NLN Practice Questions with verified
solutions 2024\2025 A+ Grade
1 kilogram (kg) of solid X at 10°C and 1 kg of solid Y at 10°C each absorb 5 joules of heat energy. The final
temperatures of X and Y are 15°C and 20°C, respectively. Compared to X, Y must have a lower
specific heat.
conductive heat.
heat of fusion.
heat of vaporization. - correct answer specific heat.
A drop of dilute ammonium hydroxide (NH4OH) is placed on one side of a slide containing a large
number of swimming paramecium. Under this condition, which of these behaviors of the paramecia will
be observed?
They will eventually all swim toward the ammonium hydroxide.
They will show no net change in behavior to the ammonium hydroxide.
They will all be instantly killed by the ammonium hydroxide.
They will eventually all swim away from the ammonium hydroxide. - correct answer They will eventually
all swim away from the ammonium hydroxide.
A method for determining the blood alcohol content of a subject is to
do a Mantoux test.
do a Dick test.
use a Breathalyzer.
inspect the size of the pupils. - correct answer use a Breathalyzer.
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?
125/95 mm Hg
,120/80 mm Hg
100/80 mm Hg
72/120 mm Hg - correct 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
have her bend forward and tell her to cough.
insert a finger or a blunt object toward the back of the mouth.
apply quick, hard pressures successively to her abdomen, just beneath her diaphragm.
phone "emergency" for help - correct 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
ammonia.
methane.
carbon dioxide.
hydrogen. - correct answer carbon dioxide
If the medulla of the brain in a human was damaged, which of these conditions would most likely result?
Inability to remember.
Difficulty in breathing.
Inability to speak.
Blurred vision. - correct answer Difficulty in breathing.
In diagnostic testing, the electroencephalogram permits the physician to
examine the impulses of the specialized muscle cells of the heart.
examine the impulses of the nerve cells within the brain.
measure the pressure within the eye.
,measure the amount of air upon exhalation. - correct answer examine the impulses of the nerve cells
within the brain.
In ecological succession, the first living thing to colonize a hitherto barren area is called a
producer.
primary consumer.
pioneer organism.
carnivore. - correct answer pioneer organism.
In varieties of matter, the term heterogeneous may be applied to
elements, but not compounds.
compounds, but not elements.
compounds and elements, but not mixtures.
mixtures, but not elements or compounds. - correct answer mixtures, but not elements or compounds.
Periodontitis is an inflammatory condition of the
gum tissue that surrounds the neck of each tooth.
pulp that contains nerve cells and blood vessels of the tooth.
dentin that surrounds the soft part of a tooth.
enamel that provides a hard surface for chewing. - correct answer gum tissue that surrounds the neck
of each tooth.
The atoms of an element with seven valence electrons are most probably classified as
metals.
nonmetals.
metalloids.
noble gases. - correct answer metals.
The bending of a wave around an obstacle is known as
, diffraction.
deflection.
refraction.
reflection. - correct answer diffraction.
The inherited factors that are transmitted in an organism from generation to generation are called its
homozygote.
heterozygote.
genotype.
phenotype. - correct answer genotype.
The organ that filters metabolic waste from the blood is the
small intestine.
liver.
kidney.
stomach. - correct answer kidney.
The process of nuclear cell division in the cell reproduction of plants differs from mammals. A major
difference is that
homologous chromosomes are paired.
centrioles are replicated.
spindle fibers are missing.
cell plates are synthesized. - correct answer homologous chromosomes are paired
In animals, the cell is split from the outside by a contractile ring, forming a cleavage furrow. A layer of
actin and myosin filaments underneath the plasma membrane at the cell center begins to contract until
the cell is essentially pinched in half. In plants, a new cell wall forms inside the cell that grows outward
until the formation of two new cells. The assembly of a new cell wall forms by vesicles filled with
cellulose and lignin, which eventually fuse together to create a new cell wall, and the parent cell splits in
two.
solutions 2024\2025 A+ Grade
1 kilogram (kg) of solid X at 10°C and 1 kg of solid Y at 10°C each absorb 5 joules of heat energy. The final
temperatures of X and Y are 15°C and 20°C, respectively. Compared to X, Y must have a lower
specific heat.
conductive heat.
heat of fusion.
heat of vaporization. - correct answer specific heat.
