Gene Expression and Protein Synthesis
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Questions and Answers

What is the total number of possible codons in the triplet code?

  • 43
  • 21
  • 64 (correct)
  • 61

    • What is the result of a nonsense mutation?

  • A change in the amino acid sequence
  • Premature termination of translation (correct)
  • No change in the amino acid sequence
  • New or enhanced activity of a protein

    • What is the characteristic of the genetic code that allows more than one codon to specify a particular amino acid?

  • Degeneracy (correct)
  • Ambiguity
  • Mutability
  • Universality

    • What is the effect of an insertion or deletion mutation on the reading frame?

    <p>It may alter the reading frame and change many codons</p> Signup and view all the answers

    What is a characteristic of a conditional mutation?

    <p>It causes a mutant phenotype in only a certain environment</p> Signup and view all the answers

    What is the result of a mutation that affects the survival of the organism?

    <p>Lethal mutation</p> Signup and view all the answers

    What is the process by which DNA directs protein synthesis?

    <p>Transcription and translation</p> Signup and view all the answers

    What is the function of RNA polymerase?

    <p>Producing mRNA during transcription</p> Signup and view all the answers

    Which component of a cell is responsible for the synthesis of polypeptides?

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

    What is the role of codons in protein synthesis?

    <p>Coding for specific amino acids in a polypeptide</p> Signup and view all the answers

    Which stage of gene expression involves the synthesis of a polypeptide?

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

    What is the function of the genome in an organism?

    <p>Determining physical traits</p> Signup and view all the answers

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