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ElenaW [278]
3 years ago
12

Ive tried to answer them but I don't understand

Biology
1 answer:
solniwko [45]3 years ago
4 0
10) idk lol sorry!

11) The two purines in DNA are adenine and guanine.

12) Nucleotides. 

13) It has the ability to turn off genes.

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