Biology WAEC past questions and answers

Biology WAEC past questions and answers

Here are 20 biology WAEC exam questions with options and answers:

What is the powerhouse of the cell?

a) Nucleus

b) Mitochondria

c) Chloroplast

d) Ribosome

Answer: b) Mitochondria

Which of the following is not a vertebrate?

a) Frog

b) Snake

c) Jellyfish

d) Eagle

Answer: c) Jellyfish

What is the chemical symbol for water?

a) H2O

b) CO2

c) NaCl

d) O2

Answer: a) H2O

Which gas do plants absorb from the atmosphere during photosynthesis?

a) Oxygen

b) Carbon dioxide

c) Nitrogen

d) Hydrogen

Answer: b) Carbon dioxide

In which part of the human digestive system are most nutrients absorbed?

a) Stomach

b) Small intestine

c) Large intestine

d) Esophagus

Answer: b) Small intestine

What is the largest organ in the human body?

a) Brain

b) Liver

c) Heart

d) Lungs

Answer: b) Liver

Which blood type is considered the universal donor?

a) A

b) B

c) AB

d) O

Answer: d) O

What is the process by which green plants make their own food using sunlight?

a) Respiration

b) Fermentation

c) Photosynthesis

d) Transpiration

Answer: c) Photosynthesis

Which gas is responsible for the greenhouse effect and global warming?

a) Oxygen

b) Carbon dioxide

c) Nitrogen

d) Hydrogen

Answer: b) Carbon dioxide

What is the smallest unit of life that can perform all the functions required for life?

a) Cell

b) Atom

c) Molecule

d) Tissue

Answer: a) Cell

Which organelle is responsible for protein synthesis in a cell?

a) Nucleus

b) Mitochondria

c) Ribosome

d) Endoplasmic reticulum

Answer: c) Ribosome

Which gas do humans primarily exhale during respiration?

a) Oxygen

b) Carbon dioxide

c) Nitrogen

d) Hydrogen

Answer: b) Carbon dioxide

What is the process of cell division that results in the formation of sex cells (sperm and egg)?

a) Mitosis

b) Meiosis

c) Cytokinesis

d) Interphase

Answer: b) Meiosis

Which of the following is a parasitic infection transmitted by mosquitoes?

a) Malaria

b) Tuberculosis

c) Influenza

d) Diabetes

Answer: a) Malaria

What is the role of white blood cells in the immune system?

a) Transport oxygen

b) Fight infections

c) Digest food

d) Produce antibodies

Answer: b) Fight infections

Which part of the flower is responsible for producing pollen?

a) Petal

b) Stamen

c) Pistil

d) Sepal

Answer: b) Stamen

What is the main function of the nervous system?

a) Circulation

b) Reproduction

c) Communication

d) Digestion

Answer: c) Communication

Which vitamin is synthesized by the skin when exposed to sunlight?

a) Vitamin A

b) Vitamin C

c) Vitamin D

d) Vitamin K

Answer: c) Vitamin D

What is the basic unit of heredity that carries genetic information?

a) Amino acid

b) Gene

c) Enzyme

d) Hormone

Answer: b) Gene

What is the process by which plants release water vapor into the atmosphere?

a) Transpiration

b) Photosynthesis

c) Respiration

d) Fermentation

Answer: a) Transpiration