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Combined Science — Biology Flashcards

6 cards from real O-LEVEL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Combined Science — Biology flashcards as text

  1. What is the basic unit of life?

    Answer: Cell

    The cell is the basic structural and functional unit of all living organisms. All life is made up of cells.

  2. Which organelle is responsible for producing energy (ATP) in the cell?

    Answer: Mitochondria

    Mitochondria are the sites of cellular respiration, producing ATP (adenosine triphosphate), the cell's energy currency.

  3. What is the process by which plants make their own food?

    Answer: Photosynthesis

    Photosynthesis is the process by which plants use light energy, carbon dioxide, and water to produce glucose and oxygen.

  4. Which blood cells are responsible for fighting infection?

    Answer: White blood cells

    White blood cells (leukocytes) are part of the immune system, fighting infections by engulfing pathogens or producing antibodies.

  5. What is the word equation for aerobic respiration?

    Answer: Glucose + oxygen → carbon dioxide + water + energy

    Aerobic respiration: Glucose + Oxygen → Carbon dioxide + Water + Energy (ATP). This occurs in the mitochondria.

  6. What is the function of chlorophyll?

    Answer: To absorb sunlight for photosynthesis

    Chlorophyll is the green pigment in chloroplasts that absorbs light energy (mainly red and blue wavelengths) for use in photosynthesis.

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