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Bacteria Classification and Structures Quiz

15 Questions

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Bacteria Classification and Structures Quiz

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Questions and Answers

What is the term used to describe the spherical or round-shaped bacteria?

Coccobacilli

Coccus (correct)

Bacillus

Spiral-shaped

Which term is used to describe bacteria that are arranged in groups of four?

Diplococci

Staphylococci

Tetrad (correct)

Streptococci

What is the main component of the gram-positive bacterial cell wall?

Teichoic acids

Outer membrane

Polysaccharides

Peptidoglycan (correct)

What is the function of the teichoic acids in the gram-positive cell wall?

All of the above (D) Signup and view all the answers

What is the term used to describe bacteria that are rod-shaped?

Bacillus (A) Signup and view all the answers

What is the purpose of the cell wall in bacteria?

Both a and b (C) Signup and view all the answers

What is the name of the gelatinous substance located external to the cell wall, composed of polysaccharide or polypeptide, or both?

Glycocalyx (A) Signup and view all the answers

Which of the following is a characteristic of the gram-negative bacterial cell wall?

Contains an outer membrane (D) Signup and view all the answers

What is the term used to describe bacteria that are short and resemble elongated cocci?

Coccobacilli (A) Signup and view all the answers

Which of the following statements about the bacterial cell wall is correct?

The cell wall is composed of peptidoglycan and provides structural support and protection from osmotic damage. (B) Signup and view all the answers

Which of the following statements about the glycocalyx is correct?

The glycocalyx is a gelatinous substance located external to the cell wall, composed of polysaccharides or polypeptides, or both. (C) Signup and view all the answers

Which of the following statements about the arrangement of bacteria is correct?

Tetrads are arranged in groups of four, while coccobacilli are short and resemble elongated cocci. (A) Signup and view all the answers

Which of the following statements about the function of teichoic acids in gram-positive bacteria is correct?

Teichoic acids are surface antigens that can elicit an antibody response and aid in the attachment of the organism to host cells. (D) Signup and view all the answers

Which of the following statements about the components of gram-negative bacterial cell walls is correct?

The outer membrane is a component of gram-negative bacterial cell walls and acts as a permeability barrier. (A) Signup and view all the answers

Which of the following statements about the shapes of bacteria is correct?

Cocci are spherical or round-shaped, while bacilli are rod-shaped. (C) Signup and view all the answers