Genetics Overview: Genes, Chromosomes, Genome, Nucleoid
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Questions and Answers

What is the primary focus of genetics?

  • Understanding how genes are replicated (correct)
  • Investigating the physical carriers of hereditary information
  • Studying the structure of chromosomes
  • Exploring the structure of nucleoids
  • What are genes composed of?

  • Histone-like proteins
  • Ribosomal RNA
  • Nucleotides (correct)
  • Plasmids
  • How is the genome defined?

  • The hereditary information contained in chromosomes
  • The entire genetic information in a cell including chromosomes and plasmids (correct)
  • The genetic information in a cell excluding plasmids
  • The DNA found within ribosomes
  • What is the function of nucleoids in a bacterial cell?

    <p>To maintain DNA supercoiling</p> Signup and view all the answers

    How is DNA accessibility for replication or transcription achieved in E. coli cells?

    <p>By making nicks in single strands to relax supercoiling</p> Signup and view all the answers

    Based on the Genetic Map of E. coli Chromosome, what shape is usually associated with the bacterial chromosome?

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

    What does the distance between genes in e.coli indicate?

    <p>The level of gene clustering in the genome</p> Signup and view all the answers

    Why does every gene in e.coli require a promoter for transcription?

    <p>To initiate the synthesis of a complementary mRNA strand</p> Signup and view all the answers

    In e.coli, what is the main reason for the absence of introns in the genome?

    <p>To make every part of the genome useful</p> Signup and view all the answers

    What role does a promoter play in gene expression?

    <p>Binding RNA polymerase for transcription initiation</p> Signup and view all the answers

    Why do genes that are closer together in e.coli take less time to transfer during conjugation?

    <p>Due to the presence of short tandem repeats (STR)</p> Signup and view all the answers

    What determines the direction of transcription in prokaryotes?

    <p>Promoter sequence on DNA</p> Signup and view all the answers

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