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What holds the sides of the DNA ladder together?
Question 1:
What holds the sides of the DNA ladder together?
A.
Polar covalent bonds
B.
Ionic bonds
C.
Metallic bonds
D.
Covalent bonds
These questions are from this test. Would you like to take a practice test?
Practice Botany Online Test 3 | Englishfreetest.com
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10 questions
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