PAX Science NLN Exam questions and correct answers 2024
1. A person blows his breath into a straw that is placed answer: carbon
in limewater. The limewater becomes cloudy because dioxide.
the person's breath contains
A.) carbon dioxide.
B.) hydrogen.
C.) oxygen.
D.) nitrogen.
2. A physician measures the pulse and blood pressure answer: 120/80
(BP) of all patients on a routine basis. Which of these mm Hg
measurements show the normal BP values for a rest-
ing adult patient?
A.) 125/95 mm Hg
B.) 120/80 mm Hg
C.) 100/80 mm Hg
D.) 72/120 mm Hg
3. A woman suddenly chokes on a piece of food and answer: apply
clutches frantically at her throat. An immediate rem- quick, hard pres-
edy is to sures successive-
ly to her abdomen,
A.) have her bend forward and tell her to cough. just beneath her
B.) insert a finger or a blunt object toward the back of diaphragm.
the mouth.
C.) apply quick, hard pressures successively to her
abdomen, just beneath her diaphragm.
D.) phone "emergency" for help.
4. An unknown gas is more dense than air, does not answer: carbon
support combustion, and turns a limewater solution dioxide.
cloudy. This gas is most probably
A.) ammonia.
B.) methane.
C.) carbon dioxide.
C.) hydrogen.
,PAX Science NLN Exam questions and correct answers 2024
5. Human testes produce answer: sperma-
tozoa.
A.) eggs.
B.) follicle stimulating hormone.
C.) growth hormone.
D.) spermatozoa.
6. If a red light is passed through a dilute solution of answer: 50 - 75%
chlorophyll solution, the spectrophotometer will de-
tect what amount of transmittance of this light?
A.) 100%
B.) 50 - 75%
C.) Less than 25%
D.) None
7. In diagnostic testing, the electroencephalogram per- answer: examine
mits the physician to the impulses of
the nerve cells
A.) examine the impulses of the specialized muscle within the brain.
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. To sterilize a metal probe in the office, a dentist could answer: boiling it
use a steam sterilizer. If unavailable, the next most in water for 15
effective method to sterilize the instrument would be minutes.
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. In varieties of matter, the term heterogeneous may be answer: mixtures,
applied to but not elements
or compounds.
A.) elements, but not compounds.
B.) compounds, but not elements.
,PAX Science NLN Exam questions and correct answers 2024
C.) compounds and elements, but not mixtures.
D.) mixtures, but not elements or compounds.
10. Heat energy is absorbed in which of these phase answer: Br2 (l) ->
changes? Br2(g)
A.) Br2 (l) -> Br2(s)
B.) Br2 (g) --> Br2(l)
C.) Br2 (l) -> Br2(g)
D.) Br2 (g) -> Br2(s)
11. Periodontitis is an inflammatory condition of the answer: gum tis-
sue that surrounds
A.) gum tissue that surrounds the neck of each tooth. the neck of each
B.) pulp that contains nerve cells and blood vessels tooth.
of the tooth.
C.) dentin that surrounds the soft part of a tooth.
D.) enamel that provides a hard surface for chewing.
12. The atoms of an element with seven valence elec- answer: non-
trons are most probably classified as metals.
A.) metals.
B.) nonmetals.
C.) metalloids.
D.) noble gases.
13. The inherited factors that are transmitted in an organ- answer: genotype.
ism from generation to generation are called its
A.) homozygote.
B.) heterozygote.
C.) genotype.
D.) phenotype.
14. The process of nuclear cell division in the cell re- answer: cell plates
production of plants differs from mammals. A major are synthesized.
difference is that
A.) homologous chromosomes are paired.
, PAX Science NLN Exam questions and correct answers 2024
B.) centrioles are replicated.
C.) spindle fibers are missing.
D.) cell plates are synthesized.
15. Unicellular organisms that have a nucleus and can answer: proto-
swim with the aid of cilia are examples of zoans.
A.) monerans.
B.) plants.
C.) fungi.
D.) protozoans.
16. Which of these conditions is associated with smok- answer: Emphyse-
ing? ma.
A.) Esophageal varices.
B.) Tonsillitis.
C.) Emphysema.
D.) Blindness.
17. Which of these equations best illustrates a synthesis answer: 2Na + Cl2
reaction? -> 2NaCl
A.) 2Na + Cl2 -> 2NaCl
B.) NaOH + HCl -> NaCl + H2O
C.) 2H2O2 -> 2H2O + O2
D.) CH4 + 2O2 -> CO2 + 2H2O
18. Which of these hydrocarbons is a member of the answer: Toluene.
benzene family?
A.) Toluene.
B.) Ethyne.
C.) Propanone.
D.) Methanol.
19. Which of these quantities is most closely associated answer: Mass
with an object's inertia?
