Cell Division
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Questions and Answers

Which of the following is NOT a domain of life mentioned in the text?

  • Bacteria
  • Viruses (correct)
  • Archaea
  • Eukarya
  • What is the function of the cell wall in a typical bacterial cell?

  • Protein synthesis
  • DNA storage
  • Cellular respiration
  • Protection and structural support (correct)
  • Which of the following is NOT a specialized structure mentioned in the text?

  • Pili
  • Vesicles
  • Nanotubes
  • Ribosomes (correct)
  • Which of the following is NOT considered a cell surface structure in bacteria?

    <p>S-layer</p> Signup and view all the answers

    Which of the following cell surface structures is responsible for facilitating genetic exchange between bacterial cells?

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

    Which protein is involved in shaping the morphology of bacterial cells?

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

    Which of the following is a function of the cytoplasm in a bacterial cell?

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

    What is the function of hopanoids in the cell membrane?

    <p>Stabilize the membrane</p> Signup and view all the answers

    What is the primary function of the cell wall in prokaryotic cells?

    <p>Provide shape and rigidity</p> Signup and view all the answers

    Which stain is used to distinguish between Gram-positive and Gram-negative bacteria?

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

    What is the purpose of penicillin-binding proteins in bacterial cell walls?

    <p>To catalyze the formation of peptide cross-bridges</p> Signup and view all the answers

    What is the main concern with antibiotic resistance?

    <p>Loss of effectiveness of antibiotics</p> Signup and view all the answers

    Which of the following structures is involved in endospore formation by Firmicutes like Bacillus and Clostridium species?

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

    What is the function of pili in bacteria?

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

    Which of the following is responsible for the movement of a bacterium in response to chemical gradients?

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

    Which process is responsible for the formation of the septum during bacterial cell division?

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

    What is the function of FtsZ in bacterial cell division?

    <p>To polymerize and form the Z-ring</p> Signup and view all the answers

    What is the role of the replisome in bacterial DNA replication?

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

    Which structures are present in the core of an endospore?

    <p>Small acid-soluble spore proteins (SASP)</p> Signup and view all the answers

    What is the function of the calcium-dipicolinic acid (DPA) complex in an endospore?

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

    Which statement about endospores is true?

    <p>They are formed during sporulation</p> Signup and view all the answers

    In which organisms are endospores present?

    <p>Only gram-positive bacteria</p> Signup and view all the answers

    What is the main function of endospores?

    <p>To disperse via wind, water, or animal gut</p> Signup and view all the answers

    How are bacteria named using the binomial system?

    <p>By their genus and species</p> Signup and view all the answers

    What is the difference between a strain and a serotype?

    <p>A strain differs genetically, while a serotype differs phenotypically</p> Signup and view all the answers

    Which of the following is NOT a mode of locomotion mentioned in the text?

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

    What is the width of the long, thin appendages in bacteria?

    <p>15-20 nm</p> Signup and view all the answers

    What is the composition of the filament in flagella?

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

    Which direction does flagella rotate relative to the cell?

    <p>Clockwise (CW)</p> Signup and view all the answers

    What causes flagella to bundle together and push the cell forward?

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

    What causes flagellar bundle to fall apart and result in a 'tumble'?

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

    What is the term for the directed movement of a bacterium in response to chemical or physical gradients?

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

    What is the term for the movement of a bacterium in response to light?

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

    What is the term for the movement of a bacterium in response to oxygen?

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

    What is the term for the movement of a bacterium in response to water?

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

    Which of the following is NOT a specialized structure mentioned in the text?

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

    What is the primary function of the cell wall in prokaryotic cells?

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

    Which of the following cell surface structures is responsible for facilitating genetic exchange between bacterial cells?

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

    Which process is responsible for the formation of the septum during bacterial cell division?

    <p>Binary fission</p> Signup and view all the answers

    What is the term for the movement of a bacterium in response to light?

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

    What is the function of pili in bacteria?

    <p>Genetic exchange</p> Signup and view all the answers

    In which organisms are endospores present?

    <p>Gram-positive bacteria</p> Signup and view all the answers

    Which of the following is NOT considered a cell surface structure in bacteria?

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

    What is the composition of the filament in flagella?

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

    Which of the following is a function of the cytoplasm in a bacterial cell?

    <p>Metabolic reactions</p> Signup and view all the answers

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