DNA Base Pairings

1st Grade•30 minutes

Learning Objective

I can describe DNA has different bases that link up with one another

DNA is a giant molecule that looks like a twisted ladder.

The rungs of the DNA ladder are made of four letters: A, T, G, and C.

The cell's library, called the nucleus, holds the DNA, which tells the cell how to make proteins.

This lesson includes 3 practice questions to reinforce learning.

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1. DNA is like a twisted ladder. What are the 'rungs' (the steps) of the ladder made of?

2. Which chemical letter always pairs with the letter A?

3. If one side of a DNA ladder has the letter C, what letter will be on the other side?

What is DNA and How Does it Work?

Science ABC