Prokaryotic Cell Genetics and Genomes
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Questions and Answers

What is the meaning of the term 'Microbiology'?

  • The study of human biology
  • The study of tiny life forms that are not easily observed without magnification (correct)
  • The study of plant biology
  • The study of large life forms
  • Which term refers to minute living things that are usually too small to be seen with the naked eye?

  • Mammals
  • Reptiles
  • Microorganisms (correct)
  • Insects
  • What does the abbreviation 'ASF' stand for in the context of microbiology?

  • African Swine Flu
  • American Swine Fever
  • Asian Swine Flu
  • African Swine Fever (correct)
  • Who is credited with proposing the first cell theory in 1663?

    <p>Robert Hooke</p> Signup and view all the answers

    Which scientist is associated with the concept of 'Spontaneous Generation'?

    <p>Anton van Leeuwenhoek</p> Signup and view all the answers

    What is the major component of plant cell walls that ruminants lack enzymes to break down?

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

    What did Carolus Von Linnaeus contribute to microbiology?

    <p>Developing binomial nomenclature for organisms</p> Signup and view all the answers

    What specialized chamber in the digestive tract of ruminants is essential for cellulose digestion?

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

    What is the main role of the dense and diverse community of microorganisms in the rumen of ruminants?

    <p>Digest cellulose</p> Signup and view all the answers

    Why do ruminants rely on symbiotic microorganisms in their rumen for digestion?

    <p>To detoxify plant toxins</p> Signup and view all the answers

    Unlike ruminants, what do humans rely on the gut microbiome for in terms of nutrition?

    <p>Breaking down complex carbohydrates</p> Signup and view all the answers

    Where in the human digestive tract are there approximately 1011 microbial cells per gram of colonic contents?

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

    What percentage of cultivated bacteria belong to one of the four phyla Actinobacteria, Firmicutes, Proteobacteria, and Bacteroidetes?

    <p>90%</p> Signup and view all the answers

    How many described phyla does the domain Archaea consist of?

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

    What type of cell structure do Archaea have?

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

    Where did the first isolates of Archaea come from?

    <p>Hot, salty, or acidic sites</p> Signup and view all the answers

    What are small circles of DNA distinct from the chromosome in prokaryotic cells called?

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

    How many major phylogenetic lineages (phyla) have at least one species that has been grown in culture among the Bacteria?

    <p>30</p> Signup and view all the answers

    What do environmental DNA sequences provide evidence for regarding bacterial phyla?

    <p>Existence of at least 80 bacterial phyla</p> Signup and view all the answers

    How many genes are typically encoded in the genomes of Bacteria and Archaea?

    <p>500 - 10,000</p> Signup and view all the answers

    What is the approximate number of base pairs in the DNA of a human cell?

    <p>3 billion</p> Signup and view all the answers

    Which cellular activity culminates in the division of the cell to form two cells?

    <p>Synthesis of new structures</p> Signup and view all the answers

    What proteins carry out reactions that supply energy and perform biosynthesis within microbial cells?

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

    In what sequential processes are enzymes and other proteins synthesized within a cell?

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

    What is the full set of genes in a cell called?

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

    In which type of cells is DNA present within a membrane-enclosed nucleus?

    <p>Eukaryotic cells</p> Signup and view all the answers

    What encodes a protein or an RNA molecule?

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

    Which cells have typically closed circular chromosomes?

    <p>Prokaryotic cells</p> Signup and view all the answers

    What is the mass formed by the aggregation of chromosomes within a prokaryotic cell?

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

    How are the genomes of prokaryotic cells and eukaryotic cells organized differently?

    <p>Prokaryotic cells have circular chromosomes, while eukaryotic cells have linear chromosomes.</p> Signup and view all the answers

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