Bacterial Nucleoid and Plasmids
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Questions and Answers

Which of the following molecules are synthesized by N.deltocephalinicola for insects?

  • Essential amino acids (correct)
  • Lipids
  • Carbohydrates
  • Proteins

Which color in the provided text represents Insect DNA?

  • Red
  • Blue (correct)
  • Yellow
  • Green

What is the extreme halophile Archaeon mentioned in the text?

  • Halonium walsbyi
  • Halobacterium walsbyi
  • Halococcus walsbyi
  • Haloquadratum walsbyi (correct)

What is the primary component of Gram-Positive cell walls?

<p>Peptidoglycan (D)</p> Signup and view all the answers

Which process does Facilitated Diffusion not require?

<p>Energy (B)</p> Signup and view all the answers

What is the siderophore involved in iron acquisition in Pseudomonas aeruginosa?

<p>Pyoverdine (C)</p> Signup and view all the answers

Why is the surface to volume ratio (S/V) important in limiting cell size?

<p>To ensure proper nutrient uptake by allowing nutrients to diffuse into the cell efficiently (A)</p> Signup and view all the answers

How does the lack of a cell wall benefit Ultramicrobacteria?

<p>It allows them to resist certain antibiotics like penicillin (B)</p> Signup and view all the answers

Why is Nanoarchaeum equitans not considered 'free living'?

<p>Because it has a symbiotic relationship with another organism for survival (C)</p> Signup and view all the answers

What role does Nasuia deltocephalinicola play in its host's life cycle?

<p>It synthesizes essential nutrients for the host (D)</p> Signup and view all the answers

What advantage does the small size of Mycoplasma genitalium provide in adaptation to nutrient-poor conditions?

<p>Enhanced surface-area-to-volume ratio for efficient nutrient uptake (A)</p> Signup and view all the answers

Which bacterial cytoskeletal molecule is responsible for maintaining cell shape in many rod-shaped bacteria?

<p>MreB (C)</p> Signup and view all the answers

Why are drug-resistant strains of Ultramicrobacteria becoming a significant concern?

<p>Because they lack a cell wall, making them unaffected by many antibiotics (C)</p> Signup and view all the answers

What is the function of gas vacuoles found in aquatic, photosynthetic bacteria and archaea?

<p>Provide buoyancy (C)</p> Signup and view all the answers

Which of the following is NOT a function of inclusion bodies in bacteria?

<p>Energy production (C)</p> Signup and view all the answers

Which bacterial structure is responsible for orienting bacteria in Earth's magnetic field for aerotaxis?

<p>Magnetosomes (D)</p> Signup and view all the answers

What is the main role of polyphosphate in bacterial cells?

<p>Energy storage (D)</p> Signup and view all the answers

What is the primary function of capsules, slime layers, and S layers in bacteria?

<p>Protection from environmental stress (B)</p> Signup and view all the answers

What is the main function of nucleoid proteins in bacteria and archaea?

<p>Aid in DNA supercoiling (A)</p> Signup and view all the answers

How do plasmids differ from the chromosome in bacteria and archaea?

<p>They replicate independently of the chromosome (A)</p> Signup and view all the answers

Which type of plasmids is capable of transferring genetic material between bacteria in direct contact?

<p>Fertility-F-plasmids (A)</p> Signup and view all the answers

What distinguishes Col-plasmids from other types of plasmids?

<p>Code for proteins that kill other bacteria (C)</p> Signup and view all the answers

In what way are nucleoid proteins different from histones?

<p>Bacteria lack histones (B)</p> Signup and view all the answers

How do plasmids contribute to bacterial survival?

<p>By conferring selective advantages such as drug resistance (A)</p> Signup and view all the answers

What is the main function of pili and fimbriae?

<p>Mediate attachment to surfaces (B)</p> Signup and view all the answers

How do sex pili differ from fimbriae?

<p>Sex pili are required for bacterial mating (B)</p> Signup and view all the answers

What is the function of flagella in bacteria?

<p>Facilitate bacterial movement (C)</p> Signup and view all the answers

What produces the torque needed for flagellar movement in bacteria?

<p>Protons moving through channels (B)</p> Signup and view all the answers

How do flagella compare in efficiency to man-made devices?

<p>More efficient (B)</p> Signup and view all the answers

What is the role of the stator in flagellar movement?

<p>Interacting with C ring and MS ring (C)</p> Signup and view all the answers

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