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Please help me with questions 17-20

If you can't do all of it plz just do one of it and tell me which answer goes with each question

Please help me with questions 17-20 If you can't do all of it plz just do one of it-example-1
User Pork
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18) DNA has three main companies 1. deoxyribose 2.base 3. phosphate. Made of two strands of nucleotides that are joined together by hydrogen bonding. Hope I could help (it's more detailed but just made it simple as I could )

User Mhorgan
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