PAX Science NLN Exam / 270 Q&A / 2024-
2025.
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
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,B.) 120/80 mm Hg
C.) 100/80 mm Hg
D.) 72/120 mm Hg Answer: 120/80 mm Hg
A circuit contains three 3-ohm (W) resistors in series. What is the equivalent resistance of this
combination? Answer: 9W
An example of an adaptation to prevent water loss in plants is Answer: waxy epidermis
At room temperature, which of these substances exists as diatomic molecules? Answer: oxygen
Compounds with the same type and number of atoms and the same chemical bonds but
different spatial arrangements of these bonds and atoms are called Answer: structural isomers.
The calorie and the kilocalorie are units of Answer: energy
The force of gravity on an object is that object's Answer: weight
The light sensitive cells of the eye are called rods and cones. Which of these layers of the eye
are they found in? Answer: retina
The meiotic division of cells leads to the production of cells that Answer: contain half the usual
number of chromosomes.
The most probable area of study that would show the prevalence of mental illness in mid-
Manhattan is that of Answer: epidemiology
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,The normal boiling temperature for water is 100° when measured on which of these scales?
Answer: celsius
What is the pH of a solution whose H+ ion concentration is 1 x 10-2 mole per liter? Answer: 2
When a column of air is vibrating at the same rate as a tuning fork, the process is referred to as
Answer: resonance
When a population is in Hardy-Weinberg equilibrium, which of these conditions must be
present? Answer: The population is isolated from other populations.
When three resistors of 10.0 ohms each are placed in series, the total resistance is Answer:
30.0 ohms
Which of these changes occurs in the kidneys when a person becomes dehydrated? Answer:
The filtration rate of water remains constant and the reabsorption of water increases.
Which of these could be stopped by a sheet of paper? Answer: Alpha particle
Which of these is an example of a simple machine? Answer: lever, pulley, inclined plane
Which of these organisms might be found in contaminated well water? Answer: Giardia
Which of these processes occurs at a neuromuscular junction? Answer: Impulse transmission.
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 Answer: specific heat
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, 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? Answer: They will eventually all swim away from the ammonium
hydroxide.
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? Answer:
120/.80 mmHg
Which of these processes is responsible for the recorded production of CO2 by yeast cells from
sugar solution? Answer: anaerobic respiration
In classical physics, light is viewed as part of the electromagnetic spectrum, traveling in the form
of transverse waves. Quantum physics proposes that light is composed of quanta called Answer:
photons
Enzymes that are involved in biochemical reactions are organic Answer: catalysts
How much current is drawn by a light bulb that has a resistance of 100 R with a voltage of 110
V? (V = IR) Answer: 1.1 amperes
Sodium will react most readily with Answer: chlorine
The watt is a unit of Answer: power
The boiling point of liquid nitrogen at one atmosphere pressure is 77 K. This temperature is
equivalent to. Answer: - 196 C
The energy associated with an object's position is termed Answer: potential energy
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2025.
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
Page 1 of 52
,B.) 120/80 mm Hg
C.) 100/80 mm Hg
D.) 72/120 mm Hg Answer: 120/80 mm Hg
A circuit contains three 3-ohm (W) resistors in series. What is the equivalent resistance of this
combination? Answer: 9W
An example of an adaptation to prevent water loss in plants is Answer: waxy epidermis
At room temperature, which of these substances exists as diatomic molecules? Answer: oxygen
Compounds with the same type and number of atoms and the same chemical bonds but
different spatial arrangements of these bonds and atoms are called Answer: structural isomers.
The calorie and the kilocalorie are units of Answer: energy
The force of gravity on an object is that object's Answer: weight
The light sensitive cells of the eye are called rods and cones. Which of these layers of the eye
are they found in? Answer: retina
The meiotic division of cells leads to the production of cells that Answer: contain half the usual
number of chromosomes.
The most probable area of study that would show the prevalence of mental illness in mid-
Manhattan is that of Answer: epidemiology
Page 2 of 52
,The normal boiling temperature for water is 100° when measured on which of these scales?
Answer: celsius
What is the pH of a solution whose H+ ion concentration is 1 x 10-2 mole per liter? Answer: 2
When a column of air is vibrating at the same rate as a tuning fork, the process is referred to as
Answer: resonance
When a population is in Hardy-Weinberg equilibrium, which of these conditions must be
present? Answer: The population is isolated from other populations.
When three resistors of 10.0 ohms each are placed in series, the total resistance is Answer:
30.0 ohms
Which of these changes occurs in the kidneys when a person becomes dehydrated? Answer:
The filtration rate of water remains constant and the reabsorption of water increases.
Which of these could be stopped by a sheet of paper? Answer: Alpha particle
Which of these is an example of a simple machine? Answer: lever, pulley, inclined plane
Which of these organisms might be found in contaminated well water? Answer: Giardia
Which of these processes occurs at a neuromuscular junction? Answer: Impulse transmission.
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 Answer: specific heat
Page 3 of 52
, 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? Answer: They will eventually all swim away from the ammonium
hydroxide.
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? Answer:
120/.80 mmHg
Which of these processes is responsible for the recorded production of CO2 by yeast cells from
sugar solution? Answer: anaerobic respiration
In classical physics, light is viewed as part of the electromagnetic spectrum, traveling in the form
of transverse waves. Quantum physics proposes that light is composed of quanta called Answer:
photons
Enzymes that are involved in biochemical reactions are organic Answer: catalysts
How much current is drawn by a light bulb that has a resistance of 100 R with a voltage of 110
V? (V = IR) Answer: 1.1 amperes
Sodium will react most readily with Answer: chlorine
The watt is a unit of Answer: power
The boiling point of liquid nitrogen at one atmosphere pressure is 77 K. This temperature is
equivalent to. Answer: - 196 C
The energy associated with an object's position is termed Answer: potential energy
Page 4 of 52
