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The structure of DNA
Describe DNA's double helix and base-pairing rules, and trace how Franklin, Watson and Crick's work revealed its structure.
⏱ 19 min❓ 9 questions
What you'll be able to do
- ✔I can describe the structure of a nucleotide and of the DNA double helix
- ✔I can use the base-pairing rules to write a complementary strand and calculate base percentages
- ✔I can explain how evidence from several scientists led to the double-helix model
How this works
- 1Read the short explanations first — they teach you what you need before each question.
- 2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
- 3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.
What's inside
9 questions and 1 quick teaching card, including:
- 🔘Multiple choice — Tap the answer you think is best, then check it.
- ✏️Fill in the blank — Type the missing word to complete the sentence.
👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.
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Curriculum: AC9S10U01, AC9S10H01