NLN NEX (Nursing Entrance Exam) Science Exam LATEST 2026 UPDATE WITH COMPLETE QUESTIONS AND CORRECTLY WELL DEFINED ANSWERS 100%GUARANTEED PASS!!! NLN Nursing Entrance Exam (NEX)

NLN NEX (Nursing Entrance Exam) Science Exam LATEST
2026 UPDATE WITH COMPLETE QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
100%GUARANTEED PASS!!! NLN Nursing Entrance Exam
(NEX)



NLN NURSING ENTRANCE EXAM (NEX)
COMPREHENSIVE PRACTICE EXAMINATION
150 Questions with Detailed Answer Explanations
Covers All Major Content Areas: Biology, Chemistry, Health, and Anatomy &
Physiology


INSTRUCTIONS
• This examination contains 150 multiple-choice questions designed to
simulate the actual NLN NEX format.
• You have 3 hours to complete all questions.
• Select the single best answer for each question.
• Answers and detailed explanations are provided at the end of each section.
• This exam covers: General Biology, Cell Structure and Function, Human
Anatomy and Physiology, Chemistry, and Health Concepts.


PART I: GENERAL BIOLOGY AND CELL STRUCTURE
(Questions 1-35)

,QUESTION 1
Which of the following represents the correct hierarchical order of biological
organization from simplest to most complex?
A) Organism → Organ System → Organ → Tissue → Cell
B) Cell → Tissue → Organ → Organ System → Organism
C) Tissue → Cell → Organ → Organ System → Organism
D) Cell → Organ → Tissue → Organ System → Organism


ANSWER-: B) Cell → Tissue → Organ → Organ System → Organism
EXPLANATION: The levels of organization proceed from the simplest to the most
complex:
• Cell: Basic unit of life
• Tissue: Group of similar cells performing a common function
• Organ: Various tissues combined for a specialized function
• Organ System: Number of organs working together
• Organism: Highest level, such as the human body


QUESTION 2
The organelle that contains genetic information (DNA) and controls the activities
of the cell is the:
A) Ribosome
B) Mitochondria
C) Nucleus
D) Golgi complex


ANSWER-: C) Nucleus
EXPLANATION:

, • Nucleus: Contains DNA in the form of chromatin/chromosomes; controls all
cellular activities
• Ribosome: Site of protein synthesis
• Mitochondria: Powerhouse of the cell, produces ATP
• Golgi complex: Modifies, sorts, and packages proteins


QUESTION 3
Which organelle is responsible for protein synthesis in the cell?
A) Lysosome
B) Ribosome
C) Vacuole
D) Smooth ER


ANSWER-: B) Ribosome
EXPLANATION:
• Ribosomes: The sites of protein synthesis; can be free in cytoplasm or
attached to rough ER
• Lysosomes: Contain digestive enzymes
• Vacuoles: Storage compartments
• Smooth ER: Lipid synthesis, detoxification, calcium storage


QUESTION 4
During cell division, DNA condenses into visible rod-shaped structures called:
A) Chromatin
B) Chromosomes
C) Nucleotides
D) Genes

, ANSWER-: B) Chromosomes
EXPLANATION:
• Chromosomes: Condensed, rod-shaped bodies of DNA visible during cell
division
• Chromatin: Loosely structured DNA when cell is NOT dividing
• Nucleotides: Building blocks of DNA
• Genes: Segments of DNA that code for specific traits


QUESTION 5
The semipermeable membrane that separates the contents of the cell from the
surrounding fluid is the:
A) Cell wall
B) Nuclear membrane
C) Plasma (cell) membrane
D) Cytoplasm


ANSWER-: C) Plasma (cell) membrane
EXPLANATION:
• Plasma membrane: Semipermeable barrier that controls what enters and
exits the cell
• Cell wall: Rigid outer layer in plant cells (not semipermeable)
• Nuclear membrane: Surrounds the nucleus
• Cytoplasm: Fluid matrix inside the cell