A drop of dilute ammonium hydroxide (NH4OH) is placed on one side of a slide containing a large
number of swimming paramecium. Under this condition, which of these behaviors of the paramecia will
be observed?
They will eventually all swim toward the ammonium hydroxide.
They will show no net change in behavior to the ammonium hydroxide.
They will all be instantly killed by the ammonium hydroxide.
They will eventually all swim away from the ammonium hydroxide. - correct answer They will eventually
all swim away from the ammonium hydroxide.
A method for determining the blood alcohol content of a subject is to
do a Mantoux test.
do a Dick test.
use a Breathalyzer.
inspect the size of the pupils. - correct answer use a Breathalyzer.
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?
125/95 mm Hg
,120/80 mm Hg
100/80 mm Hg
72/120 mm Hg - correct 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
have her bend forward and tell her to cough.
insert a finger or a blunt object toward the back of the mouth.
apply quick, hard pressures successively to her abdomen, just beneath her diaphragm.
phone "emergency" for help - correct 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
ammonia.
methane.
carbon dioxide.
hydrogen. - correct answer carbon dioxide
If the medulla of the brain in a human was damaged, which of these conditions would most likely result?
Inability to remember.
Difficulty in breathing.
Inability to speak.
Blurred vision. - correct answer Difficulty in breathing.
In diagnostic testing, the electroencephalogram permits the physician to
examine the impulses of the specialized muscle cells of the heart.
examine the impulses of the nerve cells within the brain.
measure the pressure within the eye.
,measure the amount of air upon exhalation. - correct answer examine the impulses of the nerve cells
within the brain.
In ecological succession, the first living thing to colonize a hitherto barren area is called a
producer.
primary consumer.
pioneer organism.
carnivore. - correct answer pioneer organism.
In varieties of matter, the term heterogeneous may be applied to
elements, but not compounds.
compounds, but not elements.
compounds and elements, but not mixtures.
mixtures, but not elements or compounds. - correct answer mixtures, but not elements or compounds.
Periodontitis is an inflammatory condition of the
gum tissue that surrounds the neck of each tooth.
pulp that contains nerve cells and blood vessels of the tooth.
dentin that surrounds the soft part of a tooth.
enamel that provides a hard surface for chewing. - correct answer gum tissue that surrounds the neck
of each tooth.
The atoms of an element with seven valence electrons are most probably classified as
metals.
nonmetals.
metalloids.
noble gases. - correct answer metals.
The bending of a wave around an obstacle is known as
, diffraction.
deflection.
refraction.
reflection. - correct answer diffraction.
The inherited factors that are transmitted in an organism from generation to generation are called its
homozygote.
heterozygote.
genotype.
phenotype. - correct answer genotype.
The organ that filters metabolic waste from the blood is the
small intestine.
liver.
kidney.
stomach. - correct answer kidney.
The process of nuclear cell division in the cell reproduction of plants differs from mammals. A major
difference is that
homologous chromosomes are paired.
centrioles are replicated.
spindle fibers are missing.
cell plates are synthesized. - correct answer homologous chromosomes are paired
In animals, the cell is split from the outside by a contractile ring, forming a cleavage furrow. A layer of
actin and myosin filaments underneath the plasma membrane at the cell center begins to contract until
the cell is essentially pinched in half. In plants, a new cell wall forms inside the cell that grows outward
until the formation of two new cells. The assembly of a new cell wall forms by vesicles filled with
cellulose and lignin, which eventually fuse together to create a new cell wall, and the parent cell splits in
two.
