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24 votes
24 votes
Sample 1
sample 2
sample 3
sample 4

Sample 1 sample 2 sample 3 sample 4-example-1
User Claytron
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1 Answer

28 votes
28 votes

Answer:

Sample 1

Step-by-step explanation:

Dna contains carbon, hydrogen, oxygen, nitrogen, and phosphorus. These make up the sugar-phosphate backbone of the DNA also known as the sides of the ladder.

User Jay Wick
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