PAX Science NLN Exam Questions and Answers Latest
2023 (Verified Answers)
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. – correct 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
B.) 120/80 mm Hg
C.) 100/80 mm Hg
D.) 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
PAX Science NLN Exam Questions and Answers Latest
2023 (Verified Answers)
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. – correct answer: apply quick, hard
pressures successively to her abdomen, just beneath her diaphragm.
An unknown gas is denser 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. – correct answer: carbon dioxide.
Human testes produce.
A.) eggs.
PAX Science NLN Exam Questions and Answers Latest
2023 (Verified Answers)
B.) follicle stimulating hormone.
C.) growth hormone.
D.) spermatozoa. – correct answer: spermatozoa.
If a red light is passed through a dilute solution of chlorophyll solution, the
spectrophotometer will detect what amount of transmittance of this light?
A.) 100%
B.) 50 – 75%
C.) Less than 25%
D.) None – correct answer: 50 – 75%
In diagnostic 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.
PAX Science NLN Exam Questions and Answers Latest
2023 (Verified Answers)
D.) measure the amount of air upon exhalation. – correct answer: examine
the impulses of the nerve cells within the brain.
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. – correct answer: boiling it in water for 15
minutes.
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
NLN Practice Test Science Pax Exam All (with correct
solutions) 2023 Update
An organism with chloroplast in its cell is probably a – correct answer
✅autotroph
autotrophs – correct answer ✅are organisms that produce their own food
from inorganic substances, plants are autotrophs
heterotrophs – correct answer ✅obtain their food by consuming plants or
other animals. They are also referred to as consumers.
Primary consumers may be herbivores
herbivores – correct answer ✅plant eaters
omnivores – correct answer ✅plant and meat eaters
Secondary consumers – correct answer ✅are carnivores, meat eaters, or
omnivores that eat herbivores.
NLN Practice Test Science Pax Exam All (with correct
solutions) 2023 Update
Tertiary consumers are carnivores that eat – correct answer ✅other
carnivores or omnivores.
What property of water allows someone to fill a glass slightly above the rim
without the water flowing over? – correct answer ✅surface tension
Water molecules are polar. This is due to the fact that oxygen draws the
electrons in the molecule toward itself. Thus, there is a negative charge
surrounding the oxygen and a positive charge around the hydrogen. The
unbalanced charges cause the water molecules to cluster, and this gives the
water the properties called surface tension. Surface tension is the the
attraction between molecules at the surface of a liquid, which allows a glass
to be filled above the rim without the water flowing over.
The gap between the neurons are called – correct answer ✅synapses
Which group of chemicals are not normally found in most living things? –
correct answer ✅silicates
Carbohydrates, proteins and nucleic acids (RNA and DNA) are all very
important chemicals in living things.
NLN Practice Test Science Pax Exam All (with correct
solutions) 2023 Update
Silicates examples are in sand and glass
The alimentary canal is associated with the – correct answer ✅the whole
passage along which food passes through the body from mouth to anus. It
includes the esophagus, stomach, and intestines.
digestive tract
The numerous villi in the small intestine serve to – correct answer ✅provide
greater surface area for absorption
As light passes obliquely from air to water, it is bent. The bending is called –
correct answer ✅refraction
refraction is the bending of light as it passes obliquely from one medium to
another, in this case from air to water. The speed of light wave changes
changes when it changes media. When the light wave enters the second
medium at an oblique angle, it changes direction; the light wave is bent.
NLN Practice Test Science Pax Exam All (with correct
solutions) 2023 Update
diffraction – correct answer ✅refers to the spreading of light waves as they
pass through a narrow opening
reflection – correct answer ✅occurs when light bounces off an object.
