Biology: Microorganisms Classification

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What is the characteristic of the prokaryotic cell wall?

Lack a cell wall

Made of chitin

Made of cellulose

Contain peptidoglycan (correct)

Which of the following is a characteristic of prokaryotic cells?

Presence of membrane-bound organelles

Smaller in size (correct)

Presence of nuclear membrane

Organised replicative cell cycle

What is the function of the prokaryotic cell wall?

To produce ATP

To synthesize proteins

To maintain cell shape (correct)

To regulate cell growth

What is the difference between Gram (+) and Gram (-) bacteria?

Cell wall composition Signup and view all the answers

What is the primary characteristic of prokaryotic microorganisms?

They are unicellular Signup and view all the answers

What is the component of archaeal cell walls?

Polysaccharides and proteins Signup and view all the answers

Which of the following microorganisms is NOT a type of prokaryote?

Fungi Signup and view all the answers

What is the shape of Vibrio cholerae?

Spiral Signup and view all the answers

What is the name of the antibiotic discovered by Alexander Fleming in 1929?

Penicillin Signup and view all the answers

What is the role of fimbriae in prokaryotic cells?

Adhesion and biofilm formation Signup and view all the answers

What is the process of cell division in prokaryotic cells?

Binary fission Signup and view all the answers

What is the term for the 40-day period that Venetian ships remained under quarantine before approaching Venice port?

Quarantina giorni Signup and view all the answers

What is the primary function of Cyanobacteria?

To produce oxygen Signup and view all the answers

Which of the following is a characteristic of prokaryotic cells?

They can thrive in extreme conditions Signup and view all the answers

What is the system of naming living organisms invented by Carolus Linnaeus?

Binomial nomenclature Signup and view all the answers

Which of the following is an example of a prokaryotic microorganism that lives in extreme conditions?

All of the above Signup and view all the answers

What is the main component of Gram-positive bacteria cell walls?

Peptidoglycan Signup and view all the answers

Which of the following is a characteristic of Gram-positive bacteria?

They absorb crystal violet Signup and view all the answers

What is the function of the peptidoglycan layer in Gram-positive bacteria?

To provide resistance to physical stress Signup and view all the answers

What is the composition of the outer membrane of Gram-negative bacteria?

Phospholipids, proteins, and lipopolysaccharides Signup and view all the answers

Which of the following bacteria is an example of Gram-negative bacteria?

Escherichia coli Signup and view all the answers

What is the difference between the cell walls of Gram-positive and Gram-negative bacteria?

Gram-positive bacteria have a large amount of peptidoglycan, while Gram-negative bacteria have a small amount Signup and view all the answers

Why do Gram-positive bacteria stain purple in Gram staining?

Because they absorb crystal violet Signup and view all the answers

What is the function of the outer lipopolysaccharide layer in Gram-negative bacteria?

To make the bacteria resistant to lysozyme and penicillin Signup and view all the answers

What is the main source of many antibiotics?

Streptomyces Signup and view all the answers

What is the disease caused by Clostridium tetani?

Tetanus Signup and view all the answers

What is the name of the neurotoxin produced by Clostridium botulinum?

Botulinum toxin Signup and view all the answers

What is the result of botulinum toxin action at the neuromuscular junction?

Inhibition of acetylcholine release Signup and view all the answers

What is the cause of death in botulism?

Respiratory muscle failure Signup and view all the answers

What is the characteristic of Mycoplasmas?

They have no cell wall Signup and view all the answers

What is the disease caused by Bacillus anthracis?

Anthrax Signup and view all the answers

What is the name of the Gram-positive bacterium that contaminates improperly canned food?

Clostridium botulinum Signup and view all the answers

What type of flagella structure is found in Spirochetes?

Axial filament Signup and view all the answers

What is the function of the motor in a prokaryotic flagellum?

Provides energy for rotation Signup and view all the answers

Biology: Microorganisms Classification

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Questions and Answers

What is the characteristic of the prokaryotic cell wall?

Which of the following is a characteristic of prokaryotic cells?

What is the function of the prokaryotic cell wall?

What is the difference between Gram (+) and Gram (-) bacteria?

What is the primary characteristic of prokaryotic microorganisms?

What is the component of archaeal cell walls?

Which of the following microorganisms is NOT a type of prokaryote?

What is the shape of Vibrio cholerae?

What is the name of the antibiotic discovered by Alexander Fleming in 1929?

What is the role of fimbriae in prokaryotic cells?

What is the process of cell division in prokaryotic cells?

What is the term for the 40-day period that Venetian ships remained under quarantine before approaching Venice port?

What is the primary function of Cyanobacteria?

Which of the following is a characteristic of prokaryotic cells?

What is the system of naming living organisms invented by Carolus Linnaeus?

Which of the following is an example of a prokaryotic microorganism that lives in extreme conditions?

What is the main component of Gram-positive bacteria cell walls?

Which of the following is a characteristic of Gram-positive bacteria?

What is the function of the peptidoglycan layer in Gram-positive bacteria?

What is the composition of the outer membrane of Gram-negative bacteria?

Which of the following bacteria is an example of Gram-negative bacteria?

What is the difference between the cell walls of Gram-positive and Gram-negative bacteria?

Why do Gram-positive bacteria stain purple in Gram staining?

What is the function of the outer lipopolysaccharide layer in Gram-negative bacteria?

What is the main source of many antibiotics?

What is the disease caused by Clostridium tetani?

What is the name of the neurotoxin produced by Clostridium botulinum?

What is the result of botulinum toxin action at the neuromuscular junction?

What is the cause of death in botulism?

What is the characteristic of Mycoplasmas?

What is the disease caused by Bacillus anthracis?

What is the name of the Gram-positive bacterium that contaminates improperly canned food?

What type of flagella structure is found in Spirochetes?

What is the function of the motor in a prokaryotic flagellum?

What is the name of the protein that makes up the filament in a prokaryotic flagellum?

What is the type of motion exhibited by Spirochetes?

Where are the axial filaments located in Spirochetes?

What is the location of the hook in a prokaryotic flagellum?

What determines the rotation direction of a prokaryotic flagellum?

What is the function of the proton motive force in a prokaryotic flagellum?

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