Question

The rungs of the DNA ladder are made of:

1) Glucose and sugars

2) Base pairs

3) Phosphates and hydrogen

4) Sugars and phosphates

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Answer 1

They are made of 2) base pairs

Step-by-step explanation:

Answer 2

2. Base Pairs

Step-by-step explanation:

The rungs of DNA are made up of nitrogenous bases: adenine, thymine, guanine and cytosine. Adenine pairs with thymine, and cytosine pairs with guanine.

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