NLN Pax Science practice tests
A person blows his breath into a straw that is placed in limewater. The limewater becomes
cloudy because the person's breath contains: - ANScarbon 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: - ANSruptured platelets release
thromboplastin
A student focuses sunlight to a point with a thin converging (convex) lens. Which of these direct
measurements can the student make as a result of this experiment? - ANSthe approximate
focal length of the lens
In ecological succession, the first living thing to colonize a hitherto barren area is called a: -
ANSpioneer organism
Unicellular organisms that have a nucleus and can swim with the aid of cilia are examples of: -
ANSprotozoans
Which of these conditions is associated with smoking? - ANSemphysema
Which of these quantities is most closely associated with an object's inertia? - ANSMass
Which of these sequences of anatomic organization, from the simplest level to the most
complex, is the correct sequence? - ANSFrom tissue, organ, organ system to organism
Which part of the cell structure controls the passage of materials into and out of the cell? -
ANSPlasma membrane
While working in the chemistry laboratory, a student spills dilute hydrochloric acid on her hand.
What is the first action this student should take? - ANSFlush her hand with large quantities of
water
Within a living cell, the oxygen (O2) from a mixture of O2 and carbon dioxide (CO2) is used up.
This creates a concentration gradient across the cell membrane, drawing O2 across the
membrane from the outside in, a process known as - ANSDiffusion
You cut your finger rather deeply while slicing an apple. Which of these actions should you take
first? - ANSWash the wound continuously with cold running water
30 students in a class carefully measure the length and width of 20 peanut shells. They also
count the number and note the size of the peanuts inside. This information is recorded on
, various graphs showing the numbers of nuts and the different sizes. The collected evidence of
the peanuts gives the students an idea of the extent of: - ANSvariation within a species
A *tincture* is a solution in which: - ANSalcohol is the solvent
All the glucose filtered from the blood in the glomerulus into the Bowman's capsule of the kidney
nephron is returned to the tissue fluid while passing along the proximal tubule. This rapid return
is effected by the process of: - ANSactive transport
If the night temperature drops 50 degrees, the roadrunner's internal energy-conservation
permits a lowering of body temperature to: - ANS94°F
1 kilogram (kg) of solid X at 10C and 1 kg of solid Y 10C each absorb 5 joules of heat energy.
The final temperatures on X and Y is 15C and 20C, respectively. Compared to X, Y must have a
lower:F - ANSspecific heat
A woman suddenly chokes on a piece of food and clutches frantically at her throat. An
immediate remedy is to: - ANSapply quick, hard pressures successively to her abdomen, just
below 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: - ANScarbon dioxide
Night blindness in humans is caused by a lack of: - ANSVitamin A
In varieties of matter, the term heterogeneous may be applied to: - ANSmixtures, but not
elements or compounds
The atoms of an element with seven valence electrons are most probably classified as: -
ANSnonmetals
The inherited factors that are transmitted in a organism from generation to generation are called
its: - ANSgenotype
Which of these conditions is associated with smoking? - ANSEmphysema
Within which of these structures of the female reproductive tract is the human egg fertilized? -
ANSFallopian tube
A cell which manufactures a large amount of protein for export would have an abundance of
organelles called: - ANSribosomes
A lens that focuses distant light to a single point is known as a : - ANSconverging (convex) lens
A person blows his breath into a straw that is placed in limewater. The limewater becomes
cloudy because the person's breath contains: - ANScarbon 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: - ANSruptured platelets release
thromboplastin
A student focuses sunlight to a point with a thin converging (convex) lens. Which of these direct
measurements can the student make as a result of this experiment? - ANSthe approximate
focal length of the lens
In ecological succession, the first living thing to colonize a hitherto barren area is called a: -
ANSpioneer organism
Unicellular organisms that have a nucleus and can swim with the aid of cilia are examples of: -
ANSprotozoans
Which of these conditions is associated with smoking? - ANSemphysema
Which of these quantities is most closely associated with an object's inertia? - ANSMass
Which of these sequences of anatomic organization, from the simplest level to the most
complex, is the correct sequence? - ANSFrom tissue, organ, organ system to organism
Which part of the cell structure controls the passage of materials into and out of the cell? -
ANSPlasma membrane
While working in the chemistry laboratory, a student spills dilute hydrochloric acid on her hand.
What is the first action this student should take? - ANSFlush her hand with large quantities of
water
Within a living cell, the oxygen (O2) from a mixture of O2 and carbon dioxide (CO2) is used up.
This creates a concentration gradient across the cell membrane, drawing O2 across the
membrane from the outside in, a process known as - ANSDiffusion
You cut your finger rather deeply while slicing an apple. Which of these actions should you take
first? - ANSWash the wound continuously with cold running water
30 students in a class carefully measure the length and width of 20 peanut shells. They also
count the number and note the size of the peanuts inside. This information is recorded on
, various graphs showing the numbers of nuts and the different sizes. The collected evidence of
the peanuts gives the students an idea of the extent of: - ANSvariation within a species
A *tincture* is a solution in which: - ANSalcohol is the solvent
All the glucose filtered from the blood in the glomerulus into the Bowman's capsule of the kidney
nephron is returned to the tissue fluid while passing along the proximal tubule. This rapid return
is effected by the process of: - ANSactive transport
If the night temperature drops 50 degrees, the roadrunner's internal energy-conservation
permits a lowering of body temperature to: - ANS94°F
1 kilogram (kg) of solid X at 10C and 1 kg of solid Y 10C each absorb 5 joules of heat energy.
The final temperatures on X and Y is 15C and 20C, respectively. Compared to X, Y must have a
lower:F - ANSspecific heat
A woman suddenly chokes on a piece of food and clutches frantically at her throat. An
immediate remedy is to: - ANSapply quick, hard pressures successively to her abdomen, just
below 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: - ANScarbon dioxide
Night blindness in humans is caused by a lack of: - ANSVitamin A
In varieties of matter, the term heterogeneous may be applied to: - ANSmixtures, but not
elements or compounds
The atoms of an element with seven valence electrons are most probably classified as: -
ANSnonmetals
The inherited factors that are transmitted in a organism from generation to generation are called
its: - ANSgenotype
Which of these conditions is associated with smoking? - ANSEmphysema
Within which of these structures of the female reproductive tract is the human egg fertilized? -
ANSFallopian tube
A cell which manufactures a large amount of protein for export would have an abundance of
organelles called: - ANSribosomes
A lens that focuses distant light to a single point is known as a : - ANSconverging (convex) lens
