PAX Science NLN Exam
1. answer: carbon dioxide.: A person blows his breath into a straw that is placed
in limewater. The limewater becomes cloudy because the person's breath contains
A.) carbon dioxide.
B.) hydrogen.
C.) oxygen.
D.) nitrogen.
2. answer: 120/80 mm Hg: A physician measures the pulse and blood pressure
(BP) of all patients on a routine basis. Which of these measurements show the
normal BP values for a resting adult patient?
A.) 125/95 mm Hg
B.) 120/80 mm Hg
C.) 100/80 mm Hg
D.) 72/120 mm Hg
3. answer: apply quick, hard pressures successively to her abdomen, just
beneath her diaphragm.: A woman suddenly chokes on a piece of food and
clutches frantically at her throat. An immediate remedy is to
A.) have her bend forward and tell her to cough.
B.) insert a finger or a blunt object toward the back of the mouth.
C.) apply quick, hard pressures successively to her abdomen, just beneath her
diaphragm.
D.) phone "emergency" for help.
4. answer: carbon dioxide.: An unknown gas is more dense than air, does not
support combustion, and turns a limewater solution cloudy. This gas is most probably
A.) ammonia.
B.) methane.
C.) carbon dioxide.
C.) hydrogen.
5. answer: spermatozoa.: Human testes produce
A.) eggs.
B.) follicle stimulating hormone.
C.) growth hormone.
D.) spermatozoa.
6. answer: 50 - 75%: If a red light is passed through a dilute solution of chlorophyll
solution, the spectrophotometer will detect what amount of transmittance of this
, PAX Science NLN Exam
light?
A.) 100%
B.) 50 - 75%
C.) Less than 25%
D.) None
7. answer: examine the impulses of the nerve cells within the brain.: In diag-
nostic testing, the electroencephalogram permits the physician to
A.) examine the impulses of the specialized muscle cells of the heart.
B.) examine the impulses of the nerve cells within the brain.
C.) measure the pressure within the eye.
D.) measure the amount of air upon exhalation.
8. answer: boiling it in water for 15 minutes.: To sterilize a metal probe in the
office, a dentist could use a steam sterilizer. If unavailable, the next most effective
method to sterilize the instrument would be
A.) boiling it in water for 15 minutes.
B.) dipping it into a concentrated acid solution.
C.) heating it in a hot air oven at 160°C for 20 minutes.
D.) washing it in soap and water.
9. answer: mixtures, but not elements or compounds.: In varieties of matter, the
term heterogeneous may be applied to
A.) elements, but not compounds.
B.) compounds, but not elements.
C.) compounds and elements, but not mixtures.
D.) mixtures, but not elements or compounds.
10. answer: Br2 (l) -> Br2(g): Heat energy is absorbed in which of these phase
changes?
A.) Br2 (l) -> Br2(s)
B.) Br2 (g) --> Br2(l)
C.) Br2 (l) -> Br2(g)
D.) Br2 (g) -> Br2(s)
11. answer: gum tissue that surrounds the neck of each tooth.: Periodontitis is
an inflammatory condition of the
A.) gum tissue that surrounds the neck of each tooth.
, PAX Science NLN Exam
B.) pulp that contains nerve cells and blood vessels of the tooth.
C.) dentin that surrounds the soft part of a tooth.
D.) enamel that provides a hard surface for chewing.
12. answer: nonmetals.: The atoms of an element with seven valence electrons are
most probably classified as
A.) metals.
B.) nonmetals.
C.) metalloids.
D.) noble gases.
13. answer: genotype.: The inherited factors that are transmitted in an organism
from generation to generation are called its
A.) homozygote.
B.) heterozygote.
C.) genotype.
D.) phenotype.
14. answer: cell plates are synthesized.: The process of nuclear cell division in
the cell reproduction of plants differs from mammals. A major difference is that
A.) homologous chromosomes are paired.
B.) centrioles are replicated.
C.) spindle fibers are missing.
D.) cell plates are synthesized.
15. answer: protozoans.: Unicellular organisms that have a nucleus and can swim
with the aid of cilia are examples of
A.) monerans.
B.) plants.
C.) fungi.
D.) protozoans.
16. answer: Emphysema.: Which of these conditions is associated with smoking?
A.) Esophageal varices.
B.) Tonsillitis.
C.) Emphysema.
D.) Blindness.
17. answer: 2Na + Cl2 -> 2NaCl: Which of these equations best illustrates a
synthesis reaction?
, PAX Science NLN Exam
A.) 2Na + Cl2 -> 2NaCl
B.) NaOH + HCl -> NaCl + H2O
C.) 2H2O2 -> 2H2O + O2
D.) CH4 + 2O2 -> CO2 + 2H2O
18. answer: Toluene.: Which of these hydrocarbons is a member of the benzene
family?
A.) Toluene.
B.) Ethyne.
C.) Propanone.
D.) Methanol.
19. answer: Mass: Which of these quantities is most closely associated with an
object's inertia?
A.) Weight.
B.) Energy.
C.) Power.
D.) Mass.
20. answer: From tissue, organ, organ system to organism: Which of these
sequences of anatomic organization, from the simplest level to the most complex,
is the correct sequence?
A.) From tissue, organ, organ system to organism.
B.) From organ system, organ, tissue to organism.
C.) From tissue, organ system, organ to organism.
D.) From organ, organ system, tissue to organism.
21. answer: An ammeter.: Which of these single instruments may be used to
measure the current flowing through a circuit?
A.) A voltmeter.
B.) An ammeter.
C.) A potentiometer.
D.) An ohmmeter.
22. answer: 0 K: Which of these temperatures is known as Absolute Zero?
