BIOLOGY (BIOD 121) EXAM LATEST 2026 UPDATE
100 QUESTIONS AND DETAILED VERIFIED ANSWERS
FROM ACTUAL EXAMS TEST GRADE A+
1. What is the basic unit of life?
A. Tissue
B. Organ
C. Cell
D. System
Answer: C. Cell
Rationale: The cell is the smallest structural and functional unit of all living
organisms.
2. Which organelle is responsible for energy production?
A. Nucleus
B. Ribosome
C. Mitochondria
D. Golgi body
Answer: C. Mitochondria
Rationale: Mitochondria produce ATP through cellular respiration.
3. DNA is found in which part of the cell?
A. Cytoplasm
B. Nucleus
C. Ribosome
D. Vacuole
,Answer: B. Nucleus
Rationale: In eukaryotic cells, DNA is stored in the nucleus.
4. Which process produces glucose in plants?
A. Respiration
B. Photosynthesis
C. Fermentation
D. Digestion
Answer: B. Photosynthesis
Rationale: Photosynthesis converts light energy into glucose.
5. The powerhouse of the cell is:
A. Nucleus
B. Mitochondria
C. Chloroplast
D. Lysosome
Answer: B. Mitochondria
Rationale: Mitochondria generate most of the cell’s ATP.
6. Which biomolecule stores genetic information?
A. Protein
B. Lipid
C. DNA
D. Carbohydrate
Answer: C. DNA
Rationale: DNA carries hereditary information.
7. Osmosis is the movement of:
, A. Solutes
B. Water
C. Oxygen
D. Proteins
Answer: B. Water
Rationale: Osmosis is diffusion of water across a semi-permeable membrane.
8. Which blood cells fight infection?
A. Red blood cells
B. Platelets
C. White blood cells
D. Plasma
Answer: C. White blood cells
Rationale: WBCs defend the body against pathogens.
9. The site of protein synthesis is:
A. Nucleus
B. Ribosome
C. Lysosome
D. Vacuole
Answer: B. Ribosome
Rationale: Ribosomes assemble amino acids into proteins.
10. Which gas is required for respiration?
A. Carbon dioxide
B. Oxygen
C. Nitrogen
D. Hydrogen
100 QUESTIONS AND DETAILED VERIFIED ANSWERS
FROM ACTUAL EXAMS TEST GRADE A+
1. What is the basic unit of life?
A. Tissue
B. Organ
C. Cell
D. System
Answer: C. Cell
Rationale: The cell is the smallest structural and functional unit of all living
organisms.
2. Which organelle is responsible for energy production?
A. Nucleus
B. Ribosome
C. Mitochondria
D. Golgi body
Answer: C. Mitochondria
Rationale: Mitochondria produce ATP through cellular respiration.
3. DNA is found in which part of the cell?
A. Cytoplasm
B. Nucleus
C. Ribosome
D. Vacuole
,Answer: B. Nucleus
Rationale: In eukaryotic cells, DNA is stored in the nucleus.
4. Which process produces glucose in plants?
A. Respiration
B. Photosynthesis
C. Fermentation
D. Digestion
Answer: B. Photosynthesis
Rationale: Photosynthesis converts light energy into glucose.
5. The powerhouse of the cell is:
A. Nucleus
B. Mitochondria
C. Chloroplast
D. Lysosome
Answer: B. Mitochondria
Rationale: Mitochondria generate most of the cell’s ATP.
6. Which biomolecule stores genetic information?
A. Protein
B. Lipid
C. DNA
D. Carbohydrate
Answer: C. DNA
Rationale: DNA carries hereditary information.
7. Osmosis is the movement of:
, A. Solutes
B. Water
C. Oxygen
D. Proteins
Answer: B. Water
Rationale: Osmosis is diffusion of water across a semi-permeable membrane.
8. Which blood cells fight infection?
A. Red blood cells
B. Platelets
C. White blood cells
D. Plasma
Answer: C. White blood cells
Rationale: WBCs defend the body against pathogens.
9. The site of protein synthesis is:
A. Nucleus
B. Ribosome
C. Lysosome
D. Vacuole
Answer: B. Ribosome
Rationale: Ribosomes assemble amino acids into proteins.
10. Which gas is required for respiration?
A. Carbon dioxide
B. Oxygen
C. Nitrogen
D. Hydrogen
