DNA Base Pairings
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Objective
I can describe DNA has different bases that link up with one another
Part 1 of 4
Warm-up video
Science ABC · 5:23Vetted channel
We don't generate video — this one is by Science ABC on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 4
Key concepts
3 concepts
- 1
DNA is a giant molecule that looks like a twisted ladder.
- 2
The rungs of the DNA ladder are made of four letters: A, T, G, and C.
- 3
The cell's library, called the nucleus, holds the DNA, which tells the cell how to make proteins.
Part 3 of 4
Practice
3 questions
DNA is like a twisted ladder. What are the 'rungs' (the steps) of the ladder made of?
Which chemical letter always pairs with the letter A?
Part 4 of 4
Exit ticket
Quick comprehension check
“DNA has four letters: A, T, C, and G. Which letter does A always link with?”
Sample answer included in the free materials
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