PAX Science NLN Exam UPDATED VERSION
QUESTIONS AND CORRECT ANSWERS LATEST
UPDATE THIS YEAR
The atoms of an element with seven valence electrons are most probably classified as
A.) metals.
B.) nonmetals.
C.) metalloids.
D.) noble gases.
answer: nonmetals.
The inherited factors that are transmitted in an organism from generation to generation are called its
A.) homozygote.
B.) heterozygote.
C.) genotype.
D.) phenotype.
answer: genotype.
The process of nuclear cell division in the cell reproduction of plants differs from mammals. A major
difference is that
1
,A.) homologous chromosomes are paired.
B.) centrioles are replicated.
C.) spindle fibers are missing.
D.) cell plates are synthesized.
answer: cell plates are synthesized.
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.
answer: protozoans.
Which of these conditions is associated with smoking?
A.) Esophageal varices.
B.) Tonsillitis.
C.) Emphysema.
D.) Blindness.
answer: Emphysema.
2
,Which of these equations best illustrates a synthesis reaction?
A.) 2Na + Cl2 -> 2NaCl
B.) NaOH + HCl -> NaCl + H2O
C.) 2H2O2 -> 2H2O + O2
D.) CH4 + 2O2 -> CO2 + 2H2O
answer: 2Na + Cl2 -> 2NaCl
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.
answer: carbon dioxide.
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
3
, B.) 120/80 mm Hg
C.) 100/80 mm Hg
D.) 72/120 mm Hg
answer: 120/80 mm Hg
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.
answer: apply quick, hard pressures successively to her abdomen, just beneath her diaphragm.
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.
4
QUESTIONS AND CORRECT ANSWERS LATEST
UPDATE THIS YEAR
The atoms of an element with seven valence electrons are most probably classified as
A.) metals.
B.) nonmetals.
C.) metalloids.
D.) noble gases.
answer: nonmetals.
The inherited factors that are transmitted in an organism from generation to generation are called its
A.) homozygote.
B.) heterozygote.
C.) genotype.
D.) phenotype.
answer: genotype.
The process of nuclear cell division in the cell reproduction of plants differs from mammals. A major
difference is that
1
,A.) homologous chromosomes are paired.
B.) centrioles are replicated.
C.) spindle fibers are missing.
D.) cell plates are synthesized.
answer: cell plates are synthesized.
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.
answer: protozoans.
Which of these conditions is associated with smoking?
A.) Esophageal varices.
B.) Tonsillitis.
C.) Emphysema.
D.) Blindness.
answer: Emphysema.
2
,Which of these equations best illustrates a synthesis reaction?
A.) 2Na + Cl2 -> 2NaCl
B.) NaOH + HCl -> NaCl + H2O
C.) 2H2O2 -> 2H2O + O2
D.) CH4 + 2O2 -> CO2 + 2H2O
answer: 2Na + Cl2 -> 2NaCl
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.
answer: carbon dioxide.
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
3
, B.) 120/80 mm Hg
C.) 100/80 mm Hg
D.) 72/120 mm Hg
answer: 120/80 mm Hg
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.
answer: apply quick, hard pressures successively to her abdomen, just beneath her diaphragm.
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.
4