A.) 0°C
B.) 0 K
1. answer: carbon dioxide.: A person blows his breath into a straw that is placed
in limewater. The limewater becomes cloudy because the person's breath contains
A.) carbon dioxide.
B.) hydrogen.
C.) oxygen.
D.) nitrogen.
2. answer: 120/80 mm Hg: A physician measures the pulse and blood pressure
(BP) of all patients on a routine basis. Which of these measurements show the
normal BP values for a resting adult patient?
A.) 125/95 mm Hg
B.) 120/80 mm Hg
C.) 100/80 mm Hg
D.) 72/120 mm Hg
3. answer: apply quick, hard pressures successively to her abdomen, just
beneath her diaphragm.: A woman suddenly chokes on a piece of food and
clutches frantically at her throat. An immediate remedy is to
A.) have her bend forward and tell her to cough.
B.) insert a finger or a blunt object toward the back of the mouth.
C.) apply quick, hard pressures successively to her abdomen, just beneath her
diaphragm.
D.) phone "emergency" for help.
4. answer: carbon dioxide.: An unknown gas is more dense than air, does not
support combustion, and turns a limewater solution cloudy. This gas is most probably
A.) ammonia.
B.) methane.
C.) carbon dioxide.
C.) hydrogen.
5. answer: spermatozoa.: Human testes produce
A.) eggs.
B.) follicle stimulating hormone.
C.) growth hormone.
D.) spermatozoa.
6. answer: 50 - 75%: If a red light is passed through a dilute solution of chlorophyll
solution, the spectrophotometer will detect what amount of transmittance of this
, PAX Science NLN Exam
light?
A.) 100%
B.) 50 - 75%
C.) Less than 25%
D.) None
7. answer: examine the impulses of the nerve cells within the brain.: In diag-
nostic testing, the electroencephalogram permits the physician to
A.) examine the impulses of the specialized muscle cells of the heart.
B.) examine the impulses of the nerve cells within the brain.
C.) measure the pressure within the eye.
D.) measure the amount of air upon exhalation.
8. answer: boiling it in water for 15 minutes.: To sterilize a metal probe in the
office, a dentist could use a steam sterilizer. If unavailable, the next most effective
method to sterilize the instrument would be
A.) boiling it in water for 15 minutes.
B.) dipping it into a concentrated acid solution.
C.) heating it in a hot air oven at 160°C for 20 minutes.
D.) washing it in soap and water.
9. answer: mixtures, but not elements or compounds.: In varieties of matter, the
term heterogeneous may be applied to
A.) elements, but not compounds.
B.) compounds, but not elements.
C.) compounds and elements, but not mixtures.
D.) mixtures, but not elements or compounds.
10. answer: Br2 (l) -> Br2(g): Heat energy is absorbed in which of these phase
changes?
A.) Br2 (l) -> Br2(s)
B.) Br2 (g) --> Br2(l)
C.) Br2 (l) -> Br2(g)
D.) Br2 (g) -> Br2(s)
11. answer: gum tissue that surrounds the neck of each tooth.: Periodontitis is
an inflammatory condition of the
A.) gum tissue that surrounds the neck of each tooth.
, PAX Science NLN Exam
B.) pulp that contains nerve cells and blood vessels of the tooth.
C.) dentin that surrounds the soft part of a tooth.
D.) enamel that provides a hard surface for chewing.
12. answer: nonmetals.: The atoms of an element with seven valence electrons are
most probably classified as
A.) metals.
B.) nonmetals.
C.) metalloids.
D.) noble gases.
13. answer: genotype.: The inherited factors that are transmitted in an organism
from generation to generation are called its
A.) homozygote.
B.) heterozygote.
C.) genotype.
D.) phenotype.
14. answer: cell plates are synthesized.: The process of nuclear cell division in
the cell reproduction of plants differs from mammals. A major difference is that
A.) homologous chromosomes are paired.
B.) centrioles are replicated.
C.) spindle fibers are missing.
D.) cell plates are synthesized.
15. answer: protozoans.: Unicellular organisms that have a nucleus and can swim
with the aid of cilia are examples of
A.) monerans.
B.) plants.
C.) fungi.
D.) protozoans.
16. answer: Emphysema.: Which of these conditions is associated with smoking?
A.) Esophageal varices.
B.) Tonsillitis.
C.) Emphysema.
D.) Blindness.
17. answer: 2Na + Cl2 -> 2NaCl: Which of these equations best illustrates a
synthesis reaction?
, PAX Science NLN Exam
A.) 2Na + Cl2 -> 2NaCl
B.) NaOH + HCl -> NaCl + H2O
C.) 2H2O2 -> 2H2O + O2
D.) CH4 + 2O2 -> CO2 + 2H2O
18. answer: Toluene.: Which of these hydrocarbons is a member of the benzene
family?
A.) Toluene.
B.) Ethyne.
C.) Propanone.
D.) Methanol.
19. answer: Mass: Which of these quantities is most closely associated with an
object's inertia?
A.) Weight.
B.) Energy.
C.) Power.
D.) Mass.
20. answer: From tissue, organ, organ system to organism: Which of these
sequences of anatomic organization, from the simplest level to the most complex,
is the correct sequence?
A.) From tissue, organ, organ system to organism.
B.) From organ system, organ, tissue to organism.
C.) From tissue, organ system, organ to organism.
D.) From organ, organ system, tissue to organism.
21. answer: An ammeter.: Which of these single instruments may be used to
measure the current flowing through a circuit?
A.) A voltmeter.
B.) An ammeter.
C.) A potentiometer.
D.) An ohmmeter.
22. answer: 0 K: Which of these temperatures is known as Absolute Zero?
A.) 0°C
B.) 0 K
