WAEC Biology Practice Questions & Explanations
Try 20 of 200+ WAEC Biology questions as a free quiz — select your answers, submit, and see your score with a full explanation for every one.
- 1.The basic structural and functional unit of life is the
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The cell is the smallest unit capable of carrying out all life processes and is therefore regarded as the basic unit of life. - 2.Which of the following structures controls the activities of the cell?
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The nucleus contains genetic material (DNA) and controls the growth, metabolism, and reproduction of the cell. - 3.The cell membrane is primarily responsible for
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The cell membrane is selectively permeable, allowing some substances to enter or leave while restricting others. - 4.Which organelle is known as the powerhouse of the cell?
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Mitochondria release energy from food through cellular respiration and produce ATP for cellular activities. - 5.Photosynthesis occurs in the
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Chloroplasts contain chlorophyll, which traps sunlight for photosynthesis. - 6.Which of the following is present in plant cells but absent in animal cells?
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Plant cells possess a cellulose cell wall that provides support and protection, whereas animal cells do not. - 7.The jelly-like substance in which cell organelles are suspended is called
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The cytoplasm is a semi-fluid medium that contains organelles and serves as the site of many metabolic reactions. - 8.Protein synthesis takes place on the
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Ribosomes are the sites where amino acids are assembled into proteins according to genetic instructions. - 9.The large central vacuole in plant cells mainly functions in
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The vacuole stores water, dissolved substances, and helps maintain the rigidity of plant cells. - 10.Which organelle modifies, packages, and transports proteins within the cell?
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The Golgi apparatus processes proteins and packages them into vesicles for transport. - 11.Which structure contains hereditary materials in the form of genes?
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Chromosomes are thread-like structures made of DNA and proteins that carry genes. - 12.Cells that lack a true nucleus are described as
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Prokaryotic cells do not possess a membrane-bound nucleus. Examples include bacteria. - 13.The movement of water molecules across a selectively permeable membrane from a region of higher water concentration to a region of lower water concentration is called
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Osmosis is the movement of water molecules through a selectively permeable membrane down a water concentration gradient. - 14.Which of the following organelles contains digestive enzymes capable of breaking down worn-out cell parts?
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Lysosomes contain enzymes that digest damaged organelles and foreign materials within the cell. - 15.One major difference between plant and animal cells is that plant cells
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Plant cells possess chloroplasts containing chlorophyll, which enables photosynthesis. Animal cells do not. - 16.The endoplasmic reticulum primarily functions in
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The endoplasmic reticulum forms a network of membranes involved in transporting materials and synthesizing proteins and lipids. - 17.Which cell organelle is directly responsible for aerobic respiration?
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Aerobic respiration occurs in the mitochondria where energy is released from food molecules. - 18.The nucleolus is mainly involved in the production of
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The nucleolus synthesizes ribosomal RNA and helps in the formation of ribosomes. - 19.Which of the following cell structures is non-living?
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The cell wall is a non-living structure secreted by the cell, while the other options are living components of the cell. - 20.A red blood cell is adapted to its function by lacking a nucleus mainly to
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Mature red blood cells lose their nucleus to create more space for haemoglobin, thereby increasing oxygen-carrying capacity.
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