Thinking like
a Scientist
Biochemistry
Cells
Genetics
Evolution
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Start slideshow to start game.
What is the best definition of a
scientific theory?
A. An explanation of how and why a
natural phenomenon behaves the way
it does
B. A description of an invariable
relationship that exists in nature
C. A speculation or guess about how
nature works
D. An unproven fact
A scientist studies the effects that
barnyard grass, a weed, has on the
growth of rice, others weeds, and insects.
The barnyard grass and other weeds, rice
and insects make up which level of
biological organization?
A.
B.
C.
D.
population
community
ecosystem
biome
Scientists collected data on the
height and weight of individuals in
a population. They recorded their
results in a scatterplot. What is the
most accurate conclusion
regarding the relationship
between height and weight?
A. Tall individuals are always heavier than short
individuals
B. There is no relationship between height and weight
C. There is a positive relationship between height and
weight
D. There is a negative relationship between height and
weight
A student wants to determine whether temperature
affects the rate at which mold grows on bread. The
student closes the lid, and places the Petri dish in the
refrigerator. Which treatment would be the best
comparison for this experiment?
A. Placing another piece of bread in an open Petri dish
in the same refrigerator
B. Placing another piece of bread in a closed Petri dish
on the countertop
C. Placing another piece of bread in an open Petri dish
on the countertop
D. Placing another piece of bread in a closed Petri dish
in the same refrigerator
Two students grow 2 distinct strains of E. coli bacteria.
In Experiment 1, they use a new culture of Strain X
and a 30-day old culture of Strain Y. IN Experiment 2,
they use a new culture of Strain Y and a 30-day old
culture of Stain X. They measure the number of
bacterial colonies and record the data in these graphs.
What is the most accurate conclusion?
A. Strain X grows faster than Strain Y regardless of
the culture’s age
B. Strain Y grows faster then Strain X regardless of the
culture’s age
C. The new culture grows faster regardless of the
strain.
D. The 30-day old culture grows faster regardless of
the strain.
What key factor distinguishes organic
compounds from inorganic compounds?
A. Organic compounds contain
hydrogen
B. Organic compounds provide energy
for cells
C. Organic compounds contain carbon
D. Organic compounds are the building
blocks of cells
Which solution has the
greatest concentration of
hydroxide ions (OH )?
A.
B.
C.
D.
Urine (pH 6.0)
Rainwater (pH 5.5)
Tomato juice (pH 4.0)
Gastric juice (pH 2.0)
How do enzymes speed up
chemical reactions?
A. By increasing activation energy
B. By increasing energy produced
by the reaction
C. By reducing energy produced
by the reaction
D. By reducing activation energy
A scientist places a cell in a solution, and
over time the cell gains mass and swells.
What is the most likely explanation for the
cell’s gain in mass.
A. The solution and the cell have equal
concentrations of water.
B. The solution and the cell have equal
concentrations of solutes.
C. The solution is hypotonic to the cell.
D. The solution is hypertonic to the cell.
When the pH in a stomach
increases from 2 to 4, how does the
hydrogen ion concentration
change?
A.
B.
C.
D.
It increases by a factor of 100.
It increases by a factor of 2.
It decreases by a factor of 100.
It decreases by a factor of 2.
The hydrolysis of which
molecule provides energy for
muscle contraction?
A.
B.
C.
D.
Glucose
Lactic Acid
Oxygen
ATP
Megan examines a liver cell and observes an
organelle with many smooth-sided channels.
Which activity would identify this organelle as
the Golgi apparatus?
A. Digestion of macromolecules and old
organelles
B. Processing and packaging of cellular
materials prior to export
C. Harvesting of energy from organic molecules
to make ATP
D. Detoxification of poisonous molecules within
the cell
Naomi adds cycloheximide to cells grown
in a test tube. Within minutes, she
identifies short incomplete segments of
proteins in the cells On which organelle
does cycloheximide act?
A.
B.
C.
D.
Ribosome
Golgi apparatus
Endoplasmic reticulum
Nucleus
These diagrams represent different stages of animal cell
division. What is the correct order from start to finish?
A.
B.
C.
D.
3, 2, 1, 4
3, 1, 2, 4
2, 4, 3, 1
2, 3, 4, 1
During aerobic cellular respiration,
where do ATP molecules form?
A. Cytoplasm, mitochondrial
matrix, and mitochondrial
membrane only
B. Mitochondrial matrix and
mitochondrial membrane only
C. Cytoplasm only
D. Mitochondrial matrix only
What occurs during metaphase I of meiosis?
A. Homologous chromosome pairs line up along the cell’s
equator.
B. Homologous chromosomes move toward opposite
poles of the cell
C. Centromeres of replicated chromosomes line up along
the cell’s equator.
D. Centromeres divide as sister chromatids move towards
opposite poles of the cell’s equator.
How does the regulation of gene expression
lead to cell specialization?
A. Enzymes degrade unnecessary DNA.
B. Mutations change certain RNA
sequences.
C. Removal of exons from RNA prevents
translation into protein
D. Methylation of some regions of DNA
prevents transcription.
Which example best illustrates Mendel’s law of
independent assortment?
A. A tall purple-flowered pea plant and a short whiteflowered pea plant are crossed, producing offspring
including tall white-flowered pea plants.
B. A red-flowered snapdragon and a white-flowered
snapdragon are crossed, producing offspring with
pink flowers.
C. Two short-haired cats produce a litter of 4 kittens
including 1 long-haired and 3 short-haired.
D. A color-blind man and a woman with normal vision
produce a son with normal vision and a color-blind
daughter.
Jeanine inherited 2 alleles for round
eye shape and has round eye shape.
Her brother inherited 1 allele for
round eye shape and 1 allele for
almond eye shape. What type of
trait is round eye shape?
A.
B.
C.
D.
Co-dominant
Dominant
Recessive
Sex-linked
Two black guinea pigs bred and
produced 3 black offspring and 2
albino offspring. Assuming no
mutations, which guinea pigs must be
heterozygous?
A.
B.
C.
D.
All 3 black offspring
Exactly 2 of the black offspring
Both parents
Both albino offspring
When comparing 2 populations of
animals, which statement most likely
indicates that they are the same
species?
A. They inhabit the same general area.
B. Their outward appearance is similar.
C. They produce fertile offspring.
D. They consume the same type of
diet.
Which example best illustrates the process of
natural selection?
A. Giraffe necks varied in length, and all offspring
had an equal chance of survival.
B. Giraffes with short necks migrated to locations
best suited for their neck lengths.
C. Giraffe necks varied in length, and the short
necked giraffes were at a disadvantage.
D. Giraffes stretched their necks to read for food,
and resulting offspring had longer necks.
Maria wanted to rid her home of cockroaches. She applied
pesticide and after 1 day she found many dead
cockroaches. Days later, she observed a few live
cockroaches. She reapplied the pesticide, but she
continued to see some live cockroaches. What best
explains the continuing presence of live cockroaches?
A. A few cockroaches detected the pesticide and avoided
sprayed areas.
B. A few cockroaches exhibited pesticide resistance due
to natural variability with population.
C. A few cockroaches developed pesticide resistance
through contact with other resistant insects.
D. A few cockroaches developed pesticide resistance after
contact with it.
Horse skeleton fossils indicate that the size
of horses increased over time. Which
statement best explains the fossil record?
A. Smaller horses bred with larger horses,
creating hybrids
B. Smaller horses were infected by a fatal
virus early in history
C. Larger horses consumed the food supply
of the smaller horses
D. Larger horses produced a slightly
greater number of surviving offspring
Dinosaur species dominated Earth for over 100
million years. During this time, most mammals
were small mouse-sized nocturnal organisms.
Following the mass extinction of the dinosaurs,
the small mammals rapidly diversified to fill
available habitats and niches. What pattern of
evolution explains the diversification of
mammals?
A.
B.
C.
D.
Catastrophism
Punctuated equilibrium
Gradualism
Convergent evolution