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PAX Biology Flashcards

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

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  1. Which organelle is known as the 'powerhouse of the cell'?

    Answer: Mitochondria

    Mitochondria produce ATP through cellular respiration, providing the cell with energy.

  2. What is the function of red blood cells (erythrocytes)?

    Answer: Transport oxygen

    Red blood cells contain hemoglobin, which binds oxygen and transports it throughout the body.

  3. Which type of cell division produces gametes (sex cells)?

    Answer: Meiosis

    Meiosis is the specialized cell division that produces haploid gametes (sperm and eggs) with half the normal chromosome number.

  4. What is the role of DNA in a cell?

    Answer: Store genetic information

    DNA stores the genetic blueprint that directs the synthesis of proteins and controls cell functions.

  5. Which of the following is NOT a function of the liver?

    Answer: Pumping blood

    Pumping blood is the function of the heart; the liver detoxifies, produces bile, and stores glycogen.

  6. What type of tissue covers body surfaces and lines internal organs?

    Answer: Epithelial tissue

    Epithelial tissue forms the outer covering of the body and the lining of internal cavities and organs.

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Sources & references

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  1. nln.org — Eligibility, test delivery, passing score, test dates, score validity, fees, retake policy, score release, exam information · verified Oct 2026