Microbial Nutrient Uptake Mechanisms

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Questions and Answers

How do microorganisms primarily take in nutrients?

  • Passive diffusion (correct)
  • Group translocation
  • Endocytosis
  • Facilitated diffusion

Which transport mechanism is utilized by all microorganisms for nutrient uptake?

  • Group translocation
  • Endocytosis
  • Facilitated diffusion
  • Active transport (correct)

Which nutrient uptake mechanism is specific to Bacteria and Archaea?

  • Endocytosis
  • Group translocation (correct)
  • Facilitated diffusion
  • Passive diffusion

What is the primary method of nutrient uptake in Eukarya?

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

What is the main function of the bacterial cell wall peptidoglycan?

<p>Maintains shape of the bacterium (D)</p> Signup and view all the answers

Which type of bacteria has a thick peptidoglycan layer that appears purple in a Gram stain?

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

What distinguishes Gram negative bacteria from Gram positive bacteria in terms of peptidoglycan?

<p>They have a thinner peptidoglycan layer and an outer membrane (D)</p> Signup and view all the answers

What is the significance of the bacterial cell wall peptidoglycan in protecting the cell?

<p>Helps protect the cell from osmotic lysis and toxic materials (B)</p> Signup and view all the answers

What is the composition of the outer membrane of Gram negative cell walls?

<p>Lipids, lipoproteins, and lipopolysaccharide (LPS) (A)</p> Signup and view all the answers

Which type of bacteria has a thin layer of peptidoglycan surrounded by an outer membrane?

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

What is the main component of Gram negative cell walls?

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

What is the key difference between Gram negative and Gram positive cell walls in terms of peptidoglycan?

<p>Gram negative has a thin layer of peptidoglycan, while Gram positive has a thick layer (D)</p> Signup and view all the answers

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