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Double-Stranded DNA Looks Like a Ladder That Has Been Twisted

Question 139

Multiple Choice

Double-stranded DNA looks like a ladder that has been twisted into a helix or spiral.The side supports of the ladder are


A) individual nitrogenous bases.
B) alternating bases and sugars.
C) alternating bases and phosphate groups.
D) alternating sugars and phosphates.
E) alternating bases, sugars, and phosphates.

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