the
following? - ANSWERS -1 micromole/sec
Which of the following observations provides
the best evidence that acetyl-CoA negatively
regulates pyruvate dehydrogenase activity? - ANSWERS -The rate of the pyruvate
dehydrogenase-catalyzed reaction is
slower in the presence of a higher
concentration of acetyl-CoA
Pyruvate dehydrogenase deficiency is a genetic
disease most commonly linked to a mutation in
the a -subunit of the mitochondrial enzyme that
Answers16
Which of the following values is closest to the
chi-square value the scientist calculated? - ANSWERS -23.1
Which of the following research questions would best guide an investigation of the link between
the structure
of the signaling molecules and the evolution of quorum sensing? - ANSWERS -Did these species
evolve from a common ancestor that used a similar signaling molecule?
Carbon dioxide most likely enters a cell through
which of the following processes? - ANSWERS -Simple diffusion through the membrane
In pea seeds, yellow color (Y ) is dominant to
green color (y), and a round shape (R) is
dominant to a wrinkled shape (r). A dihybrid
cross between a true-breeding plant with yellow,
round seeds (YYRR) and a true-breeding plant
with green, wrinkled seeds (yyrr) results in an
F1 generation of plants with yellow, round
seeds. Crossing two F1 plants produces an F2
generation with approximately nine times as
many plants with yellow, round seeds as plants
with green, wrinkled seeds.
,Which of the following best explains these
results? - ANSWERS -The genes for seed color and seed shape
assort independently
Humans produce sweat as a cooling mechanism
to maintain a stable internal temperature. Which
of the following best explains how the properties
of water contribute to this physiological process? - ANSWERS -The high heat of vaporization of
water
allows the body to remove excess heat
through a phase change of water from
liquid to gas
A student placed a semipermeable membrane
inside a U-shaped channel with two chambers,
as shown. The membrane permits the movement
of water but not salt. The student wants to vary
the rate of osmosis that occurs across the
membrane. Which of the following
experimental designs will result in the fastest net
rate of water movement into chamber A? - ANSWERS -Placing salt water in chamber A and
distilled water in chamber B
Which of the following best describes the role of
water in photosynthesis? - ANSWERS -Water molecules donate electrons to the
electron transport chain
, What evolutionary advantage does
compartmentalization of core metabolic
processes offer eukaryotes? - ANSWERS -Evolution of a nucleus in eukaryotes
separates the processes of transcription
and translation and they can be regulated
separately
Which of the following best describes the
cellular location where pyruvate dehydrogenase
is most likely active? - ANSWERS -The mitochondrial matrix
The maximum production rate of acetyl-CoA
under condition 1 is closest to which of the
following? - ANSWERS -1 micromole/sec
Which of the following observations provides
the best evidence that acetyl-CoA negatively
regulates pyruvate dehydrogenase activity? - ANSWERS -The rate of the pyruvate
dehydrogenase-catalyzed reaction is
slower in the presence of a higher
concentration of acetyl-CoA
Pyruvate dehydrogenase deficiency is a genetic
disease most commonly linked to a mutation in
the a -subunit of the mitochondrial enzyme that
