BIO 102: Unit 3 Exam Study Guide: Specialized Cells & Cell Signaling
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Questions and Answers

What is the primary function of DNA?

  • To create proteins via translation
  • To dictate the synthesis of messenger RNA (mRNA) (correct)
  • To carry the genetic information translated by ribosomes
  • To dictate the synthesis of transfer RNA (tRNA)

    • Which nitrogenous base is found only in DNA?

  • Thymine (correct)
  • Adenine
  • Cytosine
  • Uracil

    • What are the two families of nitrogenous bases?

  • Pyrimidines and uracils
  • Adenines and guanines
  • Pyrimidines and purines (correct)
  • Purines and cytosines

    • Which type of nucleic acid is responsible for protein production in the cytoplasm?

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

    Which nucleotide component includes a five-carbon sugar?

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

    What is the function of RNA in protein synthesis?

    <p>Creating proteins via translation</p> Signup and view all the answers

    What is the function of Primase at a replication fork?

    <p>Synthesizes RNA primers</p> Signup and view all the answers

    When do cells typically exit the cell cycle to enter a nondividing state?

    <p>G1 phase</p> Signup and view all the answers

    What is the main difference between the leading and lagging strands during DNA replication?

    <p>Lagging strand replicates continuously</p> Signup and view all the answers

    Which protein is responsible for stabilizing the unwound parental DNA strands during replication?

    <p><strong>Single-strand binding</strong></p> Signup and view all the answers

    What is the main function of Topoisomerase at a replication fork?

    <p>Breaks and rejoins the parental DNA</p> Signup and view all the answers

    In which phase do cells prevent entry into mitosis when DNA damage is detected?

    <p><strong>G2 phase</strong></p> Signup and view all the answers

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