A.) Weight.
1. A person blows his breath into a straw that is placed answer: carbon
in limewater. The limewater becomes cloudy because dioxide.
the person's breath contains
A.) carbon dioxide.
B.) hydrogen.
C.) oxygen.
D.) nitrogen.
2. A physician measures the pulse and blood pressure answer: 120/80
(BP) of all patients on a routine basis. Which of these mm Hg
measurements show the normal BP values for a rest-
ing adult patient?
A.) 125/95 mm Hg
B.) 120/80 mm Hg
C.) 100/80 mm Hg
D.) 72/120 mm Hg
3. A woman suddenly chokes on a piece of food and answer: apply
clutches frantically at her throat. An immediate rem- quick, hard pres-
edy is to sures successive-
ly to her abdomen,
A.) have her bend forward and tell her to cough. just beneath her
B.) insert a finger or a blunt object toward the back of diaphragm.
the mouth.
C.) apply quick, hard pressures successively to her
abdomen, just beneath her diaphragm.
D.) phone "emergency" for help.
4. An unknown gas is more dense than air, does not answer: carbon
support combustion, and turns a limewater solution dioxide.
cloudy. This gas is most probably
A.) ammonia.
B.) methane.
C.) carbon dioxide.
C.) hydrogen.
,PAX Science NLN Exam questions and correct answers 2024
5. Human testes produce answer: sperma-
tozoa.
A.) eggs.
B.) follicle stimulating hormone.
C.) growth hormone.
D.) spermatozoa.
6. If a red light is passed through a dilute solution of answer: 50 - 75%
chlorophyll solution, the spectrophotometer will de-
tect what amount of transmittance of this light?
A.) 100%
B.) 50 - 75%
C.) Less than 25%
D.) None
7. In diagnostic testing, the electroencephalogram per- answer: examine
mits the physician to the impulses of
the nerve cells
A.) examine the impulses of the specialized muscle within the brain.
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. To sterilize a metal probe in the office, a dentist could answer: boiling it
use a steam sterilizer. If unavailable, the next most in water for 15
effective method to sterilize the instrument would be minutes.
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. In varieties of matter, the term heterogeneous may be answer: mixtures,
applied to but not elements
or compounds.
A.) elements, but not compounds.
B.) compounds, but not elements.
,PAX Science NLN Exam questions and correct answers 2024
C.) compounds and elements, but not mixtures.
D.) mixtures, but not elements or compounds.
10. Heat energy is absorbed in which of these phase answer: Br2 (l) ->
changes? Br2(g)
A.) Br2 (l) -> Br2(s)
B.) Br2 (g) --> Br2(l)
C.) Br2 (l) -> Br2(g)
D.) Br2 (g) -> Br2(s)
11. Periodontitis is an inflammatory condition of the answer: gum tis-
sue that surrounds
A.) gum tissue that surrounds the neck of each tooth. the neck of each
B.) pulp that contains nerve cells and blood vessels tooth.
of the tooth.
C.) dentin that surrounds the soft part of a tooth.
D.) enamel that provides a hard surface for chewing.
12. The atoms of an element with seven valence elec- answer: non-
trons are most probably classified as metals.
A.) metals.
B.) nonmetals.
C.) metalloids.
D.) noble gases.
13. The inherited factors that are transmitted in an organ- answer: genotype.
ism from generation to generation are called its
A.) homozygote.
B.) heterozygote.
C.) genotype.
D.) phenotype.
14. The process of nuclear cell division in the cell re- answer: cell plates
production of plants differs from mammals. A major are synthesized.
difference is that
A.) homologous chromosomes are paired.
, PAX Science NLN Exam questions and correct answers 2024
B.) centrioles are replicated.
C.) spindle fibers are missing.
D.) cell plates are synthesized.
15. Unicellular organisms that have a nucleus and can answer: proto-
swim with the aid of cilia are examples of zoans.
A.) monerans.
B.) plants.
C.) fungi.
D.) protozoans.
16. Which of these conditions is associated with smok- answer: Emphyse-
ing? ma.
A.) Esophageal varices.
B.) Tonsillitis.
C.) Emphysema.
D.) Blindness.
17. Which of these equations best illustrates a synthesis answer: 2Na + Cl2
reaction? -> 2NaCl
A.) 2Na + Cl2 -> 2NaCl
B.) NaOH + HCl -> NaCl + H2O
C.) 2H2O2 -> 2H2O + O2
D.) CH4 + 2O2 -> CO2 + 2H2O
18. Which of these hydrocarbons is a member of the answer: Toluene.
benzene family?
A.) Toluene.
B.) Ethyne.
C.) Propanone.
D.) Methanol.
19. Which of these quantities is most closely associated answer: Mass
with an object's inertia?
A.) Weight.
