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Semenov [28]
3 years ago
13

2. DNA

Biology
2 answers:
Zepler [3.9K]3 years ago
8 0

Answer:

b

Explanation:

Troyanec [42]3 years ago
6 0

Answer:

D.

Explanation:

Dna is made of amino acids ,cannot be repaired if mutated and is a twisted ladder structure.

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