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Which step happens first to a chromosome during cell division?

A. Nucleotides are added to each half of a DNA molecule.
B. A DNA molecule unwinds, exposing the bases on each half.
C. Each half of a DNA molecule acts as a template.
D. Two identical DNA molecules form.

2 Answers

4 votes

Answer:

B

Step-by-step explanation:

User Victor Axelsson
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(b) a dna molecule unwinds, exposing the bases on each half

User Steve Breese
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