dispersion – correct answer ✅occurs when light is separated into its
spectrum
Which of the following organelles is not involved in protein synthesis? –
correct answer ✅mitochondrion
To be absorbed by cells, proteins must be changed into – correct answer
✅amino acids
A neuron that transmits impulses from the receptors to the spinal cord is
called – correct answer ✅a sensory neuron
cture for
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tivities of
the
(interstitial
he
nucleus
ertain funcof food
to ost of
its
NLN-PAX Science Exam Questions and Answers (Verified)
2023
1.the smallest living unit and the basic unit of function and stru
living things.: Cell
2.contains the genetic information, or DNA, and controls the
ac cell.: Nucleus
3.separates the contents of the cell from the surrounding
fluid fluid): Plasma (cell) membrane
4.refers to the selective nature of the plasma membrane. It contains pores
and channels that allow only particles of the right size or the right
chemical nature to pass through.: Semipermeable membrane
5.contains substances such as amino acids, sugars, fatty acids,
hormones, neurotransmitters, and salts.: Interstitial fluide
6.is the fluid matrix found between the plasma membrane and
t that acts as scaffolding for the organelles.: Cytoplasm
7.(little organs) are specialized units in the cell that per form
c tions.: Organelles
8.are the locations for cellular respiration, that is, the conversion
energy at the cellular level. The site of energy production and of
m ATP.: Mitochondria
9.the chemical the cell uses to store and transfer energy within itself.:
2 / 32
NLN-PAX Science Exam Questions and Answers (Verified)
2023
ATP (adenosine triphosphate)
d deliver the
f ribosomes
orage of
r things. It is
or for
export
are responhat are malon of the
cell,
Chloroplas
ts
he
cytocuoles
- are the sites of protein synthesis in the cell: Ribosomes
3 / 32
NLN-PAX Science Exam Questions and Answers (Verified)
2023 - Ribosomes are attached. Serves as a means for transport within
the cell and is made up of many channels. Rough endoplasmic reticulum
named for the fact that it has ribosomes on its surface, serves to store an
proteins made by the attached ribosomes. Smooth ER is free
o it performs varying functions in different cells, including the
st enzymes and minerals and the folding of proteins, among
othe
thought to be involved in the detoxification of chemicals and the
metabolism of fats.: Endoplasmic reticulum (ER)
12.modifies and packages proteins destined for use in the
cell from the cell.: Golgi complex
13.are sacs that contain strong digestive enzymes. These
sacs sible for digesting cell structures that are no longer living
or t functioning, and for digesting waste.: Lysosomes
14.Only plant cells have them. It is responsible for the
protecti the maintenance of the shape, and water balance.:
Cell wall - contain chlorophyll, which is necessary for photosynthesis.:
16.plant cells also often large ones. Which are compartments in
t plasm that act as places for secretion, excretion, and storage.:
Va
4 / 32
NLN-PAX Science Exam Questions and Answers (Verified)
2023
17.DNA is in this loosely structured form when it is not dividing: Chromatin
NLN Science practice test Questions and Answers (100%
Correct Answers) 2023
A drop of dilute ammonium hydroxide (NH4OH) is placed on one side of the
slide containing many swimming parmecium. Under this condition, which of
these behaviors of the paramecia will be observed? – correct answer ✅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
they will eventually all swim away from the ammonium hydroxide
A method for determining the blood alcohol content of a subject is to? –
correct answer ✅do a Mantoux test
do a dick test
use a breathalyzer
inspect the size of the pupils
use a breathalyzer
NLN Science practice test Questions and Answers (100%
Correct Answers) 2023
A person blows his breath into a straw that is placed in limewater. The
limewater becomes cloudy because the person’s breath contains? – correct
answer ✅carbon dioxide
hydrogen
oxygen
nitrogen
carbon dioxide
A person who was in an auto accident has formed a blood clot at the site of
the injury. One event that can lead to formation of a blood clot is that? –
correct answer ✅red blood cells release hemoglobin
bone marrow cells decrease platelet production
white blood cells release antibodies
ruptured platelets release thromboplastin
ruptured platelets release thromboplastin
NLN Science practice test Questions and Answers (100%
Correct Answers) 2023
An unknown gas is more dense than air, does not support combustion, and
turns a limewater solution cloudy. This gas is most probably? – correct
answer ✅ammonia
methane
carbon dioxide
hydrogen
carbon dioxide
Guard cells which can be found in the leaves of plants are most closely
associated with which of these processes? – correct answer ✅reproduction
of a new plant
evaporation of water from the plant
synthesis of organic substances in the plant
movement of organic and inorganic substances from soil to the plant
Human testes produce? – correct answer ✅eggs
follicle stimulating hormones
growth hormone