NLN Pax Science Practice Tests
2026 Exam Questions and
Correct Answers | New Update
A person blows his breath into a straw that is placed in limewater. The
limewater becomes cloudy because the person's breath contains: - 🧠
ANSWER ✔✔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: - 🧠
ANSWER ✔✔ruptured 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? - 🧠 ANSWER ✔✔the approximate focal length of the lens
In ecological succession, the first living thing to colonize a hitherto barren
area is called a: - 🧠 ANSWER ✔✔pioneer organism
Unicellular organisms that have a nucleus and can swim with the aid of cilia
are examples of: - 🧠 ANSWER ✔✔protozoans
Which of these conditions is associated with smoking? - 🧠 ANSWER
✔✔emphysema
Which of these quantities is most closely associated with an object's
inertia? - 🧠 ANSWER ✔✔Mass
Which of these sequences of anatomic organization, from the simplest level
to the most complex, is the correct sequence? - 🧠 ANSWER ✔✔From
tissue, organ, organ system to organism
Which part of the cell structure controls the passage of materials into and
out of the cell? - 🧠 ANSWER ✔✔Plasma 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? - 🧠 ANSWER ✔✔Flush 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 - 🧠 ANSWER ✔✔Diffusion
You cut your finger rather deeply while slicing an apple. Which of these
actions should you take first? - 🧠 ANSWER ✔✔Wash 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: - 🧠 ANSWER ✔✔variation within a
species
A *tincture* is a solution in which: - 🧠 ANSWER ✔✔alcohol is the solvent
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
2026 Exam Questions and
Correct Answers | New Update
A person blows his breath into a straw that is placed in limewater. The
limewater becomes cloudy because the person's breath contains: - 🧠
ANSWER ✔✔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: - 🧠
ANSWER ✔✔ruptured 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? - 🧠 ANSWER ✔✔the approximate focal length of the lens
In ecological succession, the first living thing to colonize a hitherto barren
area is called a: - 🧠 ANSWER ✔✔pioneer organism
Unicellular organisms that have a nucleus and can swim with the aid of cilia
are examples of: - 🧠 ANSWER ✔✔protozoans
Which of these conditions is associated with smoking? - 🧠 ANSWER
✔✔emphysema
Which of these quantities is most closely associated with an object's
inertia? - 🧠 ANSWER ✔✔Mass
Which of these sequences of anatomic organization, from the simplest level
to the most complex, is the correct sequence? - 🧠 ANSWER ✔✔From
tissue, organ, organ system to organism
Which part of the cell structure controls the passage of materials into and
out of the cell? - 🧠 ANSWER ✔✔Plasma 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? - 🧠 ANSWER ✔✔Flush 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 - 🧠 ANSWER ✔✔Diffusion
You cut your finger rather deeply while slicing an apple. Which of these
actions should you take first? - 🧠 ANSWER ✔✔Wash 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: - 🧠 ANSWER ✔✔variation within a
species
A *tincture* is a solution in which: - 🧠 ANSWER ✔✔alcohol is the solvent
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
