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Biology WAEC Past Questions and Answers

Biology WAEC Past Questions and Answers

What is the powerhouse of the cell?

A) Nucleus
B) Mitochondrion
C) Endoplasmic reticulum
D) Golgi apparatus
Answer: B) Mitochondrion
Which molecule stores genetic information in a cell?

C) Proteins
D) Lipids
Answer: B) DNA
What is the primary function of red blood cells?

A) Oxygen transport
B) Immune defense
C) Nutrient absorption
D) Blood clotting
Answer: A) Oxygen transport
Which process is responsible for the production of proteins in a cell?

A) Photosynthesis
B) Respiration
C) Translation
D) Transcription
Answer: C) Translation
What is the largest organ in the human body?

A) Liver
B) Brain
C) Skin
D) Heart
Answer: C) Skin
Which organelle is responsible for detoxifying harmful substances in a cell?

A) Lysosome
B) Peroxisome
C) Vacuole
D) Ribosome
Answer: B) Peroxisome
What is the main function of the chloroplast in plant cells?

A) Energy production
B) Photosynthesis
C) Protein synthesis
D) Lipid storage
Answer: B) Photosynthesis
Which type of cell division produces gametes (sperm and egg cells)?

A) Mitosis
B) Meiosis
C) Binary fission
D) Budding
Answer: B) Meiosis
What is the role of insulin in the human body?

A) Stimulating growth
B) Regulating blood sugar
C) Enhancing immunity
D) Controlling body temperature
Answer: B) Regulating blood sugar
Which gas do plants primarily take in during photosynthesis?

A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Hydrogen
Answer: B) Carbon dioxide
What is the basic unit of heredity in living organisms?

A) Gene
B) Chromosome
C) Allele
D) Nucleotide
Answer: A) Gene
Which system is responsible for transporting nutrients and oxygen to cells in the body?

A) Nervous system
B) Respiratory system
C) Circulatory system
D) Digestive system
Answer: C) Circulatory system
What is the function of the Golgi apparatus in a cell?

A) Protein synthesis
B) Energy production
C) Cellular respiration
D) Packaging and modifying proteins
Answer: D) Packaging and modifying proteins
Which type of tissue connects muscle to bone in the human body?

A) Epithelial tissue
B) Connective tissue
C) Nervous tissue
D) Muscle tissue
Answer: B) Connective tissue
What is the purpose of the Krebs cycle in cellular respiration?

A) ATP production
B) Carbon dioxide release
C) Glycolysis
D) Oxygen absorption
Answer: B) Carbon dioxide release
Which enzyme is responsible for breaking down carbohydrates in the digestive system?

A) Amylase
B) Lipase
C) Protease
D) Helicase
Answer: A) Amylase
What is the function of white blood cells in the immune system?

A) Blood clotting
B) Oxygen transport
C) Fighting infections
D) Nutrient absorption
Answer: C) Fighting infections
Which structure in a plant cell provides rigidity and support?

A) Vacuole
B) Cell membrane
C) Cell wall
D) Chloroplast
Answer: C) Cell wall
What is the process by which plants make their own food using sunlight?

A) Respiration
B) Photosynthesis
C) Fermentation
D) Oxidation
Answer: B) Photosynthesis
Which hormone is responsible for regulating the sleep-wake cycle in humans?

A) Insulin
B) Melatonin
C) Estrogen
D) Testosterone
Answer: B) Melatonin


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