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Biology — Intermediate

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  • •Read every question carefully before answering. Some questions include subtle wording that changes the correct answer.
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  • •After each answer, read the explanation. Even correct answers often include useful context you might not know.
  • •Come back tomorrow for a brand new quiz on the same topic. Daily practice is the most effective way to retain what you learn.
IntermediateScience
Today's questions

Today's quiz questions

These are the questions that make up today's quiz. Test your knowledge, see how much you know, and learn from the explanation behind every answer.

  1. 1.What is the function of the cell membrane?

    • •To regulate what enters and exits the cell, maintaining homeostasis
    • •To store the cell's genetic material
    • •To provide rigid structural support for the cell
    • •To generate energy for cellular processes

  2. 2.What is osmosis?

    • •The movement of solute molecules from high to low concentration
    • •The diffusion of gases in the lungs
    • •The movement of water molecules from a region of lower solute concentration to higher through a semipermeable membrane
    • •The active transport of ions across a cell membrane

  3. 3.What is the largest organ in the human body?

    • •The liver
    • •The skin
    • •The lungs
    • •The intestine

  4. 4.What is the process of transcription in genetics?

    • •The synthesis of mRNA from a DNA template by RNA polymerase
    • •The repair of damaged DNA sequences
    • •The copying of DNA before cell division
    • •The assembly of amino acids into a protein chain

  5. 5.What is the structure of DNA?

    • •A double helix of two antiparallel strands connected by complementary base pairs (A-T, G-C)
    • •Two parallel protein chains held together by hydrogen bonds
    • •A single strand of nucleotides forming a circular molecule
    • •A triple helix of sugar-phosphate backbones

  6. 6.What is the role of enzymes in biochemical reactions?

    • •They provide energy for reactions to proceed
    • •They slow down reactions to prevent cellular damage
    • •They speed up reactions by lowering activation energy
    • •They are consumed during the reaction they catalyze

  7. 7.What is the function of the Golgi apparatus?

    • •To modify, sort, and package proteins and lipids
    • •To produce ATP through cellular respiration
    • •To break down old organelles and waste materials
    • •To store genetic information in the cell

  8. 8.What is the basic unit of life?

    • •The tissue
    • •The atom
    • •The cell
    • •The molecule

  9. 9.What is the difference between aerobic and anaerobic respiration?

    • •Both produce the same amount of ATP but at different rates
    • •Aerobic uses oxygen and yields more ATP; anaerobic does not and yields less
    • •Aerobic occurs in bacteria; anaerobic in human cells
    • •Aerobic produces alcohol; anaerobic produces CO2

  10. 10.Which structure of the eye focuses light on the retina?

    • •Cornea
    • •Pupil
    • •Lens
    • •Iris