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?

A) RNA

B) DNA

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