3. The "rungs" or steps of the DNA ladder are
made of_________
while the sides of
DNA ladder are composed of__________.
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3. The "rungs" or steps of the DNA ladder are
made of_________
while the sides of
DNA ladder are composed of__________.
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Answer:
The shape of DNA is a double helix, which is like a twisted ladder. The sides of the ladder are made of alternating sugar and phosphate molecules. The sugar is deoxyribose. The rungs of the ladder are pairs of 4 types of nitrogen bases.
Four different types of nitrogenous bases are found in DNA: adenine (A), thymine (T), cytosine (C), and guanine (G).