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What is the structure of DNA?

Practice Questions

Q1
What is the structure of DNA?
  1. Single-stranded
  2. Double helix
  3. Triple helix
  4. Linear

Questions & Step-by-Step Solutions

What is the structure of DNA?
  • Step 1: DNA stands for Deoxyribonucleic Acid.
  • Step 2: DNA is made up of smaller units called nucleotides.
  • Step 3: Each nucleotide has three parts: a sugar, a phosphate group, and a nitrogen base.
  • Step 4: There are four types of nitrogen bases in DNA: adenine (A), thymine (T), cytosine (C), and guanine (G).
  • Step 5: The structure of DNA is shaped like a twisted ladder, which is called a double helix.
  • Step 6: The two strands of DNA are held together by pairs of nitrogen bases: A pairs with T, and C pairs with G.
  • Step 7: The sugar and phosphate make up the sides of the ladder, while the base pairs form the rungs.
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