Biology trivia

8 biology trivia questions, from easy to hard. Tap a question to see the answer. They're real questions from Rubicon, where you type the answer yourself and an AI judge reads what you meant.

This set covers Bacteria, Archaea & Viruses, Biotechnology & Genetic Engineering, Cells & Molecular Biology, Classification & the Tree of Life, DNA, Proteins & Biochemistry, Ecology & Ecosystems and Plants, Fungi & Diversity.

Questions and answers

  1. Easy Why do bacteria survive without a nucleus for genetic code?

    Their tiny size and simpler genetic material allow direct access to instructions without needing a walled compartment.

  2. Easy Why must new skin cells have the exact same instructions as old ones?

    They need the same genetic instructions so they can perform the exact same protective bodily functions properly.

  3. Easy Why do trees like maples shed their leaves before winter begins?

    Trees drop their leaves to prevent moisture loss and survive when frozen ground stops water absorption.

  4. Medium Why was Shinya Yamanaka's discovery of induced pluripotent stem cells considered revolutionary for medical biology?

    He showed that ordinary mature body cells can be reprogrammed backward into versatile embryonic-like cells.

  5. Medium Why are dolphins classified as mammals, rather than with sharks and other fish?

    Dolphins are mammals because they breathe air with lungs and nurse their young with milk.

  6. Medium When arranging a gene, a chromosome, and a nucleotide from smallest to largest, which order is correct?

    A nucleotide is the smallest unit, many nucleotides form a gene, and genes sit along a much larger chromosome.

  7. Hard Why did the rapid rise of biological oxygen trigger a catastrophic, worldwide ice age across the early Earth?

    Oxygen reacted with atmospheric methane, replacing a potent greenhouse gas with weaker carbon dioxide and cooling the entire planet drastically.

  8. Hard What biological mechanism directly causes cultured human cells to permanently stop dividing once they reach the famous Hayflick limit?

    Critically shortened telomeres trigger a permanent DNA damage response, halting cell division.

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