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National 5 Biology PRELIM Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What part of the cell controls all cell activities?✔✔Nucleus
What structure in plant cells is responsible for photosynthesis?✔✔Chloroplast
What type of cell division is used for growth and repair?✔✔Mitosis
What gas is required for aerobic respiration?✔✔Oxygen
What sugar is broken down in respiration to release energy?✔✔Glucose
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Which organ in the human body filters blood to remove waste?✔✔Kidney
What is the name of the pigment that gives leaves their green color?✔✔Chlorophyll
What type of molecule are enzymes made of?✔✔Proteins
Where does diffusion happen in the human lungs?✔✔Alveoli
What is the name of the process where water moves across a membrane?✔✔Osmosis
What is the main function of the red blood cells?✔✔To carry oxygen
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What part of the plant transports water from the roots to the leaves?✔✔Xylem
What is the function of guard cells in leaves?✔✔To control the opening and closing of stomata
What type of reproduction involves only one parent?✔✔Asexual reproduction
What process produces gametes in animals?✔✔Meiosis
What is the name of the female gamete in humans?✔✔Egg
What structure in the leaf allows gas exchange?✔✔Stomata
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What do we call a change in DNA that may lead to a new characteristic?✔✔Mutation
Which type of respiration does not require oxygen?✔✔Fermentation
What waste product is produced during fermentation in animal cells?✔✔Lactic acid
What is the term for the movement of molecules from high to low concentration?✔✔Diffusion
What part of a bacterial cell contains its genetic information?✔✔Circular chromosome
What is the first stage of genetic engineering?✔✔Identifying the required gene
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