WAEC Biology

OBJECTIVES 1. In cellular respiration energy is made available to organisms by A. removal of a phosphate group from ADP. B. breaking off a phosphate group from ATP. C. adding a phosphate group to glucose. D. breaking off a hydrogen ion from NADPH. 2. Respiration is an essential life process…

OBJECTIVES 1. Pepsin is secreted as an inactive precursor called pepsinogen because A. pepsin as an enzyme is quickly destroyed by the alkaline food from the mouth. B. all digestive enzymes pass through a precursor stage. C. pepsin is a proteolytic enzyme and might attack the stomach tissues. D. pepsin…

OBJECTIVES The diagrams below are illustrations of the dentition of an organism. Study them and answer questions 1 to 3. 1. The dentition belongs to A. rabbit. B. cat. C. Frog. D. man. 2. The function of the teeth  labeled X is for A. biting and grasping. B. chewing and…

OBJECTIVES 1. A meal consisting of yam and a lot of vegetables is not balanced because it does not contain A. minerals B. proteins. C. vitamins. D. carbohydrates. 2. In a Biuret test, some protein was mixed with sodium hydroxide solution. Which of the following chemicals should be added to…

OBJECTIVES 1. Analysis of the gut content of an animal showed that it contained small pieces of bone, seeds, roughage and insects. The animal is likely to be a/an A. carnivore. B. herbivore C. insectivore. D. omnivore. 2. A beaker of pond water containing few specimens of Euglena was placed…

OBJECTIVES 1. Pond weeds normally lack thick layers of cuticle because A. their system of photosynthesis is not efficient. B. there is no danger of becoming desiccated. C. their leaves are either dissected or ribbon-shape. D. there are numerous stomata on their upper epidermis. 2. The overall reaction in glycolysis…

OBJECTIVES 5. The opening of the guard cells of the epidermis in plants is by the process of A. osmosis. B. diffusion. C. active transport. D. transpiration. 6. When a spirogira filament is placed in a concentrated salt solution for 30 minutes, the cell would become A. plasmolysed. B. turgid.…