NATIONAL BOARD EXAMINATION (NBE) – SCIENCES EXAMS – QUESTIONS AND
ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | PLUS RATIONALES |
GUARANTEED PASS | LATEST EXAM UPDATE
CORE DOMAINS*
• Biology*
• Chemistry*
• Physics*
• Environmental Science*
• Scientific Research Methods*
• Laboratory Safety and Ethics*
, • Human Anatomy and Physiology*
• Genetics and Biotechnology*
• Ecology and Conservation Science*
• Scientific Data Interpretation*
INTRODUCTION*
The National Board Examination (NBE) – Sciences Exams is desi
SECTION ONE (QUESTIONS 1–50)
1. Which organelle is primarily responsible for energy production in eukaryotic cells?
A. Ribosome
B. Mitochondrion
C. Golgi apparatus
D. Lysosome
,🟢 Correct Answer: B. Mitochondrion
🔴 Explanation: Mitochondria generate ATP through cellular respiration and are known as
the powerhouse of the cell.
2. What is the SI unit of force?
A. Joule
B. Watt
C. Newton
D. Pascal
🟢 Correct Answer: C. Newton
🔴 Explanation: The SI unit of force is the Newton (N), defined as the force required to
accelerate 1 kg by 1 m/s².
3. Which gas is most abundant in Earth’s atmosphere?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Hydrogen
🟢 Correct Answer: B. Nitrogen
, 🔴 Explanation: Nitrogen makes up approximately 78% of Earth’s atmosphere.
4. A scientist repeats an experiment several times to improve reliability. What principle is
being applied?
A. Randomization
B. Replication
C. Calibration
D. Observation
🟢 Correct Answer: B. Replication
🔴 Explanation: Replication improves consistency and reliability of scientific findings.
5. Which blood vessels carry blood away from the heart?
A. Veins
B. Capillaries
C. Arteries
D. Venules
🟢 Correct Answer: C. Arteries
🔴 Explanation: Arteries transport blood away from the heart to body tissues.
6. What is the chemical symbol for sodium?
ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | PLUS RATIONALES |
GUARANTEED PASS | LATEST EXAM UPDATE
CORE DOMAINS*
• Biology*
• Chemistry*
• Physics*
• Environmental Science*
• Scientific Research Methods*
• Laboratory Safety and Ethics*
, • Human Anatomy and Physiology*
• Genetics and Biotechnology*
• Ecology and Conservation Science*
• Scientific Data Interpretation*
INTRODUCTION*
The National Board Examination (NBE) – Sciences Exams is desi
SECTION ONE (QUESTIONS 1–50)
1. Which organelle is primarily responsible for energy production in eukaryotic cells?
A. Ribosome
B. Mitochondrion
C. Golgi apparatus
D. Lysosome
,🟢 Correct Answer: B. Mitochondrion
🔴 Explanation: Mitochondria generate ATP through cellular respiration and are known as
the powerhouse of the cell.
2. What is the SI unit of force?
A. Joule
B. Watt
C. Newton
D. Pascal
🟢 Correct Answer: C. Newton
🔴 Explanation: The SI unit of force is the Newton (N), defined as the force required to
accelerate 1 kg by 1 m/s².
3. Which gas is most abundant in Earth’s atmosphere?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Hydrogen
🟢 Correct Answer: B. Nitrogen
, 🔴 Explanation: Nitrogen makes up approximately 78% of Earth’s atmosphere.
4. A scientist repeats an experiment several times to improve reliability. What principle is
being applied?
A. Randomization
B. Replication
C. Calibration
D. Observation
🟢 Correct Answer: B. Replication
🔴 Explanation: Replication improves consistency and reliability of scientific findings.
5. Which blood vessels carry blood away from the heart?
A. Veins
B. Capillaries
C. Arteries
D. Venules
🟢 Correct Answer: C. Arteries
🔴 Explanation: Arteries transport blood away from the heart to body tissues.
6. What is the chemical symbol for sodium?
