3.1.1 Structure of DNA

Cards (80)

  • What does DNA stand for?
    Deoxyribonucleic acid
  • DNA carries the hereditary information in living organisms
  • DNA directs protein synthesis through the genetic code
  • RNA uses uracil instead of thymine
  • What are the four nitrogenous bases in DNA?
    Adenine, Thymine, Cytosine, Guanine
  • The sugar in DNA is ribose, while the sugar in RNA is deoxyribose.
    False
  • What biological process does DNA direct through the genetic code?
    Protein synthesis
  • DNA is composed of nucleotides, each containing a sugar, a phosphate group, and a nitrogenous base
  • The four nitrogenous bases in DNA are adenine, thymine, cytosine, and guanine
  • What is the role of the phosphate group in DNA?
    Links nucleotides together
  • The phosphate group in DNA links nucleotides together in the DNA backbone.

    True
  • Match the nitrogenous base with its complementary base in DNA:
    Adenine ↔️ Thymine
    Cytosine ↔️ Guanine
  • Hydrogen bonds hold complementary base pairs together in DNA.

    True
  • Which nitrogenous bases are found in DNA but not in RNA?
    Thymine
  • What is the role of the phosphate group in DNA?
    Links nucleotides together
  • The sequence of nitrogenous bases in DNA encodes genetic information.
    True
  • What are the four nitrogenous bases found in DNA?
    A, T, C, G
  • What is the primary structural difference between purines and pyrimidines?
    Double-ring vs single-ring
  • Match the purine base with its complementary pyrimidine base:
    Adenine (A) ↔️ Thymine (T)
    Guanine (G) ↔️ Cytosine (C)
  • DNA directs protein synthesis through the genetic code
  • DNA is the genetic material that carries hereditary information.

    True
  • The phosphate group connects the deoxyribose sugars in the DNA backbone
  • The deoxyribose sugar is a 5-carbon sugar that forms the backbone of DNA.

    True
  • Adenine and guanine are purines.

    True
  • Purines always pair with pyrimidines in DNA.

    True
  • The sugar-phosphate backbone forms the outer framework of the DNA double helix
  • The twisted shape of DNA resembles a spiral staircase.
    True
  • What type of sugar is found in DNA nucleotides?
    Deoxyribose
  • RNA uses deoxyribose as its sugar molecule.
    False
  • What type of bonds hold together the two strands of DNA's double helix structure?
    Hydrogen bonds
  • What does DNA stand for?
    Deoxyribonucleic acid
  • Which nitrogenous base is unique to RNA?
    Uracil
  • What is the primary function of DNA?
    Genetic information storage
  • What is the sugar molecule found in DNA nucleotides?
    Deoxyribose
  • A DNA nucleotide contains a sugar, a phosphate group, and one of four nitrogenous bases
  • The sugar in DNA is deoxyribose, a 5-carbon sugar
  • Deoxyribose is a 5-carbon sugar
  • What are the key differences between DNA and RNA?
    Sugar, bases, structure, function
  • DNA has a double helix structure, while RNA is single-stranded.

    True
  • The sugar in DNA is deoxyribose, while the sugar in RNA is ribose