DNA Can Be Visualized as a Ladder

question 11

Multiple Choice

DNA can be visualized as a ladder.Which parts would be the rungs (where you step) and which would be the stringers (the sides where you hold on) ?

• A) The sugars and bases are rungs,and the phosphates are stringers.
• B) The phosphates and bases are rungs,and the sugars are stringers.
• C) The H-bonded sugars are rungs,and the phosphate bases are stringers.
• D) The bases are rungs,and the sugars and phosphates are stringers.
• E) The bases are the rungs,and the sugars the stringers.

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