PAX Science NLN Exam | Verified
Questions with 100% Accurate
Answers | A+ Graded | 2025/2026
Edition
Section 1: Introduction
This document provides a complete and verified set of science questions and answers for the
PAX (Pre-Admission Examination) NLN, updated for the 2025/2026 testing cycle. It covers
high-priority topics across biology, chemistry, physics, anatomy & physiology, microbiology,
and scientific reasoning—designed to assess readiness for nursing school admission. Each
answer is 100% accurate and A+ graded, aligned with the NLN PAX Science blueprint,
making this a reliable tool for scoring high on the science section of the entrance exam.
Section 2: Exam Questions and Answers
Format: Multiple-choice science reasoning questions
• Four answer choices per question (A–D)
• Correct answer highlighted
• Includes brief explanations where applicable to reinforce key concepts
1. What is the primary source of energy for Earth's climate system?
(a) Geothermal heat
(b) The Sun
(c) Earth's core
(d) Tidal forces
The Sun
Explanation: The Sun provides the majority of energy driving Earth's climate through
solar radiation.
2. Which organelle is responsible for protein synthesis in a cell?
(a) Mitochondria
(b) Ribosomes
(c) Nucleus
(d) Golgi apparatus
Ribosomes
Explanation: Ribosomes are the sites where proteins are assembled from amino acids.
, 3. What gas is most abundant in Earth's atmosphere?
(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) Argon
Nitrogen
Explanation: Nitrogen constitutes about 78% of the atmosphere by volume.
4. Which of the following is a characteristic of all living organisms?
(a) Ability to photosynthesize
(b) Presence of a cell wall
(c) Reproduction
(d) Multicellular structure
Reproduction
Explanation: Reproduction is a fundamental property of all living organisms, whether
asexual or sexual.
5. What type of bond involves the sharing of electrons between atoms?
(a) Ionic bond
(b) Covalent bond
(c) Hydrogen bond
(d) Metallic bond
Covalent bond
Explanation: Covalent bonds form when atoms share pairs of electrons to achieve
stability.
6. Which part of the human brain is responsible for regulating balance and coordination?
(a) Cerebrum
(b) Cerebellum
(c) Brainstem
(d) Hypothalamus
Cerebellum
Explanation: The cerebellum controls balance, posture, and coordinated movements.
7. What is the primary function of red blood cells?
(a) Fight infection
(b) Transport oxygen
(c) Clot blood
Questions with 100% Accurate
Answers | A+ Graded | 2025/2026
Edition
Section 1: Introduction
This document provides a complete and verified set of science questions and answers for the
PAX (Pre-Admission Examination) NLN, updated for the 2025/2026 testing cycle. It covers
high-priority topics across biology, chemistry, physics, anatomy & physiology, microbiology,
and scientific reasoning—designed to assess readiness for nursing school admission. Each
answer is 100% accurate and A+ graded, aligned with the NLN PAX Science blueprint,
making this a reliable tool for scoring high on the science section of the entrance exam.
Section 2: Exam Questions and Answers
Format: Multiple-choice science reasoning questions
• Four answer choices per question (A–D)
• Correct answer highlighted
• Includes brief explanations where applicable to reinforce key concepts
1. What is the primary source of energy for Earth's climate system?
(a) Geothermal heat
(b) The Sun
(c) Earth's core
(d) Tidal forces
The Sun
Explanation: The Sun provides the majority of energy driving Earth's climate through
solar radiation.
2. Which organelle is responsible for protein synthesis in a cell?
(a) Mitochondria
(b) Ribosomes
(c) Nucleus
(d) Golgi apparatus
Ribosomes
Explanation: Ribosomes are the sites where proteins are assembled from amino acids.
, 3. What gas is most abundant in Earth's atmosphere?
(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) Argon
Nitrogen
Explanation: Nitrogen constitutes about 78% of the atmosphere by volume.
4. Which of the following is a characteristic of all living organisms?
(a) Ability to photosynthesize
(b) Presence of a cell wall
(c) Reproduction
(d) Multicellular structure
Reproduction
Explanation: Reproduction is a fundamental property of all living organisms, whether
asexual or sexual.
5. What type of bond involves the sharing of electrons between atoms?
(a) Ionic bond
(b) Covalent bond
(c) Hydrogen bond
(d) Metallic bond
Covalent bond
Explanation: Covalent bonds form when atoms share pairs of electrons to achieve
stability.
6. Which part of the human brain is responsible for regulating balance and coordination?
(a) Cerebrum
(b) Cerebellum
(c) Brainstem
(d) Hypothalamus
Cerebellum
Explanation: The cerebellum controls balance, posture, and coordinated movements.
7. What is the primary function of red blood cells?
(a) Fight infection
(b) Transport oxygen
(c) Clot blood
