Molecular Biology: The Cell Structure and Function
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Molecular Biology: The Cell Structure and Function

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Questions and Answers

Which atom in the sugar molecule is connected to the phosphorus atom in a phosphate group?

  • 7-carbon
  • 3-carbon
  • 5-carbon (correct)
  • 1-carbon

    • What is the main difference between deoxyribose and ribose sugars?

  • Deoxyribose has one more carbon atom.
  • Ribose has an extra carbon atom.
  • Deoxyribose has one less oxygen atom. (correct)
  • Ribose has an additional oxygen atom.

    • Where is the nitrogen base connected within a nucleotide?

  • 7-carbon
  • 3-carbon
  • 5-carbon (correct)
  • 9-carbon

    • In DNA, which base replaces thymine in RNA?

    <p>Uracil</p> Signup and view all the answers

    How are nucleotides connected to form the sugar-phosphate backbone in DNA or RNA?

    <p>Phosphodiester bond between 5-carbon and phosphate group</p> Signup and view all the answers

    What are the three main components of a nucleotide?

    <p>Nitrogenous base, pentose sugar, and phosphate group</p> Signup and view all the answers

    Which of the following statements about cells is incorrect?

    <p>All living things consist of only one cell.</p> Signup and view all the answers

    Which of the following is a purine nitrogenous base found in both DNA and RNA?

    <p>Guanine</p> Signup and view all the answers

    Which of the following statements about prokaryotic cells is correct?

    <p>They include bacteria and archaea.</p> Signup and view all the answers

    What is the difference between the sugar components of DNA and RNA?

    <p>DNA has deoxyribose, while RNA has ribose.</p> Signup and view all the answers

    What is the main difference between eukaryotic and prokaryotic cells?

    <p>Eukaryotic cells have a nucleus, while prokaryotic cells do not.</p> Signup and view all the answers

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