Lesson 4.1.2.1

4.1.2.1 Chromosomes Quiz: AQA Biology, Unit 1

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 4.1.2.1, Chromosomes: 20 multiple choice questions for the AQA GCSE Biology (8461), Unit 1: Cell biology, written with Revision Ninja.

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The 20 questions

  1. What are chromosomes made of?

    • DNA
    • Protein only
    • Lipid molecules
    • Starch granules

  2. What do individual chromosomes carry large numbers of?

    • Ribosomes
    • Genes
    • Mitochondria
    • Gametes

  3. How are chromosomes normally arranged inside human body cells?

    • In rings
    • In triplets
    • As singles
    • In pairs

  4. Genes are located on:

    • Vacuoles
    • Cell walls
    • Ribosomes
    • Chromosomes

  5. A cell has 2 pairs of chromosomes. How many chromosomes are present in total?

    • 6
    • 8
    • 2
    • 4

  6. Which molecule do genes consist of?

    • Glucose
    • DNA
    • Amylase
    • Cellulose

  7. A human body cell has 23 pairs of chromosomes. How many chromosomes are in the cell?

    • 92
    • 69
    • 23
    • 46

  8. Each chromosome in a pair in body cells usually comes from:

    • A bacterium
    • The cell membrane
    • Neither parent
    • One parent

  9. What do two chromosomes in a homologous pair carry for the same characteristics?

    • Identical cells
    • Matching genes
    • Different proteins
    • Extra nuclei

  10. Which structure contains the chromosomes in a eukaryotic cell?

    • Cell membrane
    • Mitochondrion
    • Nucleus
    • Vacuole

  11. Which tool is used to help explain the complex stages of cell division?

    • Models and analogies
    • Chemical equations
    • Statistical tests
    • Flow charts

  12. What is the structure of the DNA molecule within a chromosome?

    • Coiled tightly
    • Short straight chain
    • Single ring
    • Unravelled sheet

  13. A cell has 8 chromosomes in its body cells. How many pairs are there?

    • 16
    • 8
    • 2
    • 4

  14. Where is a specific gene located on a chromosome?

    • At both ends
    • Everywhere randomly
    • In the membrane
    • At a specific position

  15. What can vary between the genes on a pair of matching chromosomes?

    • The DNA structure
    • The gene versions
    • The gene location
    • The chromosome length

  16. Which subcellular structure contains the chromosomes in an animal cell?

    • Nucleus
    • Ribosome
    • Mitochondrion
    • Cytoplasm

  17. Which sequence lists biological structures from smallest to largest size?

    • Gene, nucleus, chromosome
    • Nucleus, chromosome, gene
    • Gene, chromosome, nucleus
    • Chromosome, gene, nucleus

  18. Which type of molecule makes up a chromosome in a cell nucleus?

    • Glucose
    • RNA
    • Protein
    • DNA

  19. How are chromosomes normally arranged in human body cells?

    • In pairs
    • Single strands
    • In triplets
    • In quadruplets

  20. Which section of a chromosome carries the genetic code for a specific protein?

    • Nucleus
    • Gene
    • Ribosome
    • Gamete

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