Question

From which substances each rail of the DNA ladder is made up of?
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Answer 1

Explanation:

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Answer 2

The rails of the DNA strand are made up of deoxyribose (a sugar) and phosphoric acid. These two molecules alternate one after the other the entire length of the rail. The rungs of the DNA strand are made up of organic bases. These organic bases attach to the deoxyribose on the ladder rails.