DNA Structure and Composition
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Questions and Answers

What is the primary structure of DNA?

  • Single strand
  • Triple helix
  • Double helix (correct)
  • Linear structure
  • Which nucleotide does not pair with Adenine in DNA?

  • Cytosine (correct)
  • Thymine
  • Adenine
  • Guanine
  • What components make up a nucleotide?

  • Two sugars and one phosphate group
  • A sugar, ribose, and two organic bases
  • A lipid, a phosphate group, and one organic base
  • A sugar, a phosphate group, and one organic base (correct)
  • How many base pairs do humans approximately have in their DNA?

    <p>3 billion</p> Signup and view all the answers

    What is a key feature of the base sequence in DNA?

    <p>It determines the genetic information</p> Signup and view all the answers

    Study Notes

    DNA Structure

    • DNA has a double helix structure
    • It's composed of four nucleotides
    • The order of base pairs (the base sequence) determines genetic information

    Nucleotide Composition

    • A sugar
    • Deoxyribose
    • A phosphate group
    • One of four bases

    Organic Bases

    • Adenine (A)
    • Thymine (T)
    • Cytosine (C)
    • Guanine (G)

    DNA Single Strand

    • Nucleotides link to form a chain
    • This chain is called a base sequence
    • The base sequence varies between living organisms (genetic fingerprint)

    Complementary Bases

    • Adenine pairs with Thymine
    • Cytosine pairs with Guanine

    DNA Double Helix

    • DNA is a double helix
    • It is formed from two complementary DNA strands
    • Humans have approximately 3 billion base pairs in their DNA

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    Description

    Explore the intricate structure of DNA, including its double helix formation and nucleotide composition. Understand the role of organic bases like adenine, thymine, cytosine, and guanine in storing genetic information. This quiz covers essential concepts related to the building blocks of life.

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