TEAS 7 SCIENCE STUDY GUIDE EXAM
QUESTIONS WITH COMPLETE
ANSWERS
A person is suddenly frightened. Which of the following reactions occurs next?
a) liver cells absorb glucose from the bloodstream
b) blood vessels supplying skeletal muscles constrict
c) blood vessels supplying intestines dilate
d) Liver cells release glucose into the blood stream - Answer-d) Liver cells release
glucose into the blood stream
Which of the following is an example of positive feedback?
a) oxytocin causes an increase in uterine muscle contractions, ultimately causing the
posterior pituitary to release more oxytocin
b) an increase in blood glucose levels causes the release of insulin which results in the
lowering of glucose levels in the blood and halting the release of insulin
c) a drop in the body temp causes the hypothalamus to activate warming mechanisms,
which results in the increase of body temp
d) an increase in blood osmolarity causes the release of adh which causes urine to
become more concentrated and osmolarity to decrease - Answer-a) oxytocin causes an
increase in uterine muscle contractions, ultimately causing the posterior pituitary to
release more oxytocin
Demyelinization results in which of the following?
A. Inhibited detection of a stimulus at the dendrites of a nerve cell
B. Disrupted propagation of an action potential along the axon of a nerve cell
C. Inhibited uptake of neurotransmitters at the synapse of a nerve cell
D. Disrupted ability of the Na+/K+ pumps to depolarize a cell - Answer-B. Disrupted
propagation of an action potential along the axon of a nerve cell
The nephridium in worms has a function most similar to which of the following organs in
humans?
a) liver
b) spleen
c) lymph nodes
d) kidneys - Answer-d) kidneys
Ca+ H2SO4
a) calcium sulfate
b) Hydrogen Sulfide
c) Calcium Sulfide
d) Hydrogen Sulfate - Answer-a) calcium sulfate
,Which of the following classes of biomolecules can influence the rate of specific
chemical reactions within the living cell?
a) nucleic acids
B) proteins
c) lipids
d) carbohydrates - Answer-B) proteins
Which of the following terms describes a sample composed of particles condensed into
a small space and having vibrational but not translational motion?
a) solid
b) liquid
c) gas
d) plasm - Answer-a) solid
An atom has 3 protons, 4 neutrons and 3 electrons. Which of the following is the atoms
mass number?
a) 3
b) 6
c) 7
d) 10 - Answer-c) 7
Which of the substances will dissovle in water?
a) CH4
b) CCl4
c) CH3OH
d) C8H18 - Answer-c) CH3OH
Purple eyes (F) are dominant over pink eyes (f). Which of the following will produce only
offspring with pink eyes?
a) Ff x ff
b) Ff x Ff
c) FFx ff
d) ff x ff - Answer-d) ff x ff
A pregnant person who is a chain smoker has been diagnosed with lung cancer. Their
biggest concern is if they have passed on the lung cancer to their child. Which of the
following statements is correct regarding this situation?
a) children do not use their lungs until they are born so the cancer cannot pass to the
child before birth
b) the cancer could pass from birth parent to fetus through blood, but anticancer
medications can prevent the child fro developing cancer
c) if the pregnant parent undergoes treatment for lung cancer, both ther and the child
can be cured
d) the cancer will not be transmitted to the child - Answer-d) the cancer will not be
transmitted to the child
, In mendelian inheritance, the dominant allele is for tall plants and the recessive allele is
for short plants. Which of the following statements is true?
a) Tt is a phenotype that gives 50% short and 50% tall genotype
b) TT and Tt are both genotypes for the homozygous recessive phenotype
c) TT is the dominant phenotype, and the tall plant is the resulting genotype
d) TT and Tt are both genotypes for the tall plant phenotype - Answer-d) TT and Tt are
both genotypes for the tall plant phenotype
Two researchers note that when weeds a and b grow next to each other the roots of
weed a stop growing when they enter the root zone of weed b.
Because activated charcoal is known to absorb organic compounds, the researchers
apply activate charcoal to the soil around the weed b. they not the roots of weed a then
grow into the zone of weed b.
Which if the following hypotheses is being tested by?
a) weed a absorbs activated charcoal, which enhances root growth for weed a
b) weed b grows best in soil that contains few organic compounds
c) weed a is attracted to soil that contains activated charcoal
d) weed b produces an organic compound that inhibits root growth for weed a - Answer-
d) weed b produces an organic compound that inhibits root growth for weed a
In a well-controlled experiment, researchers shows that a common topical antibiotic
called chloramphenicol halts deadly fungal growth on the skin of amphibians. Which of
the following is the best inference for how the antibiotic works to limit a fungal disease?
a) the antibiotic causes a mutation in the skin tissue that makes It resistant to the fungus
b) the antibiotic acts as a physical barrier that interferes with fungal growth
c) the antibiotic kills a bacterial partner that is essential for fungal infection
d) the antibiotic activates white blood cells production - Answer-c) the antibiotic kills a
bacterial partner that is essential for fungal infection
A defining characteristic of a scientific hypothesis is that it is
a) testable
b) unexpected
c) correct
d) predictable - Answer-a) testable
The use of an electron microscope would most benefit the study of
a) the structure of atoms
b) the structure of cellular organelles
c) the structure of skeletal joints
d) chemical bonds in molecules - Answer-b) the structure of cellular organelles
Which of the following structures diverts food into the esophagus and prevents it from
entering the lungs?
a) uvula
b) soft palate
QUESTIONS WITH COMPLETE
ANSWERS
A person is suddenly frightened. Which of the following reactions occurs next?
a) liver cells absorb glucose from the bloodstream
b) blood vessels supplying skeletal muscles constrict
c) blood vessels supplying intestines dilate
d) Liver cells release glucose into the blood stream - Answer-d) Liver cells release
glucose into the blood stream
Which of the following is an example of positive feedback?
a) oxytocin causes an increase in uterine muscle contractions, ultimately causing the
posterior pituitary to release more oxytocin
b) an increase in blood glucose levels causes the release of insulin which results in the
lowering of glucose levels in the blood and halting the release of insulin
c) a drop in the body temp causes the hypothalamus to activate warming mechanisms,
which results in the increase of body temp
d) an increase in blood osmolarity causes the release of adh which causes urine to
become more concentrated and osmolarity to decrease - Answer-a) oxytocin causes an
increase in uterine muscle contractions, ultimately causing the posterior pituitary to
release more oxytocin
Demyelinization results in which of the following?
A. Inhibited detection of a stimulus at the dendrites of a nerve cell
B. Disrupted propagation of an action potential along the axon of a nerve cell
C. Inhibited uptake of neurotransmitters at the synapse of a nerve cell
D. Disrupted ability of the Na+/K+ pumps to depolarize a cell - Answer-B. Disrupted
propagation of an action potential along the axon of a nerve cell
The nephridium in worms has a function most similar to which of the following organs in
humans?
a) liver
b) spleen
c) lymph nodes
d) kidneys - Answer-d) kidneys
Ca+ H2SO4
a) calcium sulfate
b) Hydrogen Sulfide
c) Calcium Sulfide
d) Hydrogen Sulfate - Answer-a) calcium sulfate
,Which of the following classes of biomolecules can influence the rate of specific
chemical reactions within the living cell?
a) nucleic acids
B) proteins
c) lipids
d) carbohydrates - Answer-B) proteins
Which of the following terms describes a sample composed of particles condensed into
a small space and having vibrational but not translational motion?
a) solid
b) liquid
c) gas
d) plasm - Answer-a) solid
An atom has 3 protons, 4 neutrons and 3 electrons. Which of the following is the atoms
mass number?
a) 3
b) 6
c) 7
d) 10 - Answer-c) 7
Which of the substances will dissovle in water?
a) CH4
b) CCl4
c) CH3OH
d) C8H18 - Answer-c) CH3OH
Purple eyes (F) are dominant over pink eyes (f). Which of the following will produce only
offspring with pink eyes?
a) Ff x ff
b) Ff x Ff
c) FFx ff
d) ff x ff - Answer-d) ff x ff
A pregnant person who is a chain smoker has been diagnosed with lung cancer. Their
biggest concern is if they have passed on the lung cancer to their child. Which of the
following statements is correct regarding this situation?
a) children do not use their lungs until they are born so the cancer cannot pass to the
child before birth
b) the cancer could pass from birth parent to fetus through blood, but anticancer
medications can prevent the child fro developing cancer
c) if the pregnant parent undergoes treatment for lung cancer, both ther and the child
can be cured
d) the cancer will not be transmitted to the child - Answer-d) the cancer will not be
transmitted to the child
, In mendelian inheritance, the dominant allele is for tall plants and the recessive allele is
for short plants. Which of the following statements is true?
a) Tt is a phenotype that gives 50% short and 50% tall genotype
b) TT and Tt are both genotypes for the homozygous recessive phenotype
c) TT is the dominant phenotype, and the tall plant is the resulting genotype
d) TT and Tt are both genotypes for the tall plant phenotype - Answer-d) TT and Tt are
both genotypes for the tall plant phenotype
Two researchers note that when weeds a and b grow next to each other the roots of
weed a stop growing when they enter the root zone of weed b.
Because activated charcoal is known to absorb organic compounds, the researchers
apply activate charcoal to the soil around the weed b. they not the roots of weed a then
grow into the zone of weed b.
Which if the following hypotheses is being tested by?
a) weed a absorbs activated charcoal, which enhances root growth for weed a
b) weed b grows best in soil that contains few organic compounds
c) weed a is attracted to soil that contains activated charcoal
d) weed b produces an organic compound that inhibits root growth for weed a - Answer-
d) weed b produces an organic compound that inhibits root growth for weed a
In a well-controlled experiment, researchers shows that a common topical antibiotic
called chloramphenicol halts deadly fungal growth on the skin of amphibians. Which of
the following is the best inference for how the antibiotic works to limit a fungal disease?
a) the antibiotic causes a mutation in the skin tissue that makes It resistant to the fungus
b) the antibiotic acts as a physical barrier that interferes with fungal growth
c) the antibiotic kills a bacterial partner that is essential for fungal infection
d) the antibiotic activates white blood cells production - Answer-c) the antibiotic kills a
bacterial partner that is essential for fungal infection
A defining characteristic of a scientific hypothesis is that it is
a) testable
b) unexpected
c) correct
d) predictable - Answer-a) testable
The use of an electron microscope would most benefit the study of
a) the structure of atoms
b) the structure of cellular organelles
c) the structure of skeletal joints
d) chemical bonds in molecules - Answer-b) the structure of cellular organelles
Which of the following structures diverts food into the esophagus and prevents it from
entering the lungs?
a) uvula
b) soft